Study of higher mass charm baryons decaying to Lambda(+)(c)

被引：31

作者：

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

机构：

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

[2] UNIV COLORADO, BOULDER, CO 80309 USA

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

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

[5] UNIV ILLINOIS, URBANA, IL 61801 USA

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

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

[8] NORTHWESTERN UNIV, EVANSTON, IL 60208 USA

[9] UNIV NOTRE DAME, NOTRE DAME, IN 46556 USA

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

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

[12] UNIV PUERTO RICO, MAYAGUEZ, PR 00708 USA

[13] UNIV CALIF DAVIS, DAVIS, CA 95616 USA

[14] UNIV S CAROLINA, COLUMBIA, SC 29208 USA

[15] VANDERBILT UNIV, NASHVILLE, TN 37235 USA

[16] UNIV N CAROLINA, ASHEVILLE, NC 28804 USA

[17] UNIV TENNESSEE, KNOXVILLE, TN 37996 USA

[18] KOREA UNIV, SEOUL 136701, SOUTH KOREA

来源：

PHYSICS LETTERS B | 1996年 / 365卷 / 1-4期

关键词：

D O I：

10.1016/0370-2693(95)01458-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on the study of charm baryons decaying to Lambda(c)(+):Lambda(c)*(+) (2625) --> Lambda(c)(+)pi(+)pi(-), Lambda(c)*(+) (2593) --> Lambda(c)(+)pi(+)pi(-), Sigma(c)(0) --> Lambda(c)(+)pi(-) and Sigma(c)(++) --> Lambda(c)(+)pi(+). We present a confirmation of the state Lambda(c)*(+) (2593) and determine its mass difference to be M(Lambda(c)*(+) (2593)) - M(Lambda(c)(+)) = 309.2 +/- 0.7 +/- 0.3 MeV/c(2). We determine the lower limit on the resonant branching ratio to be BR(Lambda(c)*(+) (2593) --> Sigma(c) pi(+/-)/Lambda(c)*(+) (2593) --> Lambda(c)(+)pi(+)pi(-)) > 0.51 (90% c.l.). We also measure the mass differences M(Sigma(c)(0)) - M(Lambda(c)(+)) = 166.6 +/- 0.5 +/- 0.6 MeV/c(2) and M(Sigma(c)(++)) - M(Lambda(c)(+)) = 167.6 +/- 0.6 +/- 0.6 MeV/c(2). Finally, we measure the relative photoproduction cross sections for Lambda(c)*(+) and Sigma(c) with respect to the (inclusive) photoproduction cross section for Lambda(c)(+).

引用

页码：461 / 469

页数：9

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