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<span style="font-size:12pt;font-family:Calibri, Arial, Helvetica, sans-serif;color:rgb(0, 0, 0);background-color:rgb(255, 255, 255);line-height:1.5">Hello All,</span>
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<div dir="auto">Tomorrow, May 16th at 1PM (EDT), Pooja Mukherjee will give a (virtual) theory seminar on</div>
<div><a href="https://jlab-org.zoomgov.com/j/1611179843?pwd=M09CNTFpbFVZSW1IQlhIMGp3RUVHUT09" style="color:rgb(0, 120, 212)">https://jlab-org.zoomgov.com/j/1611179843?pwd=M09CNTFpbFVZSW1IQlhIMGp3RUVHUT09</a><br>
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<div>Please see below for the title and abstract of Pooja's talk.<br>
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<div><u><b>Theory Seminar</b></u></div>
<div>Monday, May 16th at 1:00PM</div>
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<div><u><b>Pooja Mukherjee</b></u><span> </span>(University of Bonn)</div>
<div>will discuss "Next-to SV resumed Drell-Yan cross section beyond leading-logarithmic accuracy"</div>
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<div><u><b>Abstract</b></u>:</div>
<div>We present the resumed predictions for inclusive cross section
<div>for Drell-Yan (DY) production up to next-to-next-to-leading logarithmic</div>
<div>( $\rm \overline{ NNLL}$ ) accuracy taking into account both soft virtual (SV)</div>
<div>and next-to SV (NSV) threshold logarithms. We restrict ourselves to resumed</div>
<div>contributions only from quark anti-quark ( $q \bar q$ ) initiated channels.</div>
<div>The resummation is performed in Mellin- $N$-space. We derive</div>
<div>the $N$-dependent coefficients and the $N$-independent constants to the</div>
<div>desired accuracy for our study. The resumed results are matched through the</div>
<div>minimal prescription procedure with the fixed order results. We find that</div>
<div>resummation, taking into account the NSV terms, appreciably increases</div>
<div>the cross-section while decreasing the sensitivity to the renormalization</div>
<div>scale. We observe that, at 13 TeV LHC energies, the SV + NSV summary at</div>
<div>$\rm \overline{ NLL}(\rm \overline{NNLL})$ gives about 8% (2%) corrections respectively to the</div>
<div>NLO (NNLO) results for the considered Q range: 150–3500 GeV. In addition,</div>
<div>the absence of quark-gluon-initiated contributions to the NSV part in the</div>
<div>resumed terms leaves large factorization scale dependence indicating their</div>
<div>importance at NSV level. In summary, our analysis provides the precise</div>
<div>numerical predictions from resumed NSV terms upto $\rm NNLO + \overline</div>
<div>{\rm{NNLL}}$ level for the first time to the invariant mass distribution of</div>
a pair of leptons produced at the LHC.<br>
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<div dir="auto">See you tomorrow!</div>
Caroline, Colin & Patrick</div>
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