MASS SPLITTING AND PRODUCTION OF SIGMA(0)(C) AND SIGMA(-)-N INTERACTIONS(+)(C) MEASURED IN 500GEV PI()

Authors
AITALA EM AMATO S ANJOS JC APPEL JA ASHERY D BANERJEE S BEDIAGA L BLAYLOCK G BRACKER SB BURCHAT PR BURNSTEIN RA CARTER T CARVALHO HS COPTY NK COSTA I CREMALDI LM DARLING C DENISENKO K ENGELFRIED J FERNANDEZ A GAGNON P GERZON S GOUNDER K HALLING AM HERRERA G HURVITS G JAMES C KASPER PA KONDAKIS N KWAN S LANGS DC LESLIE J LICHTENSTADT J LUNDBERG B MANACERO A MAYTALBECK S MEADOWS B NETO JRTD MILBURN RH DEMIRANDA JM NAPIER A NGUYEN A DOLIVEIRA AB OSHAUGHNESSY K PENG KC PERERA LP PUROHIT MV QUINN B RADEZTSKY S RAFATIAN A REAY NW REIDY JJ DOSREIS AC RUBIN HA SANTHA AKS SANTORO AFS SCHWARTZ AJ SHEAFF M SIDWELL RA SLAUGHTER AJ SMITH JG SOKOLOFF MD STANTON NR SUGANO K SUMMERS DJ TAKACH S THORNE K TRIPATHI AK WATANABE S WEISSBABAI R WIENER J WITCHEY N WOLIN E YI D ZALIZNYAK R ZHANG C
Citation
Em. Aitala et al., MASS SPLITTING AND PRODUCTION OF SIGMA(0)(C) AND SIGMA(-)-N INTERACTIONS(+)(C) MEASURED IN 500GEV PI(), Physics letters. Section B, 379(1-4), 1996, pp. 292-298
Citations number
29
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
379
Issue
1-4
Year of publication
1996
Pages
292 - 298
Database
ISI
SICI code
0370-2693(1996)379:1-4<292:MSAPOS>2.0.ZU;2-2
Abstract
From a sample of 2722+/-78 Lambda(c)(+) decaying to the pK(-)pi(+) fin al state, we have observed, in the hadroproduction experiment E791 at Fermilab, 143+/-20 Sigma(c)(0) and 122+/-18 Sigma(c)(++) through their decays to Lambda(c)(+)pi(+/-). The mass difference M(Sigma(c)(0)) - M (Lambda(c)(+)) is measured to be (167.38+/-0.29+/-1.15) MeV; for M(Sig ma(c)(++)) - M(Lambda(c)(+)), we find (167.76+/-0.29+/-0.15) MeV. The rare of Lambda(c)(+) production from decays of the Sigma(c) tripler is (22+/-2+/-3)% of the total Lambda(c)(+) production assuming equal rat e of production from all three, as measured for Sigma(c)(0) and Sigma( c)(++). We do not observe a statistically significant Sigma(c), baryon -antibaryon production asymmetry. The x(F) and p(t)(2) spectra of Lamb da(c)(+) from Sigma(c) decays are observed to be similar to those for all Lambda(c)(+)'s produced.