CERN Accelerating science

Article
Report number arXiv:1709.07374 ; CERN-EP-2017-253
Title Transverse-momentum-dependent Multiplicities of Charged Hadrons in Muon-Deuteron Deep Inelastic Scattering
Related titleTransverse-momentum-dependent Multiplicities of Charged Hadrons in Muon-Deuteron Deep Inelastic Scattering
Author(s) COMPASS Collaboration  Visualizza tutti i 226 autori
Publication 2018-02-08
Imprint 19 Sep 2017
Number of pages 23
Note 28 pages, 20 figures
In: Phys. Rev. D 97 (2018) 032006
DOI 10.1103/PhysRevD.97.032006
Subject category nucl-ex ; Nuclear Physics - Experiment ; hep-ex ; Particle Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; COMPASS NA58
Free keywords QCD ; hard scattering ; experimental results ; TMDs ; Deep inelastic scattering ; hadron multiplicities ; unpolarised SIDIS
Abstract A semi-inclusive measurement of charged hadron multiplicities in deep inelastic muon scattering off an isoscalar target was performed using data collected by the COMPASS Collaboration at CERN. The following kinematic domain is covered by the data: photon virtuality Q2>1 (GeV/c)2, invariant mass of the hadronic system W>5 GeV/c2, Bjorken scaling variable in the range 0.003<x<0.4, fraction of the virtual photon energy carried by the hadron in the range 0.2<z<0.8, square of the hadron transverse momentum with respect to the virtual photon direction in the range 0.02 (GeV/c)2<PhT2<3 (GeV/c)2. The multiplicities are presented as a function of PhT2 in three-dimensional bins of x, Q2, z and compared to previous semi-inclusive measurements. We explore the small-PhT2 region, i.e. PhT2<1 (GeV/c)2, where hadron transverse momenta are expected to arise from non-perturbative effects, and also the domain of larger PhT2, where contributions from higher-order perturbative QCD are expected to dominate. The multiplicities are fitted using a single-exponential function at small PhT2 to study the dependence of the average transverse momentum PhT2 on x, Q2 and z. The power-law behaviour of the multiplicities at large PhT2 is investigated using various functional forms. The fits describe the data reasonably well over the full measured range.
Copyright/License Preprint: © 2017-2024 CERN (License: CC-BY-4.0)



Corresponding record in: Inspire
Email contact: oleg.denisov@cern.ch


 Record creato 2017-09-19, modificato l'ultima volta il 2024-07-20


Article from SCOAP3:
Scarica documentoPDF
(file aggiuntivi)
Testo completo:
CERN-EP-2017-253 - Scarica documentoPDF
arXiv:1709.07374 - Scarica documentoPDF
(file aggiuntivi)
  • Send to ScienceWise.info