Measurement of particle production and inclusive differential cross sections in pp̅ collisions at √s=1.96  TeV

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Aaltonen , T , Mehtälä , P , Orava , R , Mäki , T , Saarikko , H & Österberg , K 2009 , ' Measurement of particle production and inclusive differential cross sections in pp̅ collisions at √s=1.96  TeV ' , Physical Review D : Particles, Fields, Gravitation and Cosmology , vol. 79 , no. 11 , pp. 112005 . https://doi.org/10.1103/PhysRevD.79.112005

Title: Measurement of particle production and inclusive differential cross sections in pp̅ collisions at √s=1.96  TeV
Alternative title: Measurement of Particle Production and Inclusive Differential Cross Sections in pbar{p} Collisions at sqrt{s}=1.96 TeV
Author: Aaltonen, Timo; Mehtälä, Petteri; Orava, Risto; Mäki, Tuula; Saarikko, Heimo; Österberg, Kenneth
Contributor organization: Helsinki Institute of Physics
Particle Physics and Astrophysics
Department of Physics
Date: 2009
Language: eng
Number of pages: 22
Belongs to series: Physical Review D : Particles, Fields, Gravitation and Cosmology
ISSN: 1550-7998
DOI: https://doi.org/10.1103/PhysRevD.79.112005
URI: http://hdl.handle.net/10138/23661
Abstract: We report a set of measurements of particle production in inelastic pbar{p} collisions collected with a minimum-bias trigger at the Tevatron Collider with the CDF II experiment. The inclusive charged particle transverse momentum differential cross section is measured, with improved precision, over a range about ten times wider than in previous measurements. The former modeling of the spectrum appears to be incompatible with the high particle momenta observed. The dependence of the charged particle transverse momentum on the event particle multiplicity is analyzed to study the various components of hadron interactions. This is one of the observable variables most poorly reproduced by the available Monte Carlo generators. A first measurement of the event transverse energy sum differential cross section is also reported. A comparison with a Pythia prediction at the hadron level is performed. The inclusive charged particle differential production cross section is fairly well reproduced only in the transverse momentum range available from previous measurements. At higher momentum the agreement is poor. The transverse energy sum is poorly reproduced over the whole spectrum. The dependence of the charged particle transverse momentum on the particle multiplicity needs the introduction of more sophisticated particle production mechanisms, such as multiple parton interactions, in order to be better explained.We report a set of measurements of particle production in inelastic pp̅ collisions collected with a minimum-bias trigger at the Tevatron Collider with the CDF II experiment. The inclusive charged particle transverse momentum differential cross section is measured, with improved precision, over a range about ten times wider than in previous measurements. The former modeling of the spectrum appears to be incompatible with the high particle momenta observed. The dependence of the charged particle transverse momentum on the event particle multiplicity is analyzed to study the various components of hadron interactions. This is one of the observable variables most poorly reproduced by the available Monte Carlo generators. A first measurement of the event transverse energy sum differential cross section is also reported. A comparison with a pythia prediction at the hadron level is performed. The inclusive charged-particle differential production cross section is fairly well reproduced only in the transverse momentum range available from previous measurements. At higher momentum the agreement is poor. The transverse energy sum is poorly reproduced over the whole spectrum. The dependence of the charged particle transverse momentum on the particle multiplicity needs the introduction of more sophisticated particle production mechanisms, such as multiple parton interactions, in order to be better explained.
Description: 21 pages, 10 figures
Subject: hep-ex
114 Physical sciences
Peer reviewed: Yes
Usage restriction: restrictedAccess


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