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QCD Evolution 2018

May 20 – 24, 2018
Drury Plaza Hotel
US/Mountain timezone

Contribution List

56 out of 56 displayed
  1. 1. Welcome
    Dr Ivan Vitev (LANL)
    5/20/18, 8:30 AM
  2. 0. Collinear QCD as a starting point
    Piet Mulders (Vrije Universiteit Amsterdam, NIKHEF)
    5/20/18, 8:40 AM
  3. 2. First extraction of transversity from a global analysis of data on lepton-hadron scattering and hadronic collisions
    Dr Marco Radici (University of Pavia)
    5/20/18, 9:10 AM
    We present the first extraction of the transversity distribution based on the global analysis of pion-pair production in deep-inelastic scattering and in proton-proton collisions with one transversely polarized proton. The extraction relies on the knowledge of di-hadron fragmentation functions, which are taken from the analysis of electron-positron annihilation data. For the first time, the...
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  4. 3. TMDs in proton-proton collisions
    Maarten Buffing (UCLA)
    5/20/18, 9:40 AM
  5. 4. Double-scale evolution: consequences and ambiguities
    Alexey Vladimirov (Regensburg University)
    5/20/18, 10:30 AM
  6. 5. Phenomenology of TMDs
    Alexei Prokudin (JLab)
    5/20/18, 11:00 AM
    The formulation of transverse momentum dependent distributions derived from the factorization of differential cross section allows a systematical analysis of polarized distributions. We consider in particular the case of twist-3 distributions and explore the properties in the matching with their collinear integrated parton distributions.
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  7. 6. Extract hadron's partonic structure from lattice QCD calculations
    Dr Jianwei Qiu (Jefferson Lab)
    5/20/18, 11:30 AM
  8. 7. Power corrections to TMD factorization for particle production
    Prof. Ian Balitsky (JLab/ODU)
    5/20/18, 2:00 PM
    A typical factorization formula for production of a particle with a small transverse momentum in hadron-hadron collisions is given by a convolution of two TMD parton densities with cross section of production of the final particle by the two partons. For practical applications at a given transverse momentum, though, one should estimate at what momenta the power corrections to the TMD...
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  9. 8. All-opacity gluon spectrum for jet physics at the EIC
    Dr Matthew Sievert (Brookhaven National Laboratory)
    5/20/18, 2:30 PM
  10. 9. Semi-inclusive Kaon production at low scales
    Mr Juan Guerrero (Hampton University/Jefferson Lab)
    5/20/18, 3:00 PM
  11. 10. TMDs at small-x: an operator treatment
    Prof. Yuri Kovchegov (The Ohio State University)
    5/20/18, 4:00 PM
  12. 11. When gluons go odd: how classical gluon fields generate odd azimuthal harmonics for the two-gluon correlation function in high-energy collisions
    Dr Vladimir Skokov (Western Michigan University)
    5/20/18, 4:30 PM
  13. 12. Inclusive prompt photon production in e + A DIS at small x as a probe of gluon saturation
    Kaushik Roy (Stony Brook University)
    5/20/18, 5:00 PM
    We present a first computation of the differential cross-section for in- clusive prompt-photon production in DIS to next-to-leading order (NLO) in αS at small-x within the framework of the Color Class condensate (CGC) [1]. The computation is performed to next-to-leading-log x (NLLx) accuracy and resums all higher twist contributions within the CGC effec- tive theory. Our work is within the...
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  14. 13. Nucleon 3D imaging and science program with the 12 GeV Upgrade
    Latifa Elouadrhiri (Jefferson Lab)
    5/21/18, 8:30 AM
  15. 14. Large transverse momentum in semi-inclusive deeply inelastic scattering beyond the lowest order
    Nobuo Sato (UConn)
    5/21/18, 9:00 AM
  16. 15. Heavy quark jet substructure
    Dr varun vaidya (LANL)
    5/21/18, 9:30 AM
  17. 16. Lepton angular distributions in Drell-Yan process
    Jen-Chieh Peng (University of Illinois at Urbana-Champaign)
    5/21/18, 10:30 AM
    High precision data of dilepton angular distributions in ??/Z production were reported recently by the CMS and ATLAS Collaboration covering a broad range of the dilepton transverse momentum, qT, up to ?300GeV. Pronounced qT dependencies of the ? and ? parameters, characterizing the cos2? and cos2? angular distributions, were found. Violation of the Lam?Tung relation was also clearly observed....
