scholarly journals Lepton-pair production in dipion τ lepton decays

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
J. L. Gutiérrez Santiago ◽  
G. López Castro ◽  
P. Roig
Keyword(s):  
Pair Production ◽  
Lepton Pair ◽  
Lepton Pair Production ◽  
Lepton Decays

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 Heavy lepton pair production in nucleus–nucleus collisions at LHC energy – a case study

2012 ◽  
Vol 889 ◽  
pp. 1-7
Author(s):  
Jan-e Alam ◽  
Bedangadas Mohanty ◽  
Sarbani Majumder ◽  
Sanjay K. Ghosh ◽  
Rajarshi Ray
Keyword(s):  
Pair Production ◽  
Lepton Pair ◽  
Heavy Lepton ◽  
Lepton Pair Production

scholarly journals Low-mass lepton-pair production in p-Be collisions at 450 GeV/c

1995 ◽  
Vol 68 (1) ◽  
pp. 47-64 ◽  
Author(s):  
T. Åkesson ◽  
S. Almehed ◽  
A. L. S. Angelis ◽  
J. Antos ◽  
H. Atherton ◽  
...  
Keyword(s):  
Pair Production ◽  
Lepton Pair ◽  
Lepton Pair Production ◽  
Low Mass

Lepton pair production in hadron-hadron collisions from an explicit parton model

1975 ◽  
Vol 92 (4) ◽  
pp. 413-426 ◽  
Author(s):  
G. Altarelli ◽  
N. Cabibbo ◽  
L. Maiani ◽  
R. Petronzio
Keyword(s):  
Pair Production ◽  
Parton Model ◽  
Lepton Pair ◽  
Lepton Pair Production

scholarly journals Lepton pair production in heavy-ion collisions in perturbation theory

2002 ◽  
Vol 66 (4) ◽  
Author(s):  
E. Bartoš ◽  
S. R. Gevorkyan ◽  
E. A. Kuraev ◽  
N. N. Nikolaev
Keyword(s):  
Perturbation Theory ◽  
Pair Production ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Lepton Pair ◽  
Lepton Pair Production ◽  
Ion Collisions
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