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- National Institute for Subatomic PhysicsNL537 papers
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26 papers · 1 filter
Bounds on transverse momentum dependent distribution and fragmentation functions
A. Bacchetta, M. Boglione, A. Henneman +1
We give bounds on the distribution and fragmentation functions that appear at leading order in deep inelastic 1-particle inclusive leptoproduction or in Drell-Yan processes. These…
Reassessment of the Collins Mechanism for Single-spin Asymmetries and the behavior of Delta d(x) at large x
M. Boglione, E. Leader
It is shown that the Collins mechanism explanation of the transverse single-spin asymmetries in p^{\uparrow} p -> πX leads to a transversely polarized d quark density Delta_T d(x)…
Measurement of Longitudinal Spin Transfer to Lambda Hyperons in Deep-Inelastic Lepton Scattering
HERMES Collaboration, A. Airapetian
Spin transfer in deep-inelastic Lambda electroproduction has been studied with the HERMES detector using the 27.6 GeV polarized positron beam in the HERA storage ring. For an avera…
Nuclear Effects on R = sigma_L / sigma_T in Deep-Inelastic Scattering
K. Ackerstaff
Cross section ratios for deep-inelastic scattering from 14N and 3He with respect to 2H have been measured by the HERMES experiment at DESY using a 27.5 GeV positron beam. The data…
Observation of a Single-Spin Azimuthal Asymmetry in Semi-Inclusive Pion Electro-Production
A. Airapetian
Single-spin asymmetries for semi-inclusive pion production in deep-inelastic scattering have been measured for the first time. A significant target-spin asymmetry of the distributi…
Comment on the "Coupling Constant and Quark Loop Expansion for Corrections to the Valence Appeoximation" by Lee and Weingarten
M. Boglione, M. R. Pennington
Lee and Weingarten have recently criticized our calculation of quarkonium and glueball scalars as being "incomplete" and "incorrect". Here we explain the relation of our calculatio…