<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class=""></div><div class="">(figure 16 in <a href="https://journals.aps.org/prd/pdf/10.1103/PhysRevD.88.094505" class="">https://journals.aps.org/prd/pdf/10.1103/PhysRevD.88.094505</a>) </div><div class="">that the splitting with the state you’re interested in probably grows with increasing quark mass. </div><div class=""><br class=""></div><div class="">In a charmonium calculation (heavy quarks!) the splitting would have gotten quite large, and you’ll see in </div><div class="">figure 16 of <a href="https://link.springer.com/content/pdf/10.1007%2FJHEP07%282012%29126.pdf" class="">https://link.springer.com/content/pdf/10.1007%2FJHEP07%282012%29126.pdf</a></div><div class="">that there is a large splitting, but that the state can now be identified as a non-exotic hybrid meson, in the ‘first excited’ (quarks in a P-wave) set of hybrids. SO if you see two close-by states in your experiment, you might be seeing the radial excitation plus a non-exotic hybrid.</div><div class=""><br class=""></div><div class="">Hope this is helpful. If you have any questions, get in touch,</div><div class=""><br class=""></div><div class="">Thanks,</div><div class="">Jo.</div><div class=""><br class=""></div><br class=""><div><blockquote type="cite" class=""><div class="">On Jun 27, 2017, at 9:49 AM, Curtis Meyer <<a href="mailto:cmeyer@cmu.edu" class="">cmeyer@cmu.edu</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
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With regard to the b2(1650) mentione din Ahmed’s abstract, this should be the b1(1650), which
<div class="">is a radial excitation of the b1(1235) and you can see it in the lattice calculation. A b2 is exotic, and</div>
<div class="">while expected, the mass is probably above 2GeV.</div>
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<div class="">Curtis<br class="">
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Curtis A. Meyer<span class="Apple-tab-span" style="white-space: pre;"> </span>MCS Associate Dean for Faculty and Graduate Affairs<br class="">
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Ahmed Foda<br class="">
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- How are the b1(1235) and b2(1650) related? (Same branch modes?) What is the b2? Is it predicted by lattice?<br class="">
- Why is the -t dependence important in this context?<br class="">
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-- <br class="">
Elton Smith<br class="">
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12000 Jefferson Ave STE 4<br class="">
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