Mass splitting and production of Sigma(0)(c) and Sigma(++)(c) measured in 500GeV pi(-)-N interactions

被引：17

作者：

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

机构：

[1] CTR BRASILEIRO PESQUISAS FIS,RIO JANEIRO,BRAZIL

[2] UNIV CINCINNATI,CINCINNATI,OH 45221

[3] CINVESTAV IPN,MEXICO CITY,DF,MEXICO

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

[5] IIT,CHICAGO,IL 60616

[6] KANSAS STATE UNIV,MANHATTAN,KS 66506

[7] OHIO STATE UNIV,COLUMBUS,OH 43210

[8] PRINCETON UNIV,PRINCETON,NJ 08544

[9] UNIV AUTONOMA PUEBLA,PUEBLA 72570,MEXICO

[10] UNIV S CAROLINA,COLUMBIA,SC 29208

[11] STANFORD UNIV,STANFORD,CA 94305

[12] TEL AVIV UNIV,IL-69978 TEL AVIV,ISRAEL

[13] TUFTS UNIV,MEDFORD,MA 02155

[14] UNIV WISCONSIN,MADISON,WI 53706

[15] YALE UNIV,NEW HAVEN,CT 06511

来源：

PHYSICS LETTERS B | 1996年 / 379卷 / 1-4期

关键词：

D O I：

10.1016/0370-2693(96)00471-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

From a sample of 2722+/-78 Lambda(c)(+) decaying to the pK(-)pi(+) final 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(Sigma(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 rate 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 Lambda(c)(+) from Sigma(c) decays are observed to be similar to those for all Lambda(c)(+)'s produced.

引用

页码：292 / 298

页数：7

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