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We search for new charmless decays of neutral b hadrons to pairs of charged hadrons, using 1fb-1 of data collected by the CDF II detector at the Fermilab Tevatron. We report the first observation of the Bs0→K-π+ decay and measure B(Bs0→K-π+)=(5.0±0.7(stat)±0.8(syst))×10-6. We also report the first observation of charmless b-baryon decays, and measure B(Λb0→pπ-)=(3.5±0.6(stat)±0.9(syst))×10-6 and B(Λb0→pK-)=(5.6±0.8(stat)±1.5(syst))×10-6. No evidence is found for other modes, and we set the limit B(Bs0→π+π-) <1.2×10-6 at 90%C.L. © 2009 The American Physical Society.

Observation of new charmless decays of bottom hadrons / Aaltonen, T., Adelman, J., Akimoto, T., Gonzalez, B.a., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Apresyan, A., Arisawa, T., Artikov, A., Ashmanskas, W., Attal, A., Aurisano, A., Azfar, F., Azzurri, P., Badgett, W., BARBARO GALTIERI, A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 103:3(2009). [10.1103/physrevlett.103.031801]

Observation of new charmless decays of bottom hadrons

DE CECCO, Sandro;DIONISI, Carlo;GIAGU, Stefano;MARGAROLI, Fabrizio;IORI, Maurizio;LUCI, Claudio;
2009

Abstract

We search for new charmless decays of neutral b hadrons to pairs of charged hadrons, using 1fb-1 of data collected by the CDF II detector at the Fermilab Tevatron. We report the first observation of the Bs0→K-π+ decay and measure B(Bs0→K-π+)=(5.0±0.7(stat)±0.8(syst))×10-6. We also report the first observation of charmless b-baryon decays, and measure B(Λb0→pπ-)=(3.5±0.6(stat)±0.9(syst))×10-6 and B(Λb0→pK-)=(5.6±0.8(stat)±1.5(syst))×10-6. No evidence is found for other modes, and we set the limit B(Bs0→π+π-) <1.2×10-6 at 90%C.L. © 2009 The American Physical Society.
2009
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of new charmless decays of bottom hadrons / Aaltonen, T., Adelman, J., Akimoto, T., Gonzalez, B.a., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Apresyan, A., Arisawa, T., Artikov, A., Ashmanskas, W., Attal, A., Aurisano, A., Azfar, F., Azzurri, P., Badgett, W., BARBARO GALTIERI, A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 103:3(2009). [10.1103/physrevlett.103.031801]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/225449
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