Study of orbitally excitedBmesons and evidence for a newBπresonance

Abstract

Using the full CDF Run II data sample, we report evidence for a new resonance, which we refer to as Bð5970Þ, found simultaneously in the B 0 π þ and B þ π − mass distributions with a significance of 4.4 standard deviations. We further report the first study of resonances consistent with orbitally excited B þ mesons and an updated measurement of the properties of orbitally excited B 0 and B 0 s mesons. We measure the masses and widths of all states, as well as the relative production rates of the B 1 , B Ã 2 , and Bð5970Þ states and the branching fraction of the B Ã0 s2 state to either B Ãþ K − and B þ K − . Furthermore, we measure the production rates of the orbitally excited B 0;þ states relative to the B 0;þ ground state. Visitor from Università degli Studi di Napoli Federico I, I-80138 Napoli, Italy. STUDY OF ORBITALLY EXCITED B MESONS AND …PHYSICAL REVIEW D 90, 012013 (2014) 012013-3into Bπ final states. The properties of the orbitally excited and the new Bð5970Þ 0;þ states are compatible with isospin symmetry.

Isospin violating decays of positive parity $$B_s$$ B s mesons in HM $$\chi $$ χ PT

“…[5]. These authors determined the spectrum of B s 1P states and they found that the masses of B s1 (5830) 0 and B * s2 (5840) 0 agree very well with the experimental results [1][2][3][4]. They predicted also the existence of the spin zero positive parity state (J P = 0 + ) with the mass m B s0 = 5.711(13) (19) [10][11][12][22][23][24].…”

“…Two positive parity mesons B s states: the J P = 1 + state B s1 (5830) 0 and the J P = 2 + state B * s2 (5840) 0 were observed by the CDF and LHCb collaborations [1][2][3][4]. Recent lattice results [5,6], as well as other work [7][8][9][10][11][12][13][14][15], have indicated that the observed states are most likely members of the (1 + , 2 + ) doublet.…”

Spectroscopic assignments of the excited B-mesons

“…While the so-called exotic states not conforming to quark model states have received the bulk of the attention [2][3][4][5][6], states that appear to be conventional quark model states can provide a useful test of the continued utility of the quark model [7][8][9]. Over the last decade the D0 [10,11], CDF [12][13][14], LHCb [15,16] and CMS [17] hadron collider experiments have observed a number of excited bottom and bottom-strange mesons. We summarize the properties of these states in Table I where we quote the Particle Data Group (PDG) values, averaged over charge states [18].…”

B-meson spectroscopy in HQET at order1/m

“…CDF has claimed the observation of a resonant state B(5970) that may be interpreted as a B 0 state [16]. Lattice predictions for the radial excitation energies of the B system have been made in the framework of NRQCD [17,18] and HQET [19][20][21][22][23][24][25][26][27], but, with the exception of the most recent HQET studies, control of the continuum extrapolation has been limited, if possible at all.…”