Observation of the heavy baryons Σb and Σb*

被引：123

作者：

Aaltonen, T. ^{[1
]}

Abulencia, A.

Adelman, J.

Affolder, T.

Akimoto, T.

Albrow, M. G.

Amerio, S.

Amidei, D.

Anastassov, A.

Anikeev, K.

Annovi, A.

Antos, J.

Aoki, M.

Apollinari, G.

Arisawa, T.

Artikov, A.

Ashmanskas, W.

Attal, A.

Aurisano, A.

Azfar, F.

Azzi-Bacchetta, P.

Azzurri, P.

Bacchetta, N.

Badgett, W.

Barbaro-Galtieri, A.

Barnes, V. E.

Barnett, B. A.

Baroiant, S.

Bartsch, V.

Bauer, G.

Beauchemin, P. -H.

Bedeschi, F.

Behari, S.

Bellettini, G.

Bellinger, J.

Belloni, A.

Benjamin, D.

Beretvas, A.

Beringer, J.

Berry, T.

Bhatti, A.

Binkley, M.

Bisello, D.

Bizjak, I.

Blair, R. E.

Blocker, C.

Blumenfeld, B.

Bocci, A.

Bodek, A.

Boisvert, V.

机构：

[1] Okayama Univ, Okayama 7008530, Japan

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 20期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevLett.99.202001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report an observation of new bottom baryons produced in p (p) over bar collisions at the Tevatron. Using 1.1 fb(-1) of data collected by the CDF II detector, we observe four Lambda(0)(b)pi(+/-) resonances in the fully reconstructed decay mode Lambda(0)(b)->Lambda(+)(c)pi(-), where Lambda(+)(c)-> pK(-)pi(+). We interpret these states as the Sigma((*)+/-)(b) baryons and measure the following masses: m(Sigma b)(+)=5807.8(-2.2)(+2.0)(stat.)+/- 1.7(syst.) MeV/c(2), m(Sigma b)(-)=5815.2 +/- 1.0(stat.)+/- 1.7(syst.) MeV/c(2), and m(Sigma(*)(b))-m(Sigma(b))=21.2(-1.9)(+2.0)(stat.)(-0.3)(+0.4)(syst.) MeV/c(2).

引用

页数：7

共 31 条

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