scholarly journals Spin asymmetries for vector boson production in polarizedp+pcollisions

2016 ◽  
Vol 93 (1) ◽  
Author(s):  
Jin Huang ◽  
Zhong-Bo Kang ◽  
Ivan Vitev ◽  
Hongxi Xing
Keyword(s):  
Vector Boson ◽  
Boson Production ◽  
Spin Asymmetries

scholarly journals Global analysis of the Sivers functions at NLO+NNLL in QCD

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Miguel G. Echevarria ◽  
Zhong-Bo Kang ◽  
John Terry
Keyword(s):  
Pair Production ◽  
Global Analysis ◽  
Vector Boson ◽  
Lepton Pair ◽  
Transverse Spin ◽  
Dglap Evolution ◽  
Spin Asymmetries ◽  
Lepton Pair Production ◽  
Asymmetry Data ◽  
The Impact

Abstract We perform global fit to the quark Sivers function within the transverse momentum dependent (TMD) factorization formalism in QCD. We simultaneously fit Sivers asymmetry data from Semi-Inclusive Deep Inelastic Scattering (SIDIS) at COMPASS, HERMES, and JLab, from Drell-Yan lepton pair production at COMPASS, and from W/Z boson at RHIC. This extraction is performed at next-to-leading order (NLO) and next-to-next-to leading logarithmic (NNLL) accuracy. We find excellent agreement between our extracted asymmetry and the experimental data for SIDIS and Drell-Yan lepton pair production, while tension arises when trying to describe the spin asymmetries of W/Z bosons at RHIC. We carefully assess the situation, and we study in details the impact of the RHIC data and their implications through different ways of performing the fit. In addition, we find that the quality of the description of W/Z vector boson asymmetry data could be strongly sensitive to the DGLAP evolution of Qiu-Sterman function, besides the usual TMD evolution. We present discussion on this and the implications for measurements of the transverse-spin asymmetries at the future Electron Ion Collider.

scholarly journals Precision studies of vector-boson production with heavy quarks at the LHC: the case of $Z + b$ jet.

2018 ◽  
Author(s):  
Laura Reina ◽  
Diogenes Figueroa ◽  
Steve Honeywell ◽  
Seth Quackenbush ◽  
Christian Reuschle ◽  
...  
Keyword(s):  
Vector Boson ◽  
Heavy Quarks ◽  
Boson Production
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