nLab
leptonic decay

Contents

Context

Fields and quanta

fields and particles in particle physics

and in the 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

hadrons (bound states of the above quarks)

solitons

in grand unified theory

minimally extended supersymmetric standard model

superpartners

bosinos:

sfermions:

dark matter candidates

Exotica

auxiliary fields

Contents

Idea

In the context of quantum hadrodynamics, the decay-mode of a meson via the weak interaction (i.e. by exchange of a W-boson or Z-boson) into a pair of leptons is called (shown are Feynman diagrams of example decays of kaons):

All this is in contrast to

  • non-leptonic decays where other mesons but no leptons are produced:

References

General

  • L. G. Landsberg, Electromagnetic decays of light mesons, Physics Reports Volume 128, Issue 6, November 1985, Pages 301-376 (doi:10.1016/0370-1573(85)90129-2)

  • 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)

Purely leptonic decays

  • Tome Anticic, Purely leptonic decays of heavy flavor mesons 1997 (spire:454066)

Leptonic decays of pions

Discussion of leptonic decays of pions:

General

  • Dinko Pocanic, Emil Frlez, Andries van der Schaaf, Experimental study of rare charged pion decays, Journal of Physics G: Nuclear and Particle Physics, Volume 41, Number 11 (arXiv:1407.2865)

Purely leptonic decays

See at vector meson dominance.

Raditive leptonic decays

Discussion of radiative leptonic decays of the pion (see also at Dalitz decay)

  • Rene Unterdorfer, Hannes Pichl, On the Radiative Pion Decay, Eur. Phys. J. C55:273-283, 2008 (arXiv:0801.2482)

  • V. Bolotov, The radiative pion decays (pdf)

Leptonic decays of ω\omega-mesons

Discussion of leptonic decays of omega-mesons:

  • I. N. Mishustin, L. M. Satarov, H. Stoecker, W. Greiner, Dilepton production by bremsstrahlung of meson fields in nuclear collisions, Phys. Rev. C57:2552-2558, 1998 (arXiv:hep-ph/9709384)

  • Anastasiya Kuzmenko et al. , The Study of the Conversion Decays of Omega Meson to π 0\pi^0 Meson and e +e e^+ e^- Pair with the CMD-3 Detector, CERN Proceedings Archives Vol 1 (2017) (doi:10.23727/CERN-Proceedings-2017-001.91

Leptonic decays of B-mesons

Discussion of leptonic decays of B-mesons:

General

Fully leptonic decays

  • M. Lattery, Fully Leptonic Decays of B Mesons, 1996 (spire)

Semileptonic decays

  • 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)

In relation to flavor anomalies

Discussion of leptonic decays in view of observed flavour anomalies:

  • N. Penalva, E. Hernández, J. Nieves, Hadron and lepton tensors in semileptonic decays including new physics (arXiv:2004.08253)

  • N. Penalva, E. Hernández, J. Nieves, B¯ cη c\bar B_c \to \eta_c, B¯ cJ/ψ\bar B_c \to J/\psi and B¯D (*)\bar B \to D^{(\ast)} semileptonic decays including new physics (arXiv:2007.12590)

Last revised on April 7, 2021 at 13:56:44. See the history of this page for a list of all contributions to it.