Aaltonen, T;
Abulencia, A;
Adelman, J;
Affolder, T;
Akimoto, T;
Albrow, MG;
Amerio, S;
... CDF Collaboration; + view all
(2007)
Observation of the heavy baryons Sigma(b) and Sigma(b)*.
Physical Review Letters
, 99
(20)
, Article 202001. 10.1103/PhysRevLett.99.202001.
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Abstract
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).
| Type: | Article |
|---|---|
| Title: | Observation of the heavy baryons Sigma(b) and Sigma(b)* |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.99.202001 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.99.202001 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | POTENTIAL MODELS, MASSES, QUARK, SPECTROSCOPY, PHYSICS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/151894 |
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