With a sample of 232 x 10(6) Y(4S) --> B (B) over bar events collected with the BABAR detector, we study the decay B+ --> p (p) over barK(+) excluding charmonium decays to p (p) over bar. We measure a branching fraction B(B+ --> p (p) over barK(+)) = 6.7 +/- 0.5 +/- 0.4) x 10(-6). An enhancement at low p (p) over bar mass is observed and the Dalitz plot asymmetry suggests dominance of the penguin amplitude in this B decay. We search for a pentaquark candidate Theta(*++) decaying into pK(+) in the mass range 1.43 to 2.00 GeV/c(2) and set limits on B(B+ --> Theta(*++) (p) over bar) x B(Theta(*++) --> pK(+)) at the 10(-7) level.

Measurement of the B+-> p(p)over-barK(+) branching fraction and study of the decay dynamics / Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J.p., Poireau, V., Tisserand, V., Zghiche, A., Grauges, E., Palano, A., Pappagallo, M., Pompili, A., Chen, J.c., Qi, N.d., Rong, G., Wang, P., Zhu, Y.s., Eigen, G., Ofte, I., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 72:(2005). [10.1103/physrevd.72.051101]

Measurement of the B+-> p(p)over-barK(+) branching fraction and study of the decay dynamics

DEL RE, Daniele;RAHATLOU, SHAHRAM;BELLINI, Fabio;CAVOTO, Gianluca;FACCINI, Riccardo;FERRONI, Fernando;GASPERO, Mario;VOENA C;
2005

Abstract

With a sample of 232 x 10(6) Y(4S) --> B (B) over bar events collected with the BABAR detector, we study the decay B+ --> p (p) over barK(+) excluding charmonium decays to p (p) over bar. We measure a branching fraction B(B+ --> p (p) over barK(+)) = 6.7 +/- 0.5 +/- 0.4) x 10(-6). An enhancement at low p (p) over bar mass is observed and the Dalitz plot asymmetry suggests dominance of the penguin amplitude in this B decay. We search for a pentaquark candidate Theta(*++) decaying into pK(+) in the mass range 1.43 to 2.00 GeV/c(2) and set limits on B(B+ --> Theta(*++) (p) over bar) x B(Theta(*++) --> pK(+)) at the 10(-7) level.
2005
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the B+-> p(p)over-barK(+) branching fraction and study of the decay dynamics / Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J.p., Poireau, V., Tisserand, V., Zghiche, A., Grauges, E., Palano, A., Pappagallo, M., Pompili, A., Chen, J.c., Qi, N.d., Rong, G., Wang, P., Zhu, Y.s., Eigen, G., Ofte, I., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 72:(2005). [10.1103/physrevd.72.051101]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/231769
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