First observation of the decay $B_{s2}^*(5840)^0 \to B^{*+} K^-$ and studies of excited $B_s$ mesons

R. Aaij; C. Adrover; E. Aslanides; J. Cogan; R. Legac; O. Leroy; G. Mancinelli; E. Maurice; M. Perrin-Terrin; M. Sapunov; J. Serrano; A. Tsaregorodtsev; S. Barsuk; O. Callot; J. He; B. Jean-Marie; J. Lefrançois; F. Machefert; A. Martin Sanchez; M. Nicol; P. Robbe; M.-H. Schune; B. Viaud; I. Videau; E. Ben-Haim; M. Benayoun; P. David; L. Del Buono; A. Martens; Z.J. Ajaltouni; O. Deschamps; E. Cogneras; I. El Rifai; P. Henrard; M. Hoballah; M. Jahjah Hussein; R. Lefèvre; L. Li Gioi; S. Monteil; V. Niess; P. Perret; D.A. Roa Romero; K. Sobczak; I. De Bonis; D. Decamp; Ph. Ghez; P. Hopchev; J.-P. Lees; I.V. Machikhiliyan; M.-N. Minard; B. Pietrzyk; W. Qian; S. T'Jampens; V. Tisserand; E. Tournefier

HAL: in2p3-00757461, version 1

arXiv: 1211.5994

DOI: 10.1103/PhysRevLett.110.151803

Detailed view

Export this paper

Physical Review Letters 110 (2013) 151803

First observation of the decay $B_{s2}^*(5840)^0 \to B^{*+} K^-$ and studies of excited $B_s$ mesons

R. Aaij, C. Adrover¹, E. Aslanides¹, J. Cogan¹, R. Legac¹, O. Leroy¹, G. Mancinelli¹, E. Maurice¹, M. Perrin-Terrin¹, M. Sapunov¹, J. Serrano¹, A. Tsaregorodtsev¹, S. Barsuk², O. Callot², J. He², B. Jean-Marie², J. Lefrançois², F. Machefert², A. Martin Sanchez², M. Nicol², P. Robbe², M.-H. Schune², B. Viaud², I. Videau², E. Ben-Haim³, M. Benayoun³, P. David³, L. Del Buono³, A. Martens³, Z.J. Ajaltouni⁴, O. Deschamps⁴, E. Cogneras⁴, I. El Rifai⁴, P. Henrard⁴, M. Hoballah⁴, M. Jahjah Hussein⁴, R. Lefèvre⁴, L. Li Gioi⁴, S. Monteil⁴, V. Niess⁴, P. Perret⁴, D.A. Roa Romero⁴, K. Sobczak⁴, I. De Bonis⁵, D. Decamp⁵, Ph. Ghez⁵, P. Hopchev⁵, J.-P. Lees⁵, I.V. Machikhiliyan⁵, M.-N. Minard⁵, B. Pietrzyk⁵, W. Qian⁵, S. T'Jampens⁵, V. Tisserand⁵, E. Tournefier⁵

For the LHCb collaboration(s)

(2013)

Properties of the orbitally excited (L=1) $B_s$ states are studied using 1.0 fb$^{-1}$ of pp collisions at $\sqrt{s} =7$ TeV collected with the LHCb detector. The first observation of the $B_{s2}^*(5840)^0$ meson decaying to $B^{*+} K^- is reported, and the corresponding branching fraction measured relative to the $B^+ K^-$ decay mode. The $B_{s1}(5830)^0 \to B^{*+} K^-$ decay is observed as well. The width of the $B_{s2}^*(5840)^0$ 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 $B_{s2}^*(5840)^0 \to B^{*+} K^-$ decay favours the spin-parity assignment $J^P = 2^+$ for the $B_{s2}^*(5840)^0$ meson. In addition, the most precise measurement of the mass difference $m(B^{*+})-m(B^+) = 45.01 \pm 0.30 (stat) \pm 0.23 (syst)$ MeV/$c^2$ is obtained.

1:	CPPM - Centre de Physique des Particules de Marseille

2:	LAL - Laboratoire de l'Accélérateur Linéaire

3:	LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies

4:	LPC-CLERMONT - Laboratoire de Physique Corpusculaire de Clermont-Ferrand

5:	LAPP - Laboratoire d'Annecy le Vieux de Physique des Particules

Subject(s)

Physics/High Energy Physics - Experiment

Fulltext link:

http://fr.arXiv.org/abs/1211.5994


in2p3-00757461, version 1
http://hal.in2p3.fr/in2p3-00757461
oai:hal.in2p3.fr:in2p3-00757461
From: Danielle Cristofol <>
Submitted for: Renaud Le Gac <>
Submitted on: Tuesday, 27 November 2012 09:29:34
Updated on: Tuesday, 16 April 2013 14:26:47