nLab
B meson

Contents

Context

Fields and quanta

field (physics)

standard model of particle physics

force field gauge bosons

scalar bosons

matter field fermions (spinors, Dirac fields)

flavors of fundamental fermions in the
standard model of particle physics:
generation of fermions1st generation2nd generation3d generation
quarks (qq)
up-typeup quark (uu)charm quark (cc)top quark (tt)
down-typedown quark (dd)strange quark (ss)bottom quark (bb)
leptons
chargedelectronmuontauon
neutralelectron neutrinomuon neutrinotau neutrino
bound states:
mesonslight mesons:
pion (udu d)
ρ-meson (udu d)
ω-meson (udu d)
f1-meson
a1-meson
strange-mesons:
ϕ-meson (ss¯s \bar s),
kaon, K*-meson (usu s, dsd s)
eta-meson (uu+dd+ssu u + d d + s s)

charmed heavy mesons:
D-meson (uc u c, dcd c, scs c)
J/ψ-meson (cc¯c \bar c)
bottom heavy mesons:
B-meson (qbq b)
ϒ-meson (bb¯b \bar b)
baryonsnucleons:
proton (uud)(u u d)
neutron (udd)(u d d)

(also: antiparticles)

effective particles

hadron (bound states of the above quarks)

solitons

minimally extended supersymmetric standard model

superpartners

bosinos:

sfermions:

dark matter candidates

Exotica

auxiliary fields

Contents

Idea

In the standard model of particle physics a B-meson is a meson which is a bound state of a bottom quark and any other quark from the first two generations of fermions (up quark or down quark or strange quark or charm quark).

Hence the class of B-mesons goes along side that of K-mesons (light mnesons with a strange quark) and D-mesons (light meson with a charm quark).

flavors of fundamental fermions in the
standard model of particle physics:
generation of fermions1st generation2nd generation3d generation
quarks (qq)
up-typeup quark (uu)charm quark (cc)top quark (tt)
down-typedown quark (dd)strange quark (ss)bottom quark (bb)
leptons
chargedelectronmuontauon
neutralelectron neutrinomuon neutrinotau neutrino
bound states:
mesonslight mesons:
pion (udu d)
ρ-meson (udu d)
ω-meson (udu d)
f1-meson
a1-meson
strange-mesons:
ϕ-meson (ss¯s \bar s),
kaon, K*-meson (usu s, dsd s)
eta-meson (uu+dd+ssu u + d d + s s)

charmed heavy mesons:
D-meson (uc u c, dcd c, scs c)
J/ψ-meson (cc¯c \bar c)
bottom heavy mesons:
B-meson (qbq b)
ϒ-meson (bb¯b \bar b)
baryonsnucleons:
proton (uud)(u u d)
neutron (udd)(u d d)

Current experiments studying B-meson physics are the \

All these are increasingly seeing flavour anomalies (see there) in BB-meson decays at high statistical significance, pointing to physics beyond the standard model of particle physics.

References

General

See also

Semileptonic decay

semileptonic decay:

Review:

  • R. Casalbuoni, A. Deandrea, N.Di Bartolomeo, F. Feruglio, R. Gatto, G. Nardulli, Phenomenology of Heavy Meson Chiral Lagrangians, Phys. Rept. 281:145-238, 1997 (arXiv:hep-ph/9605342)

  • Jochen Dingfelder, Thomas Mannel, Leptonic and semileptonic decays of BB mesons, Rev. Mod. Phys. 88 (2016) 3, 035008 (spire:1488176, doi:10.1103/RevModPhys.88.035008)

See also

  • J. P. Lees et al. (BABAR Collaboration), Measurement of the B +ω +νB^+ \to \omega \ell^+ \nu branching fraction with semileptonically tagged B mesons, Phys. Rev. D 88, 072006 (2013) (doi:10.1103/PhysRevD.88.072006)

  • Xian-Wei Kang, Tao Luo, Yi Zhang, Ling-Yun Dai, Chao Wang, Semileptonic BB and B sB_s decays involving scalar and axial-vector mesons, Eur. Phys. J. C 78, 909 (2018) (doi:10.1140/epjc/s10052-018-6385-9)

Skyrme hadrodynamics with heavy quarks/mesons

Inclusion of heavy flavors into the Skyrme model for quantum hadrodynamics:

Inclusion of strange quarks/kaons

Inclusion of strange quarks/kaons into the Skyrme model:

Review:

Inclusion of charm quarks/D-mesons

Inclusion of charm quarks/D-mesons into the Skyrme model:

Inclusion of bottom quarks/B-mesons

Inclusion of further heavy flavors beyond strange quark/kaons, namely charm quarks/D-mesons and bottom quarks/B-mesons, into the Skyrme model:

  • Mannque Rho, D. O. Riska, Norberto Scoccola, The energy levels of the heavy flavour baryons in the topological soliton model, Zeitschrift für Physik A Hadrons and Nuclei volume 341, pages 343–352 (1992) (doi:10.1007/BF01283544)

  • Arshad Momen, Joseph Schechter, Anand Subbaraman, Heavy Quark Solitons: Strangeness and Symmetry Breaking, Phys. Rev. D49:5970-5978, 1994 (arXiv:hep-ph/9401209)

  • Yongseok Oh, Byung-Yoon Park, Dong-Pil Min, Heavy Baryons as Skyrmion with 1/m Q1/m_Q Corrections, Phys. Rev. D49 (1994) 4649-4658 (arXiv:hep-ph/9402205)

Review:

In holographic QCD

Discussion in holographic light front QCD:

  • Mohammad Ahmady, Holographic light-front QCD in B meson phenomenology (arXiv:2001.00266)

Last revised on May 7, 2020 at 10:13:07. See the history of this page for a list of all contributions to it.