CHARM-ANTICHARM ASYMMETRIES IN HIGH-ENERGY PHOTOPRODUCTION

Authors
FRABETTI PL CHEUNG HWK CUMALAT JP DALLAPICCOLA C GINKEL JF JOHNS WE NEHRING MS BUTLER JN CIHANGIR S GAINES I GARBINCIUS PH GARREN L GOURLAY SA HARDING DJ KASPER P KREYMER A LEBRUN P SHUKLA S VITTONE M BIANCO S FABBRI FL SARWAR S ZALLO A CULBERTSON R GARDNER RW GREENE R WISS J ALIMONTI G BELLINI G BOSCHINI M BRAMBILLA D CACCIANIGA B CINQUINI L DICORATO M GIAMMARCHI M INZANI P LEVERARO F MALVEZZI S MENASCE D MERONI E MORONI L PEDRINI D PERASSO L PRELZ F SALA A SALA S TORRETTA D BUCHHOLZ D CLAES D GOBBI B OREILLY B BISHOP JM CASON NM KENNEDY CJ KIM GN LIN TF PUSELJIC DL RUCHTI RC SHEPHARD WD SWIATEK JA WU ZY ARENA V BOCA G CASTOLDI C GIANINI G RATTI SP RICCARDI C VIOLA L VITULO P LOPEZ A GRIM GP PAOLONE VS YAGER PM WILSON JR SHELDON PD DAVENPORT F BLACKETT GR DANYO K PISHARODY M HANDLER T CHEON BG KANG JS KIM KY
Citation
Pl. Frabetti et al., CHARM-ANTICHARM ASYMMETRIES IN HIGH-ENERGY PHOTOPRODUCTION, Physics letters. Section B, 370(1-2), 1996, pp. 222-232
Citations number
16
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
370
Issue
1-2
Year of publication
1996
Pages
222 - 232
Database
ISI
SICI code
0370-2693(1996)370:1-2<222:CAIHP>2.0.ZU;2-C
Abstract
We report measurements of charm particle production asymmetries from t he Fermilab photoproduction experiment E687. An asymmetry in the rate of production of charm versus anticharm particles is expected to arise primarily from fragmentation effects. We observe statistically signif icant asymmetries in the photoproduction of D+, D-+ and D-0 mesons an d find small (but statistically weak) asymmetries in the production of the D-s(+) meson and the Lambda(c)(+) baryon. Our inclusive photoprod uction asymmetries are compared to predictions from nonperturbative mo dels of charm quark fragmentation.