Observation of the heavy baryons <script type="math/tex">\Sigma_{b}</script> and <script type="math/tex">\Sigma_{b}^{*}</script>

Aaltonen, T.; Van Remortel, N.; et al.

doi:10.1103/PHYSREVLETT.99.202001

Publication

Title

Observation of the heavy baryons $\Sigma_{b}$ and $\Sigma_{b}^{*}$

Author

Aaltonen, T.

Van Remortel, N.

et al.

Institution/Organisation

CDF Collaboration

Abstract

We report an observation of new bottom baryons produced in pp̅ collisions at the Tevatron. Using 1.1 fb-1 of data collected by the CDF II detector, we observe four Λb0π± resonances in the fully reconstructed decay mode Λb0→Λc+π-, where Λc+→pK-π+. We interpret these states as the Σb(*)± baryons and measure the following masses: mΣb+=5807.8-2.2+2.0(stat.)±1.7(syst.) MeV/c2, mΣb-=5815.2±1.0(stat.)±1.7(syst.) MeV/c2, and m(Σb*)-m(Σb)=21.2-1.9+2.0(stat.)-0.3+0.4(syst.) MeV/c2.

Language

English

Source (journal)

Physical review letters. - New York, N.Y., 1958, currens

Publication

New York, N.Y. : American Physical Society , 2007

ISSN

0031-9007 [print]

1079-7114 [online]

Volume/pages

99 :20 (2007) , p. 202001,1-202001,7

ISI