The production of D* and D mesons in inelastic scattering of 160 GeV/c muons off a (LiD)-Li-6 target has been investigated with the COMPASS spectrometer at CERN for 0.003 (GeV/c)(2) < Q(2) < 10 (GeV/c)(2) and 3 x 10(-5) < x(Bj) < 0.1. The study is based on 8100 events where a D-0 or (D) over bar (0) is detected subsequently to a D*(+) or D*(-) decay, and on 34000 events, where only a D-0 or (D) over bar (0) is detected. Kinematic distributions of D*, D and K-2* (1430) are given as a function of their energy E, transverse momentum p(T), energy fraction z, and of the virtual photon variables nu, Q(2) and x(Bj). Semi-inclusive differential D* production cross-sections are compared with theoretical predictions for D* production via photon-gluon fusion into open charm. The total observed production cross-section for D*(+/-) mesons with laboratory energies between 22 and 86 GeV is (1.9 +/- 0.4) nb. Significant cross-section asymmetries are observed between D*(+) and D*(-) production for nu < 40 GeV and z > 0.6.

D ∗ and D meson production in muon nucleon interactions at 160 GeV/c

ALEXEEV, Maxim;AMOROSO, Antonio;BALESTRA, Ferruccio;BERTINI, Raimondo Pietro;CHIOSSO, Michela;GARFAGNINI, Raffaello;GNESI, IVAN;GRASSO, Antonino;PANZIERI, Daniele;PARSAMYAN, BAKUR;PIRAGINO, Guido;SOSIO, Stefano;TAKEKAWA, STEFANO;
2012-01-01

Abstract

The production of D* and D mesons in inelastic scattering of 160 GeV/c muons off a (LiD)-Li-6 target has been investigated with the COMPASS spectrometer at CERN for 0.003 (GeV/c)(2) < Q(2) < 10 (GeV/c)(2) and 3 x 10(-5) < x(Bj) < 0.1. The study is based on 8100 events where a D-0 or (D) over bar (0) is detected subsequently to a D*(+) or D*(-) decay, and on 34000 events, where only a D-0 or (D) over bar (0) is detected. Kinematic distributions of D*, D and K-2* (1430) are given as a function of their energy E, transverse momentum p(T), energy fraction z, and of the virtual photon variables nu, Q(2) and x(Bj). Semi-inclusive differential D* production cross-sections are compared with theoretical predictions for D* production via photon-gluon fusion into open charm. The total observed production cross-section for D*(+/-) mesons with laboratory energies between 22 and 86 GeV is (1.9 +/- 0.4) nb. Significant cross-section asymmetries are observed between D*(+) and D*(-) production for nu < 40 GeV and z > 0.6.
2012
72
12
2253-1
2253-17
PRODUCTION CROSS-SECTION; MONTE-CARLO GENERATOR; CHARM PHOTOPRODUCTION; QCD CORRECTIONS; HEAVY QUARKS; ASYMMETRIES; SCATTERING; COLLISIONS
C. Adolph;M. G. Alekseev;V. Yu. Alexakhin;Yu. Alexandrov;G. D. Alexeev;A. Amoroso;A. A. Antonov;A. Austregesilo;B. Badełek;F. Balestra;J. B...espandi
File in questo prodotto:
File Dimensione Formato  
EPJC_72_2012_a2253_P1-17.pdf

Accesso riservato

Tipo di file: POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione 1.43 MB
Formato Adobe PDF
1.43 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

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/2318/136224
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 7
  • ???jsp.display-item.citation.isi??? 3
social impact