<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi Mike and Barry,<div class=""><br class=""></div><div class="">Thanks for your comments. I recognize that the PARA/PERP (or in LaTeX $\perp/\parallel$) nomenclature is not required to describe the beam asymmetry observable, but it can be handy in describing the yield asymmetry (or moment) measurement technique, such as</div><div class=""><br class=""></div><div class=""><div style="margin: 0px; font-stretch: normal; line-height: normal; font-family: Monaco; color: rgb(0, 0, 0);" class="">\frac{Y_\perp - Y_\parallel}{Y_\perp + Y_\parallel}</div></div><div class=""><br class=""></div><div class="">So I’m not suggesting that all beam asymmetry papers need to include this nomenclature, but instead that it’s up to the discretion of the paper's authors if this notation is useful to describe our measurement technique. </div><div class=""><br class=""></div><div class="">As I mentioned before, I think this nomenclature will naturally disappear as we move toward more complex observables. So I hope we can be flexible with this to allow authors to draft text as they see fit and we can evaluate in the Review Committee and Collaboration Review if changes should be made.</div><div class=""><br class=""></div><div class="">-Justin<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Nov 22, 2019, at 12:16 PM, Barry Ritchie <<a href="mailto:Barry.Ritchie@asu.edu" class="">Barry.Ritchie@asu.edu</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Notice that in this classic paper on the polarization observables, no use of the terms (or symbols) PARA and PERP is present, per se. ---BGR</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Professor Barry G. Ritchie<span class="Apple-converted-space"> </span></span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Department of Physics<span class="Apple-converted-space"> </span></span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Arizona State University<span class="Apple-converted-space"> </span></span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; 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float: none; display: inline !important;" class=""> </span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Phone: (480) 965-4707<span class="Apple-converted-space"> </span></span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Fax: (480) 965-7954</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">-----Original Message-----</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">From: Halld-physics <</span><a href="mailto:halld-physics-bounces@jlab.org" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">halld-physics-bounces@jlab.org</a><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">> On Behalf Of Michael Dugger</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Sent: Friday, November 22, 2019 9:51 AM</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">To: Justin Stevens <</span><a href="mailto:jrsteven@jlab.org" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">jrsteven@jlab.org</a><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">></span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Cc:<span class="Apple-converted-space"> </span></span><a href="mailto:halld-physics@jlab.org" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">halld-physics@jlab.org</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Subject: Re: [Halld-physics] [EXTERNAL] polarization orientations</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Justin,</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">The PARA and PERP are orientations relative to the floor. If we use the PARA and PERP to describe the 0/90 and the 45/-45 we would need to specify that PARA sometime is relative to the floor and sometimes relative to 45 degrees from the floor.</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Please note: In my paper that you link to, it is clearly written (page 3, section II, paragraph 3) that PARA and PERP orientations are relative to the floor.</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Once we started using 45/-45 orientations, the PARA and PERP designations became confusing when describing those 45/-45 orientations.