UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Observation of the heavy baryons Sigma(b) and Sigma(b)*

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. Green open access

[img]
Preview
Text
151894.pdf

Download (257kB)

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 > 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
Downloads since deposit
59Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item