scholarly journals Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction

2009 ◽  
Vol 676 (1-3) ◽  
pp. 31-38 ◽  
Author(s):  
M. Alekseev ◽  
V.Yu. Alexakhin ◽  
Yu. Alexandrov ◽  
G.D. Alexeev ◽  
A. Amoroso ◽  
...  
Keyword(s):  
Open Charm ◽  
Spin Asymmetries ◽  
Double Spin

scholarly journals Leading and next-to-leading order gluon polarization in the nucleon and longitudinal double spin asymmetries from open charm muoproduction

2013 ◽  
Vol 87 (5) ◽  
Author(s):  
C. Adolph ◽  
M. G. Alekseev ◽  
V. Yu. Alexakhin ◽  
Yu. Alexandrov ◽  
G. D. Alexeev ◽  
...  
Keyword(s):  
Open Charm ◽  
Leading Order ◽  
Gluon Polarization ◽  
Spin Asymmetries ◽  
Double Spin

MEASUREMENT OF POLARIZED QUARK DISTRIBUTIONS AT HERMES

2003 ◽  
Vol 18 (08) ◽  
pp. 1185-1192
Author(s):  
◽  
STEFAN BERNREUTHER
Keyword(s):  
Cross Section ◽  
Kinematic Range ◽  
Spin Asymmetries ◽  
Double Spin ◽  
Hermes Experiment ◽  
Down Quark ◽  
Up Quark ◽  
Rich Detector ◽  
The Individual ◽  
Quark Flavors

The HERMES experiment has measured double spin asymmetries in the cross section for deep–inelastic scattering of longitudinally polarized positrons on longitudinally polarized 3 He (1995), 1 H (1996/97), and 2 D (1998) targets. A kinematic range of 0.023 < x < 0.6, and 1 GeV 2 < Q2 < 15 GeV 2 has been covered. From these asymmetries, based on inclusive and semi–inclusive measurements, polarized quark distributions are extracted as a function of x for up [Formula: see text] and down [Formula: see text] flavors as well as for valence and sea quarks. In the measured range, the up quark polarization is positive while the down quark polarization is negative. The sea quark polarization is compatible with zero. In this analysis all sea quark polarizations have been assumed to be flavor symmetric. Presently HERMES is analyzing a high statistics 2 D data sample taken in 1999-2000. For these data it is possible to identify pions and kaons with a RICH detector which was installed in 1998. This will enable an extraction of the individual sea quark flavors [Formula: see text], [Formula: see text], and [Formula: see text] without any symmetry assumptions.

scholarly journals Double spin asymmetries through QCD instantons

2014 ◽  
Vol 90 (11) ◽  
Author(s):  
Yachao Qian ◽  
Ismail Zahed
Keyword(s):  
Spin Asymmetries ◽  
Double Spin

scholarly journals Target and double spin asymmetries of deeply virtual π0 production with a longitudinally polarized proton target and CLAS

2017 ◽  
Vol 768 ◽  
pp. 168-173 ◽  
Author(s):  
A. Kim ◽  
H. Avakian ◽  
V. Burkert ◽  
K. Joo ◽  
W. Kim ◽  
...  
Keyword(s):  
Proton Target ◽  
Spin Asymmetries ◽  
Double Spin ◽  
Polarized Proton ◽  
Polarized Proton Target

scholarly journals First measurement of target and double spin asymmetries fore→p→→epπ0in the nucleon resonance region above theΔ(1232)

2008 ◽  
Vol 78 (4) ◽  
Author(s):  
A. S. Biselli ◽  
V. D. Burkert ◽  
M. J. Amaryan ◽  
G. Asryan ◽  
H. Avakian ◽  
...  
Keyword(s):  
Resonance Region ◽  
Nucleon Resonance ◽  
Spin Asymmetries ◽  
Double Spin ◽  
Nucleon Resonance Region

scholarly journals Longitudinal double-spin asymmetries for dijet production at intermediate pseudorapidity in polarized pp collisions at s=200  GeV

2018 ◽  
Vol 98 (3) ◽  
Author(s):  
J. Adam ◽  
L. Adamczyk ◽  
J. R. Adams ◽  
J. K. Adkins ◽  
G. Agakishiev ◽  
...  
Keyword(s):  
Pp Collisions ◽  
Dijet Production ◽  
Spin Asymmetries ◽  
Double Spin ◽  
200 Gev
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