Study of the isospin symmetry breaking the in the light quark sea of the nucleon from the Drell-Yan process
Articolo
Data di Pubblicazione:
1994
Abstract:
The ratio of cross-sections for muon pair production through the Drell-Yan process in p - p and p - d reactions has been measured at y ~ 0, with 450 GeVc incident protons. The asymmetry ADY = δpp - δpn/δpp+δpn amounts to -0.09 +/- 0.02 +/- 0.025. The ratio u/d of the nucleon sea structure functions derived from this measurement amounts to 0.51 +/- 0.04 +/- 0.05 at x = 0.18 and suggests that isospin symmetry is broken in the light quark sea of the nucleon.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
A. Baldit ; C. Barriere; J. Castor; T. Chambon; A. Devaux; B. Espagnon; J. Fargeix; P. Force; G. Landaud; P. Saturnini; F. Vazeille; P. Sonderegger; M.C. Abreu; P. Bordalo; R. Ferreira; C. Lourenco; S. Ramos; S. Silva; J. Varela; C. Gerschel; D. Jouan; X. Tarrago; B. Chaurand; L. Kluberg; A. Romana; P. Gorodetzky; D. Lazic; R. Mazini; C. Racca; B. Alessandro; E. Chiavassa; G. Dellacasa; M. Gallio; P. Giubellino; P. Guaita; A. Marzari-Chiesa; M. Masera; M. Monteno; A. Musso; L. Ramello; L. Riccati; E. Scomparin; E. Vercellin; M. Bedjidian; D. Contardo; E. Descroix; O. Drapier; J.Y. Grossiord; A. Guichard; R. Haroutunian; Fairouz Malek; R. Mandry; J.R. Pizzi
Link alla scheda completa:
Pubblicato in: