Sensitivity bounds on heavy neutrino mixing $|U_{\mu N}|^2$ and $|U_{\tau N}|^2$ from LHCb upgrade

Decays of heavy pseudoscalar mesons B, Bc, Bs, and Ds at the LHCb upgrade are considered, which produce either two equal sign muons or taus. In addition, we consider the analogous decays with opposite sign muons or taus. All these decays are considered to be mediated by a heavy on-shell neutrino N....

Descripción completa

Detalles Bibliográficos
Autores principales: Cvetič, Gorazd, Kim, C.S.
Lenguaje:eng
Publicado: 2019
Materias:
hep-ph
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.100.015014
http://cds.cern.ch/record/2759247
_version_ 1780970211128639488
author Cvetič, Gorazd
Kim, C.S.
author_facet Cvetič, Gorazd
Kim, C.S.
author_sort Cvetič, Gorazd
collection CERN
description Decays of heavy pseudoscalar mesons B, Bc, Bs, and Ds at the LHCb upgrade are considered, which produce either two equal sign muons or taus. In addition, we consider the analogous decays with opposite sign muons or taus. All these decays are considered to be mediated by a heavy on-shell neutrino N. Such decays of B mesons, if not detected, will give, in general, stringent upper bounds on the heavy-light mixing parameter |UμN|2 as a function of the neutrino mass MN∼1  GeV, principally due to the large expected number of produced mesons B. While some of the decays of the other mentioned mesons are attractive due to a weaker Cabibbo-Kobayashi-Maskawa suppression, the expected produced number of such mesons is significantly smaller that of B’s; therefore, the sensitivity bounds from such decays are, in general, comparable or less restrictive. When τ pairs are produced, only two types of such decays are significant: B±, Bc±→τ±τ±π∓ (and τ±τ∓π±), giving us stringent upper bounds on |UτN|2; the other decays with a pair of τ, such as B0→D(*)-τ+τ+π- (and D(*)-τ+τ-π+), are prohibited or very suppressed by kinematics.
id cern-2759247
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2019
record_format invenio
spelling cern-27592472021-05-04T07:49:34Zdoi:10.1103/PhysRevD.100.015014http://cds.cern.ch/record/2759247engCvetič, GorazdKim, C.S.Sensitivity bounds on heavy neutrino mixing $|U_{\mu N}|^2$ and $|U_{\tau N}|^2$ from LHCb upgradehep-phParticle Physics - PhenomenologyDecays of heavy pseudoscalar mesons B, Bc, Bs, and Ds at the LHCb upgrade are considered, which produce either two equal sign muons or taus. In addition, we consider the analogous decays with opposite sign muons or taus. All these decays are considered to be mediated by a heavy on-shell neutrino N. Such decays of B mesons, if not detected, will give, in general, stringent upper bounds on the heavy-light mixing parameter |UμN|2 as a function of the neutrino mass MN∼1  GeV, principally due to the large expected number of produced mesons B. While some of the decays of the other mentioned mesons are attractive due to a weaker Cabibbo-Kobayashi-Maskawa suppression, the expected produced number of such mesons is significantly smaller that of B’s; therefore, the sensitivity bounds from such decays are, in general, comparable or less restrictive. When τ pairs are produced, only two types of such decays are significant: B±, Bc±→τ±τ±π∓ (and τ±τ∓π±), giving us stringent upper bounds on |UτN|2; the other decays with a pair of τ, such as B0→D(*)-τ+τ+π- (and D(*)-τ+τ-π+), are prohibited or very suppressed by kinematics.Decays of heavy pseudoscalar mesons $B$, $B_c$, $B_s$ and $D_s$ at LHCb upgrade are considered, which produce either two equal sign muons or taus. In addition, we consider the analogous decays with opposite sign muons or taus. All these decays are considered to be mediated by a heavy on-shell neutrino $N$. Such decays of $B$ mesons, if not detected, will give in general stringent upper bounds on the heavy-light mixing parameter $|U_{\mu N}|^2$ as a function of the neutrino mass $M_N \sim 1$ GeV, principally due to the large expected number of produced mesons $B$. While some of the decays of the other mentioned mesons are attractive due to a weaker CKM-suppression, the expected produced number of such mesons is significantly smaller that that of $B$'s; therefore, the sensitivity bounds from such decays are in general comparable or less restrictive. When $\tau$ pairs are produced, only two types of such decays are significant: $B^{\pm}, B_{c}^{\pm} \to \tau^{\pm} \tau^{\pm} \pi^{\mp}$ (and $\tau^{\pm} \tau^{\mp} \pi^{\pm}$), giving us stringent upper bounds on $|U_{\tau N}|^2$; the other decays with a pair of $\tau$, such as $B^0 \to D^{(*)-} \tau^+ \tau^+ \pi^-$ (and $D^{(*)-} \tau^+ \tau^- \pi^+$), are prohibited or very suppressed by kinematics.arXiv:1904.12858USM-TH-361oai:cds.cern.ch:27592472019-04-29
spellingShingle hep-ph
Particle Physics - Phenomenology
Cvetič, Gorazd
Kim, C.S.
Sensitivity bounds on heavy neutrino mixing $|U_{\mu N}|^2$ and $|U_{\tau N}|^2$ from LHCb upgrade
title Sensitivity bounds on heavy neutrino mixing $|U_{\mu N}|^2$ and $|U_{\tau N}|^2$ from LHCb upgrade
title_full Sensitivity bounds on heavy neutrino mixing $|U_{\mu N}|^2$ and $|U_{\tau N}|^2$ from LHCb upgrade
title_fullStr Sensitivity bounds on heavy neutrino mixing $|U_{\mu N}|^2$ and $|U_{\tau N}|^2$ from LHCb upgrade
title_full_unstemmed Sensitivity bounds on heavy neutrino mixing $|U_{\mu N}|^2$ and $|U_{\tau N}|^2$ from LHCb upgrade
title_short Sensitivity bounds on heavy neutrino mixing $|U_{\mu N}|^2$ and $|U_{\tau N}|^2$ from LHCb upgrade
title_sort sensitivity bounds on heavy neutrino mixing $|u_{\mu n}|^