We report on a search for Lambda(b)(0)-> p pi(-) and Lambda(b)(0)-> pK(-) (and charge conjugate) decays in p (p) over bar collisions at root s=1.96 TeV using 193 pb(-1) of data collected by the CDF II experiment at the Fermilab Tevatron Collider. Data were collected using a track trigger that has been optimized to select tracks belonging to a secondary vertex that is typical of two-body charmless decays of b-flavored hadrons, including Lambda(b)(0) baryons. As no Lambda(b)(0) signal was observed, we set the upper limits on the branching fraction B(Lambda(b)(0)-> ph(-)), where h is K or pi, of 2.3x10(-5) at 90% C.L. and 2.9x10(-5) at 95% C.L. RI Lancaster, Mark/C-1693-2008; Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; Wolter, Marcin/A-7412-2012; St.Denis, Richard/C-8997-2012; Prokoshin, Fedor/E-2795-2012; Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012

Search for Lambda(0)(b)-> p pi and Lambda(0)(b)-> pK decays in p(p)over-bar collisions at root s=1.96 TeV

PIACENTINO, Giovanni Maria;
2005

Abstract

We report on a search for Lambda(b)(0)-> p pi(-) and Lambda(b)(0)-> pK(-) (and charge conjugate) decays in p (p) over bar collisions at root s=1.96 TeV using 193 pb(-1) of data collected by the CDF II experiment at the Fermilab Tevatron Collider. Data were collected using a track trigger that has been optimized to select tracks belonging to a secondary vertex that is typical of two-body charmless decays of b-flavored hadrons, including Lambda(b)(0) baryons. As no Lambda(b)(0) signal was observed, we set the upper limits on the branching fraction B(Lambda(b)(0)-> ph(-)), where h is K or pi, of 2.3x10(-5) at 90% C.L. and 2.9x10(-5) at 95% C.L. RI Lancaster, Mark/C-1693-2008; Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; Wolter, Marcin/A-7412-2012; St.Denis, Richard/C-8997-2012; Prokoshin, Fedor/E-2795-2012; Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11695/4831
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