A study of angular asymmetries in the rare decay B (right arrow) K*[lambda]⁺[lambda]⁻

Simple item page
dc.contributor.advisorRitchie, Jack L., 1955-en
dc.creatorSchilling, Chris James, 1980-en
dc.date.accessioned2012-09-04T15:24:01Zen
dc.date.accessioned2017-05-11T22:27:17Z
dc.date.available2012-09-04T15:24:01Zen
dc.date.available2017-05-11T22:27:17Z
dc.date.issued2008-08en
dc.descriptiontexten
dc.description.abstractThis dissertation describes studies of the rare quark transition process b → s`+` −, in particular the B meson decay B → K∗ ` +` − where the ` +` − is either e +e − or µ +µ −. These decays are highly suppressed in the Standard Model and could be strongly affected by new physics. The angular observables describing the lepton forward-backward asymmetry and the longitudinal K∗ polarization are measured in this mode. The measurements were performed using the BABAR detector at the SLAC PEPII storage ring running at the Υ(4S) resonance. The analysis was performed on a 349 fb−1 sample corresponding to 384 million BB pairs. The data was collected over a period of six years beginning in 1999. For low dilepton invariant masses, m`` < 2.5 GeV/c2 , we measure a lepton forward backward asymmetry AFB = 0.24+0.18 −0.23 ± 0.05 and a K∗ longitudinal polarization FL = 0.35 ± 0.16 ± 0.04. For m`` > 3.2 GeV/c2 , we measure AFB = 0.76+0.52 −0.32 ± 0.07 and FL = 0.71+0.20 −0.22 ± 0.04.
dc.description.departmentPhysicsen
dc.format.mediumelectronicen
dc.identifier.urihttp://hdl.handle.net/2152/17752en
dc.language.isoengen
dc.rightsCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en
dc.subject.lcshMesons--Decayen
dc.subject.lcshParticles (Nuclear physics)en
dc.titleA study of angular asymmetries in the rare decay B (right arrow) K*[lambda]⁺[lambda]⁻en

Files

Collections

University of Texas at Austin