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  18. 17. Measurements of light-quark hadronization in e+e- annihilation
    Gunar Schnell (University of the Basque Country)
    5/21/18, 11:00 AM
  19. 18. COMPASS spin program: recent results and plans
    Bakur Parsamyan (CERN)
    5/21/18, 11:30 AM
  20. 19. Lambda production in electron-positron annihilation
    Dr Marc Schlegel (University of Tubingen)
    5/21/18, 2:00 PM
  21. 20. Polarized TMDs, twist-3 functions, and the CSS formalism
    Daniel Pitonyak (Penn State Berks)
    5/21/18, 2:30 PM
  22. 21. Color unwound — Glauber gluons and factorisation in azimuthal asymmetries in Drell-Yan
    Jonathan Gaunt (CERN)
    5/21/18, 3:00 PM
  23. 22. Progress on Pion Parton Distribution Functions from Hadronic Lattice Cross Sections
    Dr David Richards (Jefferson Lab)
    5/21/18, 4:00 PM
  24. 23. SIDIS in Wandzura-Wilczek-type approximation
    Saman Bastami (University of Connecticut)
    5/21/18, 4:30 PM
  25. 31. Twist-3 Generalized Parton Distributions
    Fatma Aslan (NMSU)
    5/21/18, 5:00 PM
    Twist-3 Generalized Parton Distributions (GPDs) may provide an alternative source of information on quark orbital angular momentum. Additionally, twist-3 GPDs embody information on the spatial distribution of quark-gluon correlations. Spectator models are used to study general features that appear in twist-3 GPDs. We find in 1 loop calculations/spectator models that twist-3 generalized parton...
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  26. 25. Lattice Calculation of PDF from LaMET at Physical Pion Mass with Large Nucleon Momentum
    Yong Zhao (Massachusetts Institute of Technology)
    5/22/18, 9:00 AM
    We present a lattice-QCD calculation of the unpolarized isovector parton distribution func- tion (PDF) using ensembles at the physical pion mass with the large proton boost momentum Pz ? {2.2, 3.0} GeV within the framework of large-momentum effective theory (LaMET). In contrast with our previous physical-pion PDF result, we increase the statistics significantly, double the boost momentum,...
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  27. 26. Contributions of up and down quarks to TMD observables from Lattice QCD
    Michael Engelhardt (New Mexico State University)
    5/22/18, 9:30 AM
  28. 27. Evolution of pseudo-PDFs
    Anatoly Radyushkin (ODU/JLab)
    5/22/18, 10:30 AM
    We discuss the structure of parton pseudo-distributions, their evolution and relation to parton quasi-distributions.
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  29. 28. Pseudo Distributions from Lattice QCD
    Joseph Karpie (College of William and Mary)
    5/22/18, 11:00 AM
    The Direct calculation of x-dependent parton distribution functions (PDFs) are not possible using ab initio Euclidean-space Lattice QCD, due to their definitions in terms of light-cone coordinates. I present the recent Lattice QCD calculation of pseudo PDFs, a Lorentz invariant generalization of light cone PDFs. These Lorentz invariant functions can be calculated on a Euclidean lattice and...
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  30. 29. Nuclear Quark and Gluon Structure from Lattice QCD
    Michael Wagman (MIT)
    5/22/18, 11:30 AM
  31. 30. TMD sensitive jet observables
    Dr Felix Ringer (Los Alamos National Laboratory)
    5/23/18, 8:30 AM
  32. 32. Jet substructure measurements at the LHC and EIC
    Kyle Lee (Stony Brook University)
    5/23/18, 9:00 AM
    In this talk, I will develop the theoretical framework of jet substructure measurements in the semi-inclusive jet production. The talk will mainly be focused on the recent work on jet mass measurements, with and without grooming, as a particular substructure of interest. I will discuss factorization, nonperturbative effects, and joint resummations of several classes of logarithmic corrections...
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  33. 33. The E906/SeaQuest Fixed-Target Dimuon Experiment at Fermilab: Recent Results and Prospects
    Kun Liu (LANL)
    5/23/18, 9:30 AM
  34. 34. Inverting the mass hierarchy of jet quenching effects with prompt b-jet substructure
    Mr Haitao Li (LANL)
    5/23/18, 10:30 AM
    The mass of heavy quarks, such as charm and bottom, plays an important role in the formation of parton showers. This effect is apparently not well understood when parton showers evolve in a strongly interacting quark-gluon plasma. We propose a new experimental measurement in relativistic heavy ion collisions, based on a two-prong subjet structure inside a reconstructed heavy flavor jet, ...
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  35. 35. Quarkonium production at low transverse momentum with NRQCD+SCET
    Yiannis Makris (LANL)
    5/23/18, 11:00 AM
    We consider the transverse momentum spectrum of quarkonium produced in hadronic collisions. For traverse momentum parametrically smaller compared to its mass, in the central rapidity region, the quarkonium is produced nearly at rest and other particles in the event can only be soft and/or collinear along the beam direction. We use non-relativistic QCD (NRQCD) to describe the dynamics of the...
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  36. 36. Transverse Force Tomography
    Prof. Matthias Burkardt (NMSU)
    5/23/18, 11:30 AM
  37. 37. Exploring the twist-3 structure of hadrons
    Ignazio Scimemi (Universidad Complutense Madrid)
    5/23/18, 2:00 PM
  38. 38. Quarkonium production: from JLab to an EIC
    Dr Sylvester Joosten (Temple University)
    5/23/18, 2:30 PM
  39. 39. Cold QCD at RHIC: Recent Results and Prospects
    Oleg Eyser (Brookhaven National Lab.)
    5/23/18, 3:00 PM
  40. 40. (Towards a quantitative study of) Flavour Effects on the determination of the W Mass
    Giuseppe Bozzi (Università degli Studi di Pavia)
    5/23/18, 4:00 PM
    I will present a brief summary of previous studies estimating the size of theoretical uncertainties for the determination of the W mass, and I will show recent updates including flavour-dependent TMD effects.
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  41. 41. Examining semi-inclusive electron-positron annihilation at large transverse momentum
    Eric Moffat (Old Dominion University)
    5/23/18, 4:30 PM
  42. 43. Accessing gluon TMDs in heavy quarkonium production at EIC
    Asmita Mukherjee (IIT Bombay)
    5/24/18, 8:30 AM
  43. 44. Energy-momentum tensor, forces in the nucleon, and applications
    Peter Schweitzer (University of Connecticut)
    5/24/18, 9:00 AM
  44. 45. The QCD Energy Momentum Tensor in Spin 0, 1/2, and 1 Systems
    Prof. simonetta liuti (university of virginia)
    5/24/18, 9:30 AM
  45. 46. Collinear factorization and intrinsic transverse momentum in low-energy Drell-Yan
    Fulvio Piacenza (Pavia University)
    5/24/18, 10:30 AM
    In this talk, we discuss the transverse momentum distribution of Drell-Yan lepton pairs in fixed-target Drell-Yan experiments. We show that fixed-order theory underestimates data at large qT, by an amount that cannot be explained by perturbative truncation errors nor PDF uncertainties. We consider a modification of the standard collinear formalism that includes the effect of intrinsic...
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  46. 47. A numerical study of TMDs using Ogata's formula
    Terry John (UCLA)
    5/24/18, 11:00 AM
    Twist-3 Generalized Parton Distributions (GPDs) may provide an alternative source of information on quark orbital angular momentum. Additionally, twist-3 GPDs embody information on the spatial distribution of quark-gluon correlations. Spectator models are used to study general features that appear in twist-3 GPDs. We find in 1 loop calculations/spectator models that twist-3 generalized parton...
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  47. 48. Twist-2 transverse momentum distributions at NNLO in QCD
    Daniel Gutierrez-Reyes (Universidad Complutense de Madrid)
    5/24/18, 11:30 AM
    The factorization theorem for DY and semi-inclusive DIS holds for all leading twist transverse momentum distributions. However a QCD perturbative calculation shows several important characteristics of spin-dependent distributions. We consider all the different spin-dependent distributions which can be matched onto integrated twist-2 functions, focusing on the Helicity, Transversity and...
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  48. 49. The Physics Program at the Future Electron-Ion Collider at BNL
    Matthias Perdekamp (UIUC)
    5/24/18, 2:00 PM
  49. 50. Realizing the Electron-Ion Collider at Jefferson Lab
    Dr Markus Diefenthaler (Jefferson Lab)
    5/24/18, 2:30 PM
  50. 51. Gluon transversity and top pair production spin correlations
    Prof. Gary Goldstein (Tufts University)
    5/24/18, 3:00 PM
    Gluon fusion is the primary source of top-antitop pair production at the LHC. The spin dependences of proton gluon distributions impact the spin correlations of the top pairs. Decays of top pairs through different channels produce a variety of correlations among the decay products - single particles and jets. Combinations of the gluon distributions, either polarized or unpolarized, can be...
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  51. 53. Probing the seaquark sivers function with the E1039 polarized Drell-Yan experiment
    Xuan Li (LANL)
    5/24/18, 4:00 PM
  52. 55. Single transverse-spin asymmetry in polarized lambda production
    Dr Shinsuke Yoshida (Los Alamos)
    5/24/18, 4:30 PM
  53. 54. Theory developments for double parton scattering
    Markus Diehl (DESY)
    5/24/18, 5:00 PM
  54. 52. Realizing the Electron-Ion Collider at Jefferson Lab
    Dr Markus Diefenthaler (Jefferson Lab)
  55. 24. TBA
    Prof. Xiangdong Ji (U. Maryland)
  56. 42. Transverse Force Tomography
    Prof. Matthias Burkardt (NMSU)