Measurement of charm production at central rapidity in proton-proton collisions at sqrt(s) = 2.76 TeV

B. Abelev; Hans Bøggild; Ian Bearden; Christian Holm Christensen; Hans Hjersing Dalsgaard; Kristjan Herlache Gulbrandsen; Jens Jørgen Gaardhøje; Børge Svane Nielsen; Casper Nygaard; Carsten Søgaard

doi:10.1007/JHEP07(2012)191

Measurement of charm production at central rapidity in proton-proton collisions at sqrt(s) = 2.76 TeV

B. Abelev, Hans Bøggild, Ian Bearden, Christian Holm Christensen, Hans Hjersing Dalsgaard, Kristjan Herlache Gulbrandsen, Jens Jørgen Gaardhøje, Børge Svane Nielsen, Casper Nygaard, Carsten Søgaard

Experimental Particle Physics

115 Citations (Scopus)

Abstract

The p_t-differential production cross sections of the prompt (B feed-down subtracted) charmed mesons D0, D+, and D*+ in the rapidity range |y| < 0.5, and for transverse momentum 1 < p_t < 12 GeV/c, were measured in proton-proton collisions at √s = 2.76 TeV with the ALICE detector at the Large Hadron Collider. The analysis exploited the hadronic decays D⁰ → K^-π⁺, D⁺ → K^-π⁺π⁺, D^*+ → D⁰π⁺, and their charge conjugates, and was performed on a L_int = 1.1 nb^-1 event sample collected in 2011 with a minimum-bias trigger. The total charm production cross section at √s = 2.76 TeV and at 7 TeV was evaluated by extrapolating to the full phase space the p_t-differential production cross sections at √s = 2.76 TeV and our previous measurements at √s = 7 TeV. The results were compared to existing measurements and to perturbative-QCD calculations. The fraction of cd D mesons produced in a vector state was also determined.

Original language	English
Journal	Journal of High Energy Physics (Online)
Volume	2012
Issue number	7
Pages (from-to)	191
ISSN	1126-6708
DOIs	https://doi.org/10.1007/JHEP07(2012)191
Publication status	Published - 12 Jul 2012

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10.1007/JHEP07(2012)191

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@article{50875e24f9494e4ea38e5b91ffa755f6,

title = "Measurement of charm production at central rapidity in proton-proton collisions at sqrt(s) = 2.76 TeV",

abstract = "The pt-differential production cross sections of the prompt (B feed-down subtracted) charmed mesons D0, D+, and D*+ in the rapidity range |y| < 0.5, and for transverse momentum 1 < pt < 12 GeV/c, were measured in proton-proton collisions at √s = 2.76 TeV with the ALICE detector at the Large Hadron Collider. The analysis exploited the hadronic decays D0 → K-π+, D+ → K-π+π+, D*+ → D0π+, and their charge conjugates, and was performed on a Lint = 1.1 nb-1 event sample collected in 2011 with a minimum-bias trigger. The total charm production cross section at √s = 2.76 TeV and at 7 TeV was evaluated by extrapolating to the full phase space the pt-differential production cross sections at √s = 2.76 TeV and our previous measurements at √s = 7 TeV. The results were compared to existing measurements and to perturbative-QCD calculations. The fraction of cd D mesons produced in a vector state was also determined.",

author = "B. Abelev and Hans B{\o}ggild and Ian Bearden and Christensen, {Christian Holm} and Dalsgaard, {Hans Hjersing} and Gulbrandsen, {Kristjan Herlache} and Gaardh{\o}je, {Jens J{\o}rgen} and Nielsen, {B{\o}rge Svane} and Casper Nygaard and Carsten S{\o}gaard",

year = "2012",

month = jul,

day = "12",

doi = "10.1007/JHEP07(2012)191",

language = "English",

volume = "2012",

pages = "191",

journal = "Journal of High Energy Physics (Online)",

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TY - JOUR

T1 - Measurement of charm production at central rapidity in proton-proton collisions at sqrt(s) = 2.76 TeV

AU - Abelev, B.

AU - Bøggild, Hans

AU - Bearden, Ian

AU - Christensen, Christian Holm

AU - Dalsgaard, Hans Hjersing

AU - Gulbrandsen, Kristjan Herlache

AU - Gaardhøje, Jens Jørgen

AU - Nielsen, Børge Svane

AU - Nygaard, Casper

AU - Søgaard, Carsten

PY - 2012/7/12

Y1 - 2012/7/12

N2 - The pt-differential production cross sections of the prompt (B feed-down subtracted) charmed mesons D0, D+, and D*+ in the rapidity range |y| < 0.5, and for transverse momentum 1 < pt < 12 GeV/c, were measured in proton-proton collisions at √s = 2.76 TeV with the ALICE detector at the Large Hadron Collider. The analysis exploited the hadronic decays D0 → K-π+, D+ → K-π+π+, D*+ → D0π+, and their charge conjugates, and was performed on a Lint = 1.1 nb-1 event sample collected in 2011 with a minimum-bias trigger. The total charm production cross section at √s = 2.76 TeV and at 7 TeV was evaluated by extrapolating to the full phase space the pt-differential production cross sections at √s = 2.76 TeV and our previous measurements at √s = 7 TeV. The results were compared to existing measurements and to perturbative-QCD calculations. The fraction of cd D mesons produced in a vector state was also determined.

AB - The pt-differential production cross sections of the prompt (B feed-down subtracted) charmed mesons D0, D+, and D*+ in the rapidity range |y| < 0.5, and for transverse momentum 1 < pt < 12 GeV/c, were measured in proton-proton collisions at √s = 2.76 TeV with the ALICE detector at the Large Hadron Collider. The analysis exploited the hadronic decays D0 → K-π+, D+ → K-π+π+, D*+ → D0π+, and their charge conjugates, and was performed on a Lint = 1.1 nb-1 event sample collected in 2011 with a minimum-bias trigger. The total charm production cross section at √s = 2.76 TeV and at 7 TeV was evaluated by extrapolating to the full phase space the pt-differential production cross sections at √s = 2.76 TeV and our previous measurements at √s = 7 TeV. The results were compared to existing measurements and to perturbative-QCD calculations. The fraction of cd D mesons produced in a vector state was also determined.

U2 - 10.1007/JHEP07(2012)191

DO - 10.1007/JHEP07(2012)191

M3 - Journal article

SN - 1126-6708

VL - 2012

SP - 191

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

IS - 7

ER -

Measurement of charm production at central rapidity in proton-proton collisions at sqrt(s) = 2.76 TeV

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