scholarly journals Spin asymmetries and correlations inΛ-pair production through the radiative return method

2007 ◽  
Vol 75 (7) ◽  
Author(s):  
Henryk Czyż ◽  
Agnieszka Grzelińska ◽  
Johann H. Kühn
Keyword(s):  
Pair Production ◽  
Spin Asymmetries ◽  
Radiative Return ◽  
Return Method

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.

Single-spin asymmetries in muon pair production

1992 ◽  
Vol 45 (7) ◽  
pp. 2323-2348 ◽  
Author(s):  
Robert D. Carlitz ◽  
Raymond S. Willey
Keyword(s):  
Pair Production ◽  
Muon Pair ◽  
Spin Asymmetries ◽  
Single Spin ◽  
Single Spin Asymmetries ◽  
Muon Pair Production

Double Transverse-Spin Asymmetries for Small-Q[sub T] Drell-Yan Pair Production in pp̄ Collisions

2009 ◽  
Author(s):  
Hiroyuki Kawamura ◽  
Kazuhiro Tanaka ◽  
Donald G. Crabb ◽  
Yelena Prok ◽  
Matt Poelker ◽  
...  
Keyword(s):  
Pair Production ◽  
Transverse Spin ◽  
Spin Asymmetries

QED corrections in the radiative return method during measurement of the e + e −→π+π− cross-section below 1 GeV

JETP Letters ◽  
2003 ◽  
Vol 78 (2) ◽  
pp. 51-56
Author(s):  
M. I. Konchatnij ◽  
N. P. Merenkov ◽  
O. N. Shekhovtzova
Keyword(s):  
Cross Section ◽  
Radiative Return ◽  
Return Method

scholarly journals Narrow resonances studies with the radiative return method

2010 ◽  
Vol 81 (9) ◽  
Author(s):  
Henryk Czyż ◽  
Agnieszka Grzelińska ◽  
Johann H. Kühn
Keyword(s):  
Radiative Return ◽  
Return Method
Sign in / Sign up

Export Citation Format

Share Document