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Title: Charged particle transverse momentum spectra in pp collisions at sqrt(s) = 0.9 and 7 TeV

Abstract

The charged particle transverse momentum (pT) spectra are presented for pp collisions at sqrt(s)=0.9 and 7 TeV. The data samples were collected with the CMS detector at the LHC and correspond to integrated luminosities of 231 inverse microbarns and 2.96 inverse picobarns, respectively. Calorimeter-based high-transverse-energy triggers are employed to enhance the statistical reach of the high-pT measurements. The results are compared with both leading-order QCD and with an empirical scaling of measurements at different collision energies using the scaling variable xT = 2 pT/sqrt(s) over the pT range up to 200 GeV/c. Using a combination of xT scaling and direct interpolation at fixed pT, a reference transverse momentum spectrum at sqrt(s)=2.76 TeV is constructed, which can be used for studying high-pT particle suppression in the dense QCD medium produced in heavy-ion collisions at that centre-of-mass energy.

Authors:
 [1];
  1. Yerevan Physics Inst. (Armenia)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
CMS Collaboration
OSTI Identifier:
1155741
Report Number(s):
FERMILAB-PUB-11-741-CMS; CERN-PH-EP-2011-049
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1104.3547
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Volume: 2011; Journal Issue: 8; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Chatrchyan, Serguei, and et al. Charged particle transverse momentum spectra in pp collisions at sqrt(s) = 0.9 and 7 TeV. United States: N. p., 2011. Web. doi:10.1007/JHEP08(2011)086.
Chatrchyan, Serguei, & et al. Charged particle transverse momentum spectra in pp collisions at sqrt(s) = 0.9 and 7 TeV. United States. doi:10.1007/JHEP08(2011)086.
Chatrchyan, Serguei, and et al. Mon . "Charged particle transverse momentum spectra in pp collisions at sqrt(s) = 0.9 and 7 TeV". United States. doi:10.1007/JHEP08(2011)086. https://www.osti.gov/servlets/purl/1155741.
@article{osti_1155741,
title = {Charged particle transverse momentum spectra in pp collisions at sqrt(s) = 0.9 and 7 TeV},
author = {Chatrchyan, Serguei and et al.},
abstractNote = {The charged particle transverse momentum (pT) spectra are presented for pp collisions at sqrt(s)=0.9 and 7 TeV. The data samples were collected with the CMS detector at the LHC and correspond to integrated luminosities of 231 inverse microbarns and 2.96 inverse picobarns, respectively. Calorimeter-based high-transverse-energy triggers are employed to enhance the statistical reach of the high-pT measurements. The results are compared with both leading-order QCD and with an empirical scaling of measurements at different collision energies using the scaling variable xT = 2 pT/sqrt(s) over the pT range up to 200 GeV/c. Using a combination of xT scaling and direct interpolation at fixed pT, a reference transverse momentum spectrum at sqrt(s)=2.76 TeV is constructed, which can be used for studying high-pT particle suppression in the dense QCD medium produced in heavy-ion collisions at that centre-of-mass energy.},
doi = {10.1007/JHEP08(2011)086},
journal = {Journal of High Energy Physics (Online)},
issn = {1029-8479},
number = 8,
volume = 2011,
place = {United States},
year = {2011},
month = {8}
}