Testing the Spin of the Gluon in Large-Transverse-Momentum Lepton-Pair Production

1980 ◽  
Vol 45 (17) ◽  
pp. 1382-1385 ◽  
Author(s):  
Porter W. Johnson ◽  
Wu-ki Tung
Keyword(s):  
Transverse Momentum ◽  
Pair Production ◽  
Lepton Pair ◽  
Large Transverse Momentum ◽  
Lepton Pair Production

VECTOR MESON-HADRON COLLISIONS: LARGE INVARIANT MASS AND TRANSVERSE MOMENTUM LEPTON PAIR PRODUCTION

1994 ◽  
Vol 09 (29) ◽  
pp. 5077-5095 ◽  
Author(s):  
SHAHIN S. AGAEV
Keyword(s):  
Transverse Momentum ◽  
Vector Meson ◽  
Pair Production ◽  
Invariant Mass ◽  
Perturbative Qcd ◽  
General Expression ◽  
Lepton Pair ◽  
Proton Collision ◽  
Lepton Pair Production

In the framework of factorized perturbative QCD, higher twist mesonic binding effects in lepton pair production in vector meson-hadron collisions are investigated. A general expression for the higher twist contributions is derived. As an example, these contributions are calculated in the case of the ρ meson-proton collision and comparisons are made to leading twist ones. It is shown that the higher twist contributions induced by a transversely polarized ρT meson are large for all values of the dilepton transverse momentum pT (2 GeV≤pT≤6 GeV). In the kinematic regimes τ=Q2/S→1 or xF→1, the higher twist corrections induced by both ρT and ρL exceed considerably the leading ones. The Drell-Yan processes with dilepton rapidity y>0 are especially preferable for the observation of these effects.

Large transverse momentum lepton pair production at the Large Hadron Collider

Open Physics ◽  
2011 ◽  
Vol 9 (6) ◽  
Author(s):  
Rui-tao Yin ◽  
Yong-ping Fu ◽  
Yun-de Li
Keyword(s):  
Transverse Momentum ◽  
Large Hadron Collider ◽  
Single Photon ◽  
Hadron Collider ◽  
Heavy Ion ◽  
Lepton Pair ◽  
Large Transverse Momentum ◽  
Lepton Pairs ◽  
Lepton Pair Production ◽  
Photon Process

AbstractWe study the large transverse momentum distribution of lepton pairs produced in heavy-ion collisions, making use of the perturbative QCD. Referring to the calculation of the parton-parton production process into lepton pairs at the Relativistic Heavy Ion Collider (RHIC), the production of lepton pairs at large transverse momentum is extended to the Large Hadron Collider (LHC). The contribution of the parton-parton production process into lepton pairs in Pb-Pb collisions at the LHC is calculated, including the complete processes at large transverse momentum. Lepton pair production with the direct single photon process and the resolved single photon process are considered and confirmed to be significant at the LHC.

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
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