SEARCH FOR LAMBDA(B)-]-J/PSI-LAMBDA(0) IN P(P)OVER-BAR COLLISIONS AT ROOT-S = 1.8 TEV

被引：21

作者：

ABE, F

AMIDEI, D

ANWAYWIESE, C

APOLLINARI, G

ATAC, M

AUCHINCLOSS, P

AZZI, P

BADEN, AR

BACCHETTA, N

BADGETT, W

BAILEY, MW

BAMBERGER, A

DEBARBARO, P

BARBAROGALTIERI, A

BARNES, VE

BARNETT, BA

BAUER, G

BAUMANN, T

BEDESCHI, F

BEHRENDS, S

BELFORTE, S

BELLETTINI, G

BELLINGER, J

BENJAMIN, D

BENLLOCH, J

BENSINGER, J

BERETVAS, A

BERGE, JP

BERTOLUCCI, S

BIERY, K

BHADRA, S

BINKLEY, M

BISELLO, D

BLAIR, R

BLOCKER, C

BODEK, A

BOLOGNESI, V

BOOTH, AW

BOSWELL, C

BRANDENBURG, G

BROWN, D

BUCKLEYGEER, E

BUDD, HS

BUSETTO, G

BVONWAGNER, A

BYRUM, KL

CAMPAGNARI, C

CAMPBELL, M

CANER, A

CAREY, R

机构：

[1] BRANDEIS UNIV, WALTHAM, MA 02254 USA

[2] UNIV CALIF LOS ANGELES, LOS ANGELES, CA 90024 USA

[3] UNIV CHICAGO, CHICAGO, IL 60637 USA

[4] DUKE UNIV, DURHAM, NC 27706 USA

[5] FERMILAB NATL ACCELERATOR LAB, BATAVIA, IL 60510 USA

[6] IST NAZL FIS NUCL, LAB NAZL FRASCATI, FRASCATI, ITALY

[7] HARVARD UNIV, CAMBRIDGE, MA 02138 USA

[8] UNIV ILLINOIS, URBANA, IL 61801 USA

[9] JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA

[10] LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA

[11] MIT, CAMBRIDGE, MA 02139 USA

[12] UNIV MICHIGAN, ANN ARBOR, MI 48109 USA

[13] UNIV PADUA, INST NAZL FIS NUCL, SEZIONE PADOVA, I-35131 PADUA, ITALY

[14] UNIV PENN, PHILADELPHIA, PA 19104 USA

[15] UNIV PISA, INST NAZL FIS NUCL, I-56100 PISA, ITALY

[16] SCUOLA NORMALE SUPER PISA, I-56100 PISA, ITALY

[17] PURDUE UNIV, W LAFAYETTE, IN 47907 USA

[18] UNIV ROCHESTER, ROCHESTER, NY 15627 USA

[19] ROCKEFELLER UNIV, NEW YORK, NY 10021 USA

[20] RUTGERS STATE UNIV, PISCATAWAY, NJ 08854 USA

[21] TEXAS A&M UNIV SYST, COLL STN, TX 77843 USA

[22] UNIV TSUKUBA, TSUKUBA, IBARAKI 305, JAPAN

[23] TUFTS UNIV, MEDFORD, MA 02155 USA

[24] UNIV WISCONSIN, MADISON, WI 53706 USA

[25] KEK, NATL LAB HIGH ENERGY PHYS, TOKYO, JAPAN

来源：

PHYSICAL REVIEW D | 1993年 / 47卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.47.R2639

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have searched for the b-flavored baryon decay LAMBDA(b) --> J/psi LAMBDA0 in ppBAR collisions at square-root s = 1.8 TeV with the Collider Detector at Fermilab (CDF). In the J/psi LAMBDA0 invariant-mass distribution we observe a flat distribution and a small number of events, consistent with no signal. Using the b-quark cross section measured by the CDF we put an upper limit on the b --> LAMBDA(b) production fraction times the branching ratio F(LAMBDA(b))B(LAMBDA(b) --> J/psi LAMBDA0) of 0.50 X 10(-3) at 90% confidence level.

引用

页码：R2639 / R2643

页数：5

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