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Titolo:
STUDY OF THE ISOSPIN SYMMETRY-BREAKING IN THE LIGHT-QUARK SEA OF THE NUCLEON FROM THE DRELL-YAN PROCESS
Autore:
BALDIT A; BARRIERE C; CASTOR J; CHAMBON T; DEVAUX A; ESPAGNON B; FARGEIX J; FORCE P; LANDAUD G; SATURNINI P; VAZEILLE F; SONDEREGGER P; ABREU MC; BORDALO P; FERREIRA R; LOURENCO C; RAMOS S; SILVA S; VARELA J; GERSCHEL C; JOUAN D; TARRAGO X; CHAURAND B; KLUBERG L; ROMANA A; GORODETZKY P; LAZIC D; MAZINI R; RACCA C; ALESSANDRO B; CHIAVASSA E; DELLACASA G; GALLIO M; GIUBELLINO P; GUAITA P; MARZARICHIESA A; MASERA M; MONTENO M; MUSSO A; RAMELLO L; RICCATI L; SCOMPARIN E; VERCELLIN E; BEDJIDIAN M; CONTARDO D; DESCROIX E; DRAPIER O; GROSSIORD JY; GUICHARD A; HAROUTUNIAN R; MALEK F; MANDRY R; PIZZI JR;
Indirizzi:
LAB PHYS CORPUSCULAIRE CLERMONT FERRAND,CNRS,IN2P3 F-63177 CLERMONT FERRAND FRANCE CERN CH-1211 GENEVA 23 SWITZERLAND INST PHYS NUCL LYON,CNRS,IN2P3 F-91406 ORSAY FRANCE ECOLE POLYTECH,PHYS NUCL HAUTES ENERGIES LAB,CNRS,IN2P3 F-91128 PALAISEAU FRANCE INST PHYS NUCL LYON,CNRS,IN2P3 F-69622 VILLEURBANNE FRANCE CTR RECH NUCL,CNRS,IN2P3 F-67037 STRASBOURG FRANCE UNIV LOUIS PASTEUR F-67037 STRASBOURG FRANCE UNIV PARIS 11 F-91405 ORSAY FRANCE UNIV CLERMONT FERRAND F-63177 CLERMONT FERRAND FRANCE INFN I-10125 TURIN ITALY UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE I-10125 TURIN ITALY UNIV TECN LISBON,IST LISBON PORTUGAL INST POLITECN LISBOA,ISEL LISBON PORTUGAL UNIV LYON 1 F-69622 VILLEURBANNE FRANCE UNIV LISBON,FCUL LISBON PORTUGAL
Titolo Testata:
Physics letters. Section B
fascicolo: 1-2, volume: 332, anno: 1994,
pagine: 244 - 250
SICI:
0370-2693(1994)332:1-2<244:SOTISI>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARTON DISTRIBUTIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
A. Baldit et al., "STUDY OF THE ISOSPIN SYMMETRY-BREAKING IN THE LIGHT-QUARK SEA OF THE NUCLEON FROM THE DRELL-YAN PROCESS", Physics letters. Section B, 332(1-2), 1994, pp. 244-250

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 gamma almost-equal-to 0, with 450 GeV/c incident protons. The asymmetry A(DY) = sigma(pp)-sigma(pn)/sigma(pp)+sigma(pn) amounts to -0.09 +/- 0.02 /- 0.025. The ratio uBAR/dBAR 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.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 13:39:23