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Using the blast-wave model, we explore the effect of electric fields on spectra and flow harmonics (especially the elliptic flow) for charged pions and protons. We incorporate the first-order correction to the single-particle distribution…

Nuclear Theory · Physics 2023-06-14 Ankit Kumar Panda , Reghukrishnan Gangadharan , Victor Roy

We measured angular distributions of recoil-polarization response functions for neutral pion electroproduction for W=1.23 GeV at Q^2=1.0 (GeV/c)^2, obtaining 14 separated response functions plus 2 Rosenbluth combinations; of these, 12 have…

Nuclear Experiment · Physics 2010-05-27 J. J. Kelly

We present a new analysis to extract pion's parton distribution functions (PDFs) in the framework of the statistical model. Starting from the statistical model framework first developed for the spin-1/2 nucleon, we apply appropriate…

High Energy Physics - Phenomenology · Physics 2021-02-03 Claude Bourrely , Franco Buccella , Jen-Chieh Peng

Drell-Yan-like W-boson and Z-boson production in the resonance region allows for high-precision measurements that are crucial to carry experimental tests of the Standard Model to the extremes, such as the determination of the W-boson mass…

High Energy Physics - Phenomenology · Physics 2015-06-19 Stefan Dittmaier , Alexander Huss , Christian Schwinn

For detailed explanation of the experimental results of lepton production cross section in hadronic collisions such as nucleon-nucleon or nucleon-nuclei, it is of great importance to use quarks and sea quarks distribution function inside…

Nuclear Theory · Physics 2016-02-02 R. Rostami , F. Zolfagharpour

We overview the progress made in studies of EMC and short range correlation (SRC) effects with the special emphasis given to the recent observation of the correlation between the slope of the EMC ratio at Bjorken x<1 and the scale factor of…

Nuclear Theory · Physics 2015-06-11 Misak M Sargsian

Drell Yan production is a sensitive probe of new physics and as such has been calculated to high order in both the electroweak and QCD sectors of the Standard Model, allowing for precision comparisons between theory and data. Here we extend…

High Energy Physics - Phenomenology · Physics 2021-09-02 Sally Dawson , Pier Paolo Giardino

We study the modifications to the fragmentation pattern of partons into charged particles in the presence of a hot and dense Quark Gluon Plasma. To this end, we analyze the perturbative renormalization group equations of the track…

High Energy Physics - Phenomenology · Physics 2024-01-10 João Barata , Robert Szafron

We study the perturbative renormalizability of chiral two pion exchange in nucleon-nucleon scattering for p- and d-waves within the effective field theory approach. The one pion exchange potential is fully iterated at the leading order in…

Nuclear Theory · Physics 2011-12-16 M. Pavon Valderrama

Since the discovery that the ratio of inclusive charged lepton (per-nucleon) cross sections from a nucleus A to the deuteron is not unity - even in deep inelastic scattering kinematics - a great deal of experimental and theoretical effort…

Nuclear Experiment · Physics 2014-08-19 Simona Malace , David Gaskell , Douglas W. Higinbotham , Ian Cloet

We study Drell-Yan (DY) dilepton production in proton(deuterium)-nucleus and in nucleus-nucleus collisions within the light-cone color dipole formalism. This approach is especially suitable for predicting nuclear effects in the DY cross…

High Energy Physics - Phenomenology · Physics 2008-11-26 B. Z. Kopeliovich , J. Raufeisen , A. V. Tarasov , M. B. Johnson

We present results for the Drell-Yan process $pp \to Z/\gamma^* + X \to l^+l^- + X$ in the presence of the rapidity dependent jet vetoes $\mathcal{T}_{Bj}$ and $\mathcal{T}_{Cj}.$ These observables provide a tighter veto at central…

High Energy Physics - Phenomenology · Physics 2025-08-11 Thomas Clark , Shireen Gangal , Jonathan R. Gaunt

We report on the first complete computation of the mixed QCD$-$electroweak (EW) corrections to the neutral-current Drell$-$Yan process. Superseding previously applied approximations, our calculation provides the first result at this order…

High Energy Physics - Phenomenology · Physics 2022-01-19 Roberto Bonciani , Luca Buonocore , Massimiliano Grazzini , Stefan Kallweit , Narayan Rana , Francesco Tramontano , Alessandro Vicini

We present an overview of dynamic and related models for pion electroproduction on the nucleon due to Delta(1232) excitation. The electromagnetic multipoles and their ratios obtained from these models and from effective field theories are…

Nuclear Theory · Physics 2008-11-26 D. Drechsel , L. Tiator

The description of the Drell-Yan (DY) transverse momentum spectrum requires matching of fixed order QCD calculations with soft gluon resummation up to all orders in the QCD coupling. It has been noticed in the literature that a consistent…

High Energy Physics - Phenomenology · Physics 2022-03-21 Aleksandra Lelek

Nuclear modifications to the Drell-Yan dilepton production cross sections in p+A and A+A collisions in the leading twist approximation are caused by nuclear effects in the parton distributions of bound nucleons. For non-isoscalar nuclei,…

High Energy Physics - Phenomenology · Physics 2009-01-07 K. J. Eskola , V. J. Kolhinen , C. A. Salgado , R. L. Thews

Starting from a mean-field description for a dispersion of highly charged spherical or (parallel) rod-like colloids, we introduce the simplification of a homogeneous background to include the contribution of other polyions to the static…

Soft Condensed Matter · Physics 2009-11-13 Salete Pianegonda , Emmanuel Trizac , Yan Levin

A new and simple statistical approach is performed to calculate the parton distribution functions (PDFs) of the nucleon in terms of light-front kinematic variables. Analytic expressions of x-dependent PDFs are obtained in the whole x…

High Energy Physics - Phenomenology · Physics 2011-04-07 Lijing Shao , Yunhua Zhang , Bo-Qiang Ma

We revisit the renormalization prescription for the quark-meson model in an extended mean-field approximation, where vacuum quark fluctuations are included. At a given cutoff scale the model parameters are fixed by fitting vacuum…

High Energy Physics - Phenomenology · Physics 2016-08-17 Stefano Carignano , Michael Buballa , Wael Elkamhawy

The results for the elastic nucleon form factors and the electromagnetic transition amplitudes to the Delta(1232) resonance, obtained with the Hypercentral Constituent Quark Model with the inclusion of a meson cloud correction are briefly…

Nuclear Theory · Physics 2008-11-26 D. Y. Chen , Y. B. Dong , M. M. Giannini , E. Santopinto