scholarly journals Inclusive production of single hadrons with finite transverse momenta in deep-inelastic scattering at next-to-leading order

2005 ◽  
Vol 711 (1-2) ◽  
pp. 345-366 ◽  
Author(s):  
B.A. Kniehl ◽  
G. Kramer ◽  
M. Maniatis
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Inclusive Production ◽  
Leading Order

scholarly journals COMPASS Measurement of Pion and Kaon Multiplicities and Extraction of Quark Fragmentation Functions into Pions

2016 ◽  
Vol 40 ◽  
pp. 1660027
Author(s):  
Fabienne Kunne
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Leading Order ◽  
Data Set ◽  
Quark Fragmentation ◽  
Z Domain ◽  
Fragmentation Functions

We present preliminary COMPASS results on pion and kaon multiplicities produced in semi inclusive deep inelastic scattering of 160[Formula: see text]GeV muons off an isoscalar ([Formula: see text]LiD) target. The results constitute an impressive data set of more than 400 points in p and 400 in K, covering a large x,Q[Formula: see text] and z domain in a fine binning, which will be used in future QCD fits at next to leading order to extract quark fragmentation functions. We show results of a first leading order fit performed to extract the favored and unfavored quark fragmentation functions into pions D[Formula: see text] and D[Formula: see text].

scholarly journals CAN POLARIZED DRELL-YAN SHED MORE LIGHT ON THE PROTON SPIN?

1992 ◽  
Vol 07 (29) ◽  
pp. 2695-2702 ◽  
Author(s):  
PRAKASH MATHEWS ◽  
V. RAVINDRAN
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Parton Distribution ◽  
Factorization Method ◽  
Distribution Functions ◽  
Proton Spin ◽  
Leading Order ◽  
Parton Distribution Functions ◽  
First Moment ◽  
Polarized Deep Inelastic Scattering

We analyze polarized Drell-Yan process using the factorization method and derive operator definitions for polarized parton distribution functions. We demonstrate that a factorization analogous to that in the unpolarized Drell-Yan case holds in this process. We study the leading order gluonic contribution to the first moment of polarized Drell-Yan function and show that it is consistent with the results obtained from polarized deep inelastic scattering.

scholarly journals PROTON AND PHOTON STRUCTURE

2002 ◽  
Vol 17 (23) ◽  
pp. 3171-3184
Author(s):  
MARTIN ERDMANN
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Strong Coupling ◽  
Leading Order ◽  
Coupling Constant ◽  
Major Step ◽  
Proton Structure ◽  
Momentum Distributions ◽  
Experimental Errors ◽  
Universal Properties

The increasing precision of the measurements on the proton structure and an improved treatment of the correlated systematic experimental errors constitute a major step forward in our understanding of the flavour decomposition of the proton and the momentum distributions of the various flavours. Together with theoretical progress on the next-to-next-to-leading order QCD corrections to deep inelastic scattering processes, the proton measurements already imply a new level of precision for the strong coupling constant αs. The progress in the measurements on the quantum fluctuations of the photon allows questions on the universal properties of hadronic structures to be addressed.

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