Go for it! Sounds good.<br><br>BB<br><br><div class="gmail_quote">On Fri, Jun 28, 2013 at 7:09 PM, Viktor Mokeev <span dir="ltr"><<a href="mailto:mokeev@jlab.org" target="_blank">mokeev@jlab.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> I support this suggestion.<br>
<br>
Best Regards,<br>
Victor<br>
<br>
----- Original Message -----<br>
From: "Michael Dugger" <<a href="mailto:dugger@jlab.org">dugger@jlab.org</a>><br>
To: "Barry Ritchie" <<a href="mailto:Barry.Ritchie@asu.edu">Barry.Ritchie@asu.edu</a>><br>
Cc: "Viktor Mokeev" <<a href="mailto:mokeev@jlab.org">mokeev@jlab.org</a>>, "Michael Dugger" <<a href="mailto:michael.dugger@asu.edu">michael.dugger@asu.edu</a>>, "Eugene Pasyuk" <<a href="mailto:pasyuk@jlab.org">pasyuk@jlab.org</a>>, "clas hadron" <<a href="mailto:clas_hadron@jlab.org">clas_hadron@jlab.org</a>><br>
Sent: Friday, June 28, 2013 1:06:21 PM<br>
Subject: Re: [Clas_hadron] abstracts for DNP<br>
<br>
<br>
Hi,<br>
<br>
That makes it nice and clear. Sounds good to me.<br>
<br>
Take care,<br>
Michael<br>
<br>
On Fri, 28 Jun 2013, Barry Ritchie wrote:<br>
<br>
> So maybe it would be better to go ahead and have the opening sentence speak about "exclusive eta photoproduction on the proton", which then would not need the qualifier about "one-step excitation". "Generic" eta photoproduction can be inclusive, so saying exclusive cleans that up. As Mike indicates, we only discuss exclusive production in the abstract.<br>
><br>
> Barry G. Ritchie<br>
> Vice Provost for Academic Personnel<br>
> Arizona State University<br>
> 300 E. University Ave, Suite 420<br>
> Tempe, AZ 85287-7805<br>
> <br>
> Phone: 480-965-7405<br>
> Fax: 480-965-0785<br>
><br>
><br>
> -----Original Message-----<br>
> From: Viktor Mokeev [mailto:<a href="mailto:mokeev@jlab.org">mokeev@jlab.org</a>]<br>
> Sent: Friday, June 28, 2013 9:43 AM<br>
> To: Barry Ritchie<br>
> Cc: clas hadron; Michael Dugger; Eugene Pasyuk<br>
> Subject: Re: [Clas_hadron] abstracts for DNP<br>
><br>
> Dear Barry,<br>
><br>
> It is true, but this problem should be resolved in the selection of exclusive events and related corrections for exclusive cross sections should be incorporated.<br>
><br>
> Best Regards,<br>
> Victor<br>
><br>
> ----- Original Message -----<br>
> From: "Barry Ritchie" <<a href="mailto:Barry.Ritchie@asu.edu">Barry.Ritchie@asu.edu</a>><br>
> To: "Michael Dugger" <<a href="mailto:michael.dugger@asu.edu">michael.dugger@asu.edu</a>>, "Eugene Pasyuk" <<a href="mailto:pasyuk@jlab.org">pasyuk@jlab.org</a>><br>
> Cc: "clas hadron" <<a href="mailto:clas_hadron@jlab.org">clas_hadron@jlab.org</a>><br>
> Sent: Friday, June 28, 2013 12:33:20 PM<br>
> Subject: Re: [Clas_hadron] abstracts for DNP<br>
><br>
> But we could have an undetected pion flying around, though, in the 2pi steradians CLAS doesn't cover.<br>
><br>
> Barry G. Ritchie<br>
> Vice Provost for Academic Personnel<br>
> Arizona State University<br>
> 300 E. University Ave, Suite 420<br>
> Tempe, AZ 85287-7805<br>
> <br>
> Phone: 480-965-7405<br>
> Fax: 480-965-0785<br>
><br>
><br>
> -----Original Message-----<br>
> From: <a href="mailto:clas_hadron-bounces@jlab.org">clas_hadron-bounces@jlab.org</a> [mailto:<a href="mailto:clas_hadron-bounces@jlab.org">clas_hadron-bounces@jlab.org</a>] On Behalf Of Michael Dugger<br>
> Sent: Friday, June 28, 2013 9:26 AM<br>
> To: Eugene Pasyuk<br>
> Cc: clas hadron<br>
> Subject: Re: [Clas_hadron] abstracts for DNP<br>
><br>
><br>
> Hi,<br>
><br>
> Since we have the final state as<br>
> p eta,<br>
> we can't have an extra pion flying about. We can probably safely remove the "in one-step excitation processes" part.<br>
><br>
> Take care,<br>
> Michael<br>
><br>
> On Fri, 28 Jun 2013, Eugene Pasyuk wrote:<br>
><br>
>> Igor,<br>
>><br>
>> As alternative to single step you may say that N\eta final state cannot be directly coupled to \Delta resonances.<br>
>><br>
>> -Eugene<br>
>><br>
>> ----- Original Message -----<br>
>>> From: "Igor Senderovich" <<a href="mailto:senderov@jlab.org">senderov@jlab.org</a>><br>
>>> To: "Viktor Mokeev" <<a href="mailto:mokeev@jlab.org">mokeev@jlab.org</a>><br>
>>> Cc: "clas hadron" <<a href="mailto:clas_hadron@jlab.org">clas_hadron@jlab.org</a>><br>
>>> Sent: Friday, June 28, 2013 5:07:33 PM<br>
>>> Subject: Re: [Clas_hadron] abstracts for DNP<br>
>>><br>
>>> Dear Viktor,<br>
>>><br>
>>> What I would call a two-step process is one in which the state<br>
>>> de-excites via two emissions - say Delta excitation decaying with<br>
>>> pion emission to an N* which then emits an eta. This illustrates a<br>
>>> case when detection of an eta would not offer isospin filtering. I am<br>
>>> just being careful to avoid such a counterexample to my statement.<br>
>>><br>
>>> All the best,<br>
>>> -Igor<br>
>>><br>
>>><br>
>>> ----- Original Message -----<br>
>>> From: "Viktor Mokeev" <<a href="mailto:mokeev@jlab.org">mokeev@jlab.org</a>><br>
>>> To: "Igor Senderovich" <<a href="mailto:senderov@jlab.org">senderov@jlab.org</a>><br>
>>> Cc: "clas hadron" <<a href="mailto:clas_hadron@jlab.org">clas_hadron@jlab.org</a>><br>
>>> Sent: Thursday, June 27, 2013 4:55:15 PM<br>
>>> Subject: Re: [Clas_hadron] abstracts for DNP<br>
>>><br>
>>> Dear Igor,<br>
>>><br>
>>> You abstracts look good.<br>
>>><br>
>>> Could you explain what you mean by one-step excitation processes?<br>
>>><br>
>>> Best Regards,<br>
>>> Victor<br>
>>><br>
>>> ----- Original Message -----<br>
>>> From: "Igor Senderovich" <<a href="mailto:senderov@jlab.org">senderov@jlab.org</a>><br>
>>> To: "clas hadron" <<a href="mailto:clas_hadron@jlab.org">clas_hadron@jlab.org</a>><br>
>>> Sent: Thursday, June 27, 2013 11:30:15 AM<br>
>>> Subject: [Clas_hadron] abstracts for DNP<br>
>>><br>
>>> Dear Colleagues,<br>
>>><br>
>>> I would like to submit the two abstracts that follow this e-mail for<br>
>>> the meeting of the DNP and appreciate any feedback you can offer.<br>
>>> Best regards,<br>
>>> -Igor Senderovich<br>
>>><br>
>>> ----------<br>
>>> For the mini-symposium (14e. Mini-Symposium on the Excited Nucleon<br>
>>> State Spectrum and Structure):<br>
>>> Title: Studies of $\eta$ photo-production in the baryon resonance<br>
>>> excitation region with CLAS<br>
>>> Abstract:<br>
>>> Because the pseudoscalar $\eta$ meson has zero isospin, $\eta$<br>
>>> photo-production offers the feature of isolating N* (I=1/2) resonance<br>
>>> states in one-step excitation processes. This ``isospin''<br>
>>> filter property can be very useful in helping disentangle the broad<br>
>>> and overlapping excitations that make up the nucleon resonance<br>
>>> spectrum. For that reason, a program of measurements on $\eta$<br>
>>> photo-production for the reaction $\gamma p \rightarrow \eta p$ has<br>
>>> been conducted using the Hall B CEBAF Large Acceptance Spectrometer<br>
>>> at Jefferson Lab. Results for the differential cross-section and for<br>
>>> single- and double-polarization observables will be summarized. The<br>
>>> general outlook for the ``complete experiment'' program for<br>
>>> disentangling nucleon resonances decaying to the $p \eta$ channel<br>
>>> will be discussed.<br>
>>><br>
>>><br>
>>> A general DNP submission:<br>
>>> Title: Double-polarization E and G observables in $\eta$<br>
>>> photo-production on the CLAS Frozen Spin Target<br>
>>> Abstract:<br>
>>> $\eta$ photo-production is an important tool in baryon spectroscopy,<br>
>>> allowing isolation of N* (I=1/2) resonances in one-step excitation<br>
>>> processes. Furthermore, it has long been recognized that due to<br>
>>> significant overlapping of resonances in the baryon spectrum,<br>
>>> differential cross-sections are not enough; measuring polarization<br>
>>> observables is vital. Extensive data have been collected at Jefferson<br>
>>> Lab in Hall B with circularly and linearly polarized tagged photon<br>
>>> beams incident on longitudinally polarized protons provided by the<br>
>>> Frozen Spin Target (FROST). The presentation will cover analysis and<br>
>>> preliminary results of double-polarization observables E and G in<br>
>>> $\eta$ photo-production - data entirely missing from the world<br>
>>> database.<br>
>>> _______________________________________________<br>
>>> Clas_hadron mailing list<br>
>>> <a href="mailto:Clas_hadron@jlab.org">Clas_hadron@jlab.org</a><br>
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>>><br>
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The George Washington University<br>Director, GW Institute for Nuclear Studies (GWINS)<br>Director, Data Analysis Center (DAC)<br>202-994-6788 (Foggy Bottom Campus)<br>703-726-8340 (Virginia Science and Technology Campus)<br>