Study of B, Bs mesons using heavy quark effective theory

Abstract

Inspired by the lower statistical information in the bottom {\bf sector, in this paper, we} calculate the masses and the strong decays of excited $B$ and $B_s$ mesons in the framework of heavy quark effective theory (HQET). Using an effective chiral Lagrangian approach based on heavy quark spin-flavor and light quark chiral symmetry, we explore the flavor independent parameters ${\Delta }_F^{(c)}={\Delta }_F^{(b)}$ and ${\lambda }_F^{(c)}={\lambda }_F^{(b)}$ to calculate the masses of experimentally unknown bottom mesons. Our predictions are consistent with the available experimental results and other theoretical studies. Their strong decay to the ground state bottom mesons plus light pseudoscalar mesons is calculated in terms of the square of the couplings $g_H$, $g_S$, $g_T$, $g_X$, $g_Y$, and $g_R$. The weighted average value of the couplings $g_H$, $g_S$ and $g_T$ {\bf is} obtained in the charm sector [Phys. Rev. D \textbf{86}, 054024 (2012)] by fitting the calculated decay widths with experimental measurements, which will be used in the present study to analyze the strong decays of excited open bottom mesons. Moreover, the ratio of the decay rates is also predicted, which can be countered with future experimental data.

arXiv comment13 pages Accepted for publication in EPJC

References in corpus (29)

• A review of the open charm and open bottom systems
• Excited Heavy-Light Systems and Hadronic Transitions
• Heavy-light meson spectroscopy and Regge trajectories in the relativistic quark model
• Heavy Mesons In A Relativistic Model
• Understanding $D_{sJ}(2317)$
• Properties of Orbitally Excited Heavy-Light Mesons
• New meson spectroscopy with open charm and beauty
• Strong decays of heavy-light mesons in a chiral quark model
• $B$ and $B_s$ Meson Spectroscopy
• Excited bottom and bottom-strange mesons in the quark model
• Spectra and M1 Decay Widths of Heavy-Light Mesons
• Excited Heavy Mesons Beyond Leading Order in the Heavy Quark Expansion
• Higher bottom and bottom-strange mesons
• Strong decays of higher excited heavy-light mesons in a chiral quark model
• Analysis of strong decays of the charmed mesons $D_J(2580)$, $D_J^{\ast }(2650)$, $D_J(2740)$, $D_J^{\ast }(2760)$, $D_J(3000)$, $D_J^{\ast }(3000)$
• Excited state mass spectra, Decay properties and Regge trajectories of charm and charm-strange mesons
• Spectroscopy, Decay properties and Regge trajectories of the $B$ and $B_s$ mesons
• Decays and spectrum of bottom and bottom strange mesons
• The effect of $B\pi$ continuum in the QCD sum rules for the $(0^{+},1^{+})$ heavy meson doublet in HQET
• Near Mass Degeneracy in the Scalar Meson Sector: Implications for $B_{(s)0}^{\ast }$ and $B_{(s)1}^{\prime }$ Mesons
• $D_{s3}^{\ast }(2860)$ and $D_{s1}^{\ast }(2860)$ as the 1D $c\bar{s}$ states
• Analysis of strong decays of charmed mesons $D_2^{\ast }(2460)$, $D_0(2560)$, $D_2(2740)$, $D_1(3000)$, $D_2^{\ast }(3000)$ and their spin partners $D_1^{\ast }(2680)$, $D_3^{\ast }(2760)$ and $D_0^{\ast }(3000)$
• Regge-like spectra of excited singly heavy mesons
• Chiral Particle Decay of Heavy-Light Mesons in a Relativistic Potential Model
• Effective Heavy Quark Theory
• Excited heavy meson decays to light vector mesons: implications for spectroscopy
• The analysis of the excited bottom and bottom strange states $B_1(5721)$, $B_2^{\ast }(5747)$, $B_{s1}(5830)$, $B_{s2}^{\ast }(5840)$, $B_J(5840)$ and $B_J(5970)$ in B meson family
• Placing the newly observed state $B_J(5840)$ in bottom spectra along with states $B_1(5721)$, $B_2^{\ast }(5747)$, $B_{s1}(5830)$, $B_{2s}^{\ast }(5840)$ and $B_J(5970)$
• Strong decays analysis of excited nonstrange charmed mesons: Implications for spectroscopy

Cited by in corpus (2)

• The assignments of the $B_s$ mesons within the screened potential model and ${}^3{P}_0$ model
• Placing of the recently observed bottom strange state $B_{sJ}(6063)$ and $B_{sJ}(6114)$ in bottom spectra