</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">It is only in the intermediate results that an orientation is used and those orientations are always experiment specific. There is no need to follow what I (or others) used in past papers for the designation of polarization orientation.</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">The beam asymmetry has no orientation and that is the physical quantity of interest.</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Take care,</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Michael</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><blockquote type="cite" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Hi All,<br class=""><br class="">My 2 cents: PARA and PERP is really only a useful nomenclature for<span class="Apple-converted-space"> </span><br class="">beam asymmetry measurements to define our asymmetry measurement<span class="Apple-converted-space"> </span><br class="">technique and to be consistent with the notation used in previous<span class="Apple-converted-space"> </span><br class="">measurements at other experiments (and included in their papers e.g.<br class=""><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__journals.aps.org_" class="">https://urldefense.proofpoint.com/v2/url?u=https-3A__journals.aps.org_</a><br class="">prc_pdf_10.1103_PhysRevC.88.065203&d=DwICAg&c=l45AxH-kUV29SRQusp9vYR0n<br class="">1GycN4_2jInuKy6zbqQ&r=zBN4Bgxto13Uvphde6V9iq67cquO40D39On3RCdOAWQ&m=1l9GEDH1beEMRZ-1rXFyQ03jeS6lDsAbJxIThw6cWz4&s=WOXwz_QeKcg0rwCOG4mObMXNfAyaKmF8KFZbfvAwsoA&e= ). For most of our ongoing and future analyses of SDMEs, amplitude analyses, etc. the polarization angle is the relevant quantity and PARA/PERP are unnecessary.<br class=""><br class="">So I would suggest we continue using this PARA and PERP nomenclature<span class="Apple-converted-space"> </span><br class="">in our beam asymmetry publications if the paper's authors deem it<span class="Apple-converted-space"> </span><br class="">useful in describing the results. And it will likely naturally fade<span class="Apple-converted-space"> </span><br class="">away as we move beyond beam asymmetries.<br class=""><br class="">-Justin<br class=""><br class=""><blockquote type="cite" class="">On Nov 22, 2019, at 6:34 AM, Michael Dugger <<a href="mailto:dugger@jlab.org" class="">dugger@jlab.org</a>> wrote:<br class=""><br class="">Hi,<br class=""><br class="">In my previous email I should have used the new orientations.<br class=""><br class="">Where I wrote 135 degree I should have used -45 degree instead.<br class=""><br class="">Take care,<br class="">Michael<br class=""><br class=""><blockquote type="cite" class="">Hi,<br class=""><br class="">I am with Mark. The PARA and PERP orientations are from the past,<span class="Apple-converted-space"> </span><br class="">where PARA was parallel to the floor and PERP was perpendicular to the floor.<br class="">Internally it hardly matters, but to the outside world the PERP and<span class="Apple-converted-space"> </span><br class="">PARA designations used with 45/135 degree orientations will probably<span class="Apple-converted-space"> </span><br class="">be confusing. We just need the angles 0, 45, 90, 135.<br class=""><br class="">Once the orientation is given in degree, the PARA and PERP<span class="Apple-converted-space"> </span><br class="">designations are superfluous.<br class=""><br class="">Take care,<br class="">Michael<br class=""><br class=""><blockquote type="cite" class="">I have never liked the PARA and PERP designations appearing in<span class="Apple-converted-space"> </span><br class="">communications outside the Collaboration. It is jargon IMHO. PARA<span class="Apple-converted-space"> </span><br class="">to what? PERP to what? Why ALL CAPS? Why not PARALLEL and PENDICULAR?<br class=""><br class="">I think 0/90 and -45/45 tell the whole story in a way that is<span class="Apple-converted-space"> </span><br class="">jargon-free or nearly so.<br class=""><br class="">On 11/21/19 8:07 PM, Curtis A Meyer wrote:<br class=""><blockquote type="cite" class="">Hi Everyone -<br class=""><br class=""> in regard to the referring to the polarization as -45/+45, Will<span class="Apple-converted-space"> </span><br class="">has provided the attached plot that may be useful<br class=""><br class="">Curtis<br class=""><br class=""><br class=""><br class=""><br class="">Curtis A. Meyer|MCS Associate Dean for Research The Otto Stern<span class="Apple-converted-space"> </span><br class="">Professor of Physics<span class="Apple-converted-space"> </span><a href="mailto:cmeyer@cmu.edu" class="">cmeyer@cmu.edu</a><br class=""><<a href="mailto:cmeyer@cmu.edu" class="">mailto:cmeyer@cmu.edu</a>>|412 268 2745 Carnegie Mellon University<span class="Apple-converted-space"> </span><br class="">Department of Physics, Wean Hall 8414<br class="">5000 Forbes Ave., Pittsburgh PA, 15213<span class="Apple-converted-space"> </span><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.curtismeyer.com&d=DwIFAw&c=CJqEzB1piLOyyvZjb8YUQw&r=nTWoLox3qePKkU3jkN4zKWpZiD5wwsYi6X23ArE2v3s&m=tKsT0r0GoTCIvY-VCDLwLAfEK8xewTz3KgRpaRNDtP8&s=qFYlKWGSijOvWXdeGtb400qROp-lPRQlaYUcrC8bO2k&e=" class="">https://urldefense.proofpoint.com/v2/url?u=http-3A__www.curtismeyer.com&d=DwIFAw&c=CJqEzB1piLOyyvZjb8YUQw&r=nTWoLox3qePKkU3jkN4zKWpZiD5wwsYi6X23ArE2v3s&m=tKsT0r0GoTCIvY-VCDLwLAfEK8xewTz3KgRpaRNDtP8&s=qFYlKWGSijOvWXdeGtb400qROp-lPRQlaYUcrC8bO2k&e=</a><span class="Apple-converted-space"> </span> <br class=""><<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.curtismey" class="">https://urldefense.proofpoint.com/v2/url?u=http-3A__www.curtismey</a><br class=""><a href="http://er.com/" class="">er.com</a>&d=DwMFAg&c=CJqEzB1piLOyyvZjb8YUQw&r=p3b5acpwYNkmZ3alLqoe1Dp<br class="">cHi6vq5JvK_7ohJe1WqI&m=uoF2pX6Pqr0jXdX1Yj_zBCYx0Mlfo07-z6Ku8BBVZX8<br class="">&s=JTIqK28pmrasWN8txNY6iK7aAvgjPibsz134yzdySNY&e=><br class=""><br class=""><br class=""><br class=""><br class=""><br class="">_______________________________________________<br class="">Halld-physics mailing list<br class=""><a href="mailto:Halld-physics@jlab.org" class="">Halld-physics@jlab.org</a><br class=""><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__mailman.jlab" class="">https://urldefense.proofpoint.com/v2/url?u=https-3A__mailman.jlab</a>.<br class="">org_mailman_listinfo_halld-2Dphysics&d=DwICAg&c=l45AxH-kUV29SRQusp<br class="">9vYR0n1GycN4_2jInuKy6zbqQ&r=zBN4Bgxto13Uvphde6V9iq67cquO40D39On3RC<br class="">dOAWQ&m=1l9GEDH1beEMRZ-1rXFyQ03jeS6lDsAbJxIThw6cWz4&s=l5wph5UGumnk<br class="">_uA_cdDMMo-UuW3JzpCGXnGLWhMYSsY&e=<br class=""></blockquote>_______________________________________________<br class="">Halld-physics mailing list<br class=""><a href="mailto:Halld-physics@jlab.org" class="">Halld-physics@jlab.org</a><br class=""><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__mailman.jlab.o" class="">https://urldefense.proofpoint.com/v2/url?u=https-3A__mailman.jlab.o</a><br class="">rg_mailman_listinfo_halld-2Dphysics&d=DwICAg&c=l45AxH-kUV29SRQusp9v<br class="">YR0n1GycN4_2jInuKy6zbqQ&r=zBN4Bgxto13Uvphde6V9iq67cquO40D39On3RCdOA<br class="">WQ&m=1l9GEDH1beEMRZ-1rXFyQ03jeS6lDsAbJxIThw6cWz4&s=l5wph5UGumnk_uA_<br class="">cdDMMo-UuW3JzpCGXnGLWhMYSsY&e=<br class=""></blockquote><br class=""><br class="">_______________________________________________<br class="">Halld-physics mailing list<br class=""><a href="mailto:Halld-physics@jlab.org" class="">Halld-physics@jlab.org</a><br class=""><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__mailman.jlab.or" class="">https://urldefense.proofpoint.com/v2/url?u=https-3A__mailman.jlab.or</a><br class="">g_mailman_listinfo_halld-2Dphysics&d=DwICAg&c=l45AxH-kUV29SRQusp9vYR<br class="">0n1GycN4_2jInuKy6zbqQ&r=zBN4Bgxto13Uvphde6V9iq67cquO40D39On3RCdOAWQ&<br class="">m=1l9GEDH1beEMRZ-1rXFyQ03jeS6lDsAbJxIThw6cWz4&s=l5wph5UGumnk_uA_cdDM<br class="">Mo-UuW3JzpCGXnGLWhMYSsY&e=<br class=""><br class=""></blockquote><br class=""><br class="">_______________________________________________<br class="">Halld-physics mailing list<br class=""><a href="mailto:Halld-physics@jlab.org" class="">Halld-physics@jlab.org</a><br class=""><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__mailman.jlab.org" class="">https://urldefense.proofpoint.com/v2/url?u=https-3A__mailman.jlab.org</a><br class="">_mailman_listinfo_halld-2Dphysics&d=DwICAg&c=l45AxH-kUV29SRQusp9vYR0n<br class="">1GycN4_2jInuKy6zbqQ&r=zBN4Bgxto13Uvphde6V9iq67cquO40D39On3RCdOAWQ&m=1<br class="">l9GEDH1beEMRZ-1rXFyQ03jeS6lDsAbJxIThw6cWz4&s=l5wph5UGumnk_uA_cdDMMo-U<br class="">uW3JzpCGXnGLWhMYSsY&e=<br class=""></blockquote><br class=""><br class=""></blockquote><br style="caret-color: rgb(0, 0, 0); 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