The properties of the orbitally excited (L=1) Bs0 states are studied by using 1.0 fb-1 of pp collisions at √s=7 TeV collected with the LHCb detector. The first observation of the Bs2*(5840)0meson decaying to B*+K- is reported, and the corresponding branching fraction measured relative to the B+K- decay mode. The Bs1(5830)0→B*+K- decay is observed as well. The width of the Bs2*(5840)0 state is measured for the first time, and the masses of the two states are determined with the highest precision to date. The observation of the Bs2*(5840) 0→B*+K- decay favors the spin-parity assignment JP=2+ for the Bs2*(5840)0 meson. In addition, the most precise measurement of the mass difference m(B* +)-m(B+)=45.01±0.30(stat)±0.23(syst) MeV/c2 is obtained. © 2013 CERN.

First observation of the decay Bs2*(5840) 0→B+K and studies of excited Bs0 mesons / R., A., C. A., B., A., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P. A., C., J. A., A., S., A., Y., A., L., A., J., A., R. B., A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 110:15(2013). [10.1103/physrevlett.110.151803]

First observation of the decay Bs2*(5840) 0→B+K and studies of excited Bs0 mesons

SARTI, ALESSIO;SCIUBBA, Adalberto;
2013

Abstract

The properties of the orbitally excited (L=1) Bs0 states are studied by using 1.0 fb-1 of pp collisions at √s=7 TeV collected with the LHCb detector. The first observation of the Bs2*(5840)0meson decaying to B*+K- is reported, and the corresponding branching fraction measured relative to the B+K- decay mode. The Bs1(5830)0→B*+K- decay is observed as well. The width of the Bs2*(5840)0 state is measured for the first time, and the masses of the two states are determined with the highest precision to date. The observation of the Bs2*(5840) 0→B*+K- decay favors the spin-parity assignment JP=2+ for the Bs2*(5840)0 meson. In addition, the most precise measurement of the mass difference m(B* +)-m(B+)=45.01±0.30(stat)±0.23(syst) MeV/c2 is obtained. © 2013 CERN.
2013
01 Pubblicazione su rivista::01a Articolo in rivista
First observation of the decay Bs2*(5840) 0→B+K and studies of excited Bs0 mesons / R., A., C. A., B., A., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P. A., C., J. A., A., S., A., Y., A., L., A., J., A., R. B., A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 110:15(2013). [10.1103/physrevlett.110.151803]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/560358
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 66
  • ???jsp.display-item.citation.isi??? 46
social impact