<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Folks,<div><br></div><div>I first verified that the fastMC smearing parameters agree with the latest</div><div>version that represents our best knowledge of the forward and central detector</div><div>response. With Mauri's help I investigated the code that was used to analyze the</div><div>fastMC output and that was where the problem lied. The 4-vector for the scattered</div><div>electron contained the generated values. Thus the problem was in the code after</div><div>the fastMC code.</div><div><br></div><div>Regards,</div><div>Daniel</div><div><br><div><div>On Nov 8, 2013, at 9:51 AM, Mac Mestayer wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Hello offliners;<br><br>Dan has discovered what seems to be a serious bug<br>in one particular version of fastmc.<br>For electroproduction of K+ Lambda, he<br>was getting missing mass resolutions too narrow by<br>a factor of two. We think it's because the outgoing<br>electron's momentum was not being smeared.<br>I gave him a frozen, hard-wired version of<br>fastmc (only for the special case of K Lambda) which<br>he will investigate.<br><br>Dan and Kijun will look into this and try to figure out<br>which version of fastmc is correct and will communicate<br>this to people.<br><br> <span class="Apple-tab-span" style="white-space:pre"> </span><span class="Apple-tab-span" style="white-space:pre"> </span><span class="Apple-tab-span" style="white-space:pre"> </span>- Mac<br><br>"<a href="mailto:mestayer@jlab.org">mestayer@jlab.org</a>", (757)-269-7252<br>_______________________________________________<br>Clas_offline mailing list<br><a href="mailto:Clas_offline@jlab.org">Clas_offline@jlab.org</a><br>https://mailman.jlab.org/mailman/listinfo/clas_offline<br></div></blockquote></div><br><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">*********************************************************************************************<br>* *<br>* Dr. Daniel S. Carman e-mail : <a href="mailto:carman@jlab.org">carman@jlab.org</a> * <br>* Staff Scientist office : (757)-269-5586 *<br>* Jefferson Laboratory web: <a href="http://userweb.jlab.org/~carman">http://userweb.jlab.org/~carman</a> * <br>* *<br>*********************************************************************************************</span>
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