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<p class="x_x_MsoNormal" style="background: white;"><span class="x_ContentPasted0 ContentPasted0" style="color: black;">Dear all,</span></p>
<p class="x_x_MsoNormal" style="background: white;"><span class="x_ContentPasted0 ContentPasted0" style="color: black;"> </span></p>
<p class="x_x_MsoNormal" style="background: white;"><span class="x_ContentPasted0 ContentPasted0" style="color: black;">Tomorrow, Wednesday, May 31<sup class="x_ContentPasted0 ContentPasted0">st</sup>, at 1:00PM (EDT), we will have a <span data-markjs="true" class="x_markn00hh1ac0 x_ContentPasted0" data-ogac="" data-ogab="" data-ogsc="" data-ogsb=""><span data-markjs="true" class="markyvxya4cp8 ContentPasted0" data-ogac="" data-ogab="" data-ogsc="" data-ogsb="">cake</span></span> <span data-markjs="true" class="x_marksu56lytmv x_ContentPasted0" data-ogac="" data-ogab="" data-ogsc="" data-ogsb=""><span data-markjs="true" class="mark4tlh7ogll ContentPasted0" data-ogac="" data-ogab="" data-ogsc="" data-ogsb="">seminar</span></span>
given by Justin Cammarota of William & Mary in CEBAF Center room L102.</span></p>
<p class="x_x_MsoNormal" style="background: white;"><span class="x_ContentPasted0 ContentPasted0" style="color: black;"> </span></p>
<p class="x_x_MsoNormal" style="background: white;"><span class="x_ContentPasted0 ContentPasted0" style="color: black;">Please see below for the title and abstract.</span></p>
<p class="x_x_MsoNormal" style="background: white;"><span class="x_ContentPasted0 ContentPasted0" style="color: black;"> </span></p>
<p class="x_x_MsoNormal" style="background: white;"><b><u><span class="x_ContentPasted0 ContentPasted0" style="color: black;"><span data-markjs="true" class="x_markn00hh1ac0 x_ContentPasted0" data-ogac="" data-ogab="" data-ogsc="" data-ogsb=""><span data-markjs="true" class="markyvxya4cp8 ContentPasted0" data-ogac="" data-ogab="" data-ogsc="" data-ogsb="">Cake</span></span> <span data-markjs="true" class="x_marksu56lytmv x_ContentPasted0" data-ogac="" data-ogab="" data-ogsc="" data-ogsb=""><span data-markjs="true" class="mark4tlh7ogll ContentPasted0" data-ogac="" data-ogab="" data-ogsc="" data-ogsb="">Seminar</span></span></span></u></b><span style="color: black;"></span></p>
<p class="x_x_MsoNormal" style="background: white;"><span class="x_ContentPasted0 ContentPasted0" style="color: black;">Wednesday, May 31<sup class="x_ContentPasted0 ContentPasted0">st</sup> at 1:00 PM</span></p>
<p class="x_x_MsoNormal" style="background: white;"><span class="x_ContentPasted0 ContentPasted0" style="color: black;"> </span></p>
<div class="x_x_MsoNormal" style="background: white; margin-top: 0px; margin-bottom: 0px;">
<b><u><span class="x_ContentPasted0" style="color: black;"></span></u></b><span class="x_ContentPasted0 x_ContentPasted1 ContentPasted0" style="color: black;"><b><u class="ContentPasted0">Justin Cammarota</u></b> (William & Mary)</span></div>
<p class="x_x_MsoNormal" style="background: white;"><span class="x_ContentPasted0" style="color: black;"><span class="ContentPasted0">Will discuss “The Impact of QED Effects in SIDIS”</span></span></p>
<p class="x_x_MsoNormal" style="background: white;"><span class="x_ContentPasted0 ContentPasted0" style="color: black;"> </span></p>
<p class="x_x_MsoNormal" style="background: white;"><b><u><span class="x_ContentPasted0 ContentPasted0" style="color: black;">Abstract</span></u></b><span class="x_ContentPasted0 ContentPasted0" style="color: black;">:</span></p>
<p class="x_x_MsoNormal"><span class="x_ContentPasted0 ContentPasted0" style="color: black;"><span class="ContentPasted0"><span style="color: black; background-color: white;"><span style="font-size: 12pt; font-family: Calibri, Helvetica, sans-serif;">The factorization
theorem plays an important role in the analysis of high energy quantum chromodynamic (QCD) processes, separating the nonperturbative hadronic interaction into the universal parton distribution functions (PDFs) and fragmentation functions (FFs) and the process-dependent
interactions into short distance perturbative calculations, with any interference power suppressed. With a virtual photon exchange, lepton-hadron deep inelastic scattering (DIS) provides an electromagnetic hard probe for the partonic structure of colliding
hadron and has played an important role in the development of QCD factorization. However, the collision induced QED radiation can change the momentum of the exchanged but unobserved virtual photon, making the photon-hadron frame, where the factorization formalism
for DIS and semi-inclusive DIS (SIDIS) was derived, ill defined. A new analogous factorization approach has been introduced to separate the leading power process-independent QED radiative contributions to the single photon exchange by introducing lepton distribution
functions (LDFs) and lepton fragmentation functions (LFFs), while process-dependent effects are perturbatively calculated with large logarithms removed [J. High Energ. Phys. 2021, 157 (2021)]. These LDFs and LFFs are considered global, as they appear in many
different interactions, such as $e^+ e^-,$ </span></span><span style="font-size: 12pt; font-family: Calibri, Helvetica, sans-serif; color: black; background-color: white;">DIS, and SIDIS, so data from experiments can be used to fit and describe these functions
across a wide range of lepton scattering. In this talk, I will apply this new factorization approach to lepton-hadron SIDIS to study the cross-section in two different kinematic regions: (1) the scattered lepton and observed hadron are not near back-to-back,
and (2) they are close to back-to-back, where collinear QCD factorization works for (1) and TMD QCD factorization for (2) while collinear QED factorization works for both, in a newly introduced hybrid factorization approach. As part of this work, I show the
effects on the SIDIS cross section using fixed order calculations for the unpolarized structure function by first showing the effect of the radiative corrections on the main kinematic variables, especially how the internal transverse momentum is significantly
correlated to the external angular dependence, and then the unpolarized structure function (or cross section) with matching between the descriptions for low and high transverse momentum.</span></span></span><span class="x_ContentPasted0 ContentPasted0" style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </span><span class="x_ContentPasted0 ContentPasted0" style="color: black;"> </span></p>
<p class="x_x_MsoNormal" style="background: white;"><span class="x_ContentPasted0 ContentPasted0" style="color: black;"> </span></p>
<p class="x_x_MsoNormal" style="background: white;"><span class="x_ContentPasted0 ContentPasted0" style="color: black;">See you tomorrow,</span></p>
<p class="x_x_MsoNormal" style="background: white;"><span class="x_ContentPasted0 ContentPasted0" style="color: black;">Caroline, Joe & Patrick</span></p>
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