Observation of a new χ_b state at ATLAS and a new Ξ_b baryon at CMS

Abstract

Two recent observations of new b hadrons in pp collisions at \sqrt{s} = 7 TeV at the Large Hadron Collider (LHC) are presented. The ATLAS collaboration has observed a new state in radiative transitions to Υ(1S) and Υ(2S) and interprets this as the first observation of the χ_b(3P) states. The CMS collaboration has observed a new b baryon decaying to Ξ_b-π+ (plus charge conjugates). This is interpreted as a neutral J^P = 3/2^+ Ξ_b* baryon.

arXiv comment10 pages, 6 figures, Presented at Flavor Physics and CP Violation (FPCP 2012), Hefei, China, May 21-25, 2012