OBSERVATION OF AN EXCITED-STATE OF THE LAMBDA(+)(C) BARYON

被引：56

作者：

FRABETTI, PL

CHEUNG, HWK

CUMALAT, JP

DALLAPICCOLA, C

GINKEL, JF

GREENE, SV

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

BIANCO, S

FABBRI, FL

SARWAR, S

ZALLO, A

CULBERTSON, R

GARDNER, RW

GREENE, R

WISS, J

ALIMONTI, G

BELLINI, G

CACCIANIGA, B

CINQUINI, L

DICORATO, M

GIAMMARCHI, M

INZANI, P

LEVERARO, F

MALVEZZI, S

MENASCE, D

MERONI, E

MORONI, L

PEDRINI, D

PERASSO, L

SALA, A

SALA, S

TORRETTA, D

VITTONE, M

BUCHHOLZ, D

CLAES, D

GOBBI, B

OREILLY, B

BISHOP, JM

机构：

[1] IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY

[2] UNIV COLORADO,BOULDER,CO 80309

[3] FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510

[4] IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY

[5] UNIV ILLINOIS,URBANA,IL 61801

[6] UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY

[7] NORTHWESTERN UNIV,EVANSTON,IL 60208

[8] UNIV NOTRE DAME,NOTRE DAME,IN 46556

[9] UNIV PAVIA,DIPARTIMENTO FIS NUCL & TEOR,I-27100 PAVIA,ITALY

[10] IST NAZL FIS NUCL,I-27100 PAVIA,ITALY

[11] UNIV PUERTO RICO,MAYAGUEZ,PR

[12] UNIV CALIF DAVIS,DAVIS,CA 95616

[13] UNIV S CAROLINA,COLUMBIA,SC 29208

[14] VANDERBILT UNIV,NASHVILLE,TN 37235

[15] UNIV N CAROLINA,ASHEVILLE,NC 28804

[16] NO KENTUCKY UNIV,HIGHLAND HTS,KY 41076

[17] UNIV TENNESSEE,KNOXVILLE,TN 37996

[18] KOREA UNIV,SEOUL 136701,SOUTH KOREA

[19] IST NAZL FIS NUCL,I-20133 MILAN,ITALY

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.72.961

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An observation of an excited Lambda(c)(+*) baryon decaying to Lambda(c)(+)pi(+)pi(-), with Lambda(c)(+) --> pK(-)pi(+), is presented. We reconstruct 39.7+/-8.7 Lambda(c)(+*) baryons with a mass of 340.4+/-0.6+/-0.3 MeV/c(2) above the Lambda(c)(+) mass. The upper limit on the resonant branching ratio is B(Lambda(c)(+*) --> Sigma(c) pi(+/-))/B(Lambda(c)(+*) --> Lambda(c)(+)pi(+)pi(-)) < 36% at the 90% confidence level.

引用

页码：961 / 964

页数：4

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