Model dependence of the electromagnetic corrections to lepton pair production in electron-positron collisions

1984 ◽  
Vol 23 (1) ◽  
pp. 31-38 ◽  
Author(s):  
M. Böhm ◽  
W. Hollik
Keyword(s):  
Pair Production ◽  
Lepton Pair ◽  
Lepton Pair Production ◽  
Model Dependence ◽  
Electron Positron ◽  
Positron Collisions

scholarly journals Experimental tests of quantum chromodynamics

1982 ◽  
Vol 304 (1482) ◽  
pp. 23-41 ◽  
Keyword(s):  
Pair Production ◽  
Quantum Chromodynamics ◽  
Momentum Transfer ◽  
Positron Annihilation ◽  
Experimental Tests ◽  
Lepton Pair ◽  
Lepton Pair Production ◽  
Electron Positron Annihilation ◽  
Electron Positron ◽  
Momentum Transfer Range

Experimental results from deep inelastic lepton—nucleon scattering, from electron - positron annihilation to hadrons and from massive lepton - pair production in hadron collisions, are discussed. The data obtained so far give qualitative support for Q C D . Serious quantitative comparisons are beset with difficulties, which arise first because of discrepancies between different experiments, and secondly because in addition to the perturbative effects that have been calculated theoretically, there are non-perturbative contributions for which there are no reliable estimates. These appear to be important in the momentum transfer range that can be investigated experimentally at present.

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
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