Charged particle transverse momentum spectra in $pp$ collisions at $s = 0.9$ and 7 TeV
Charged particle transverse momentum spectra in $pp$ collisions at $s = 0.9$ and 7 TeV
The charged particle transverse momentum (pT) spectra are presented for pp collisions at s √ =0.9 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 μb−1 and 2.96 pb−1, respectively. Calorimeter-based high-transverse-energy triggers are employed to enhance the statistical reach of the high-pT measurements. The results are compared with leading and next-to-leading order QCD and with an empirical scaling of measurements at different collision energies using the scaling variable x T ≡2p T /s √ xT≡2pT/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 s √ =2.76 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.
Chatrchyan, Serguei
23ce6af5-bdd2-435c-92c8-9b1b71a261ee
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
August 2011
Chatrchyan, Serguei
23ce6af5-bdd2-435c-92c8-9b1b71a261ee
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
(2011)
Charged particle transverse momentum spectra in $pp$ collisions at $s = 0.9$ and 7 TeV.
Journal of High Energy Physics, 2011, [086].
(doi:10.1007/JHEP08(2011)086).
Abstract
The charged particle transverse momentum (pT) spectra are presented for pp collisions at s √ =0.9 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 μb−1 and 2.96 pb−1, respectively. Calorimeter-based high-transverse-energy triggers are employed to enhance the statistical reach of the high-pT measurements. The results are compared with leading and next-to-leading order QCD and with an empirical scaling of measurements at different collision energies using the scaling variable x T ≡2p T /s √ xT≡2pT/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 s √ =2.76 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.
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Published date: August 2011
Organisations:
Physics & Astronomy
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Local EPrints ID: 411294
URI: http://eprints.soton.ac.uk/id/eprint/411294
PURE UUID: 8d650d56-17c4-47b1-ad95-4f28bf6a82df
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Date deposited: 16 Jun 2017 16:32
Last modified: 26 Nov 2021 02:52
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Author:
Serguei Chatrchyan
Corporate Author: The CMS Collaboration
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