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 D 0 → K -π +, D + → K -π +π +, D *+ → D 0π +, 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. © 2012 SISSA.

Measurement of charm production at central rapidity in proton-proton collisions at √s = 2.76 TeV

CAFFARRI, DAVIDE;LUNARDON, MARCELLO;MORANDO, MAURIZIO;MORETTO, SANDRA;SCARLASSARA, FERNANDO;SEGATO, GIANFRANCO;SORAMEL, FRANCESCA;VIESTI, GIUSEPPE;
2012

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 D 0 → K -π +, D + → K -π +π +, D *+ → D 0π +, 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. © 2012 SISSA.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2531130
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 152
  • ???jsp.display-item.citation.isi??? 141
social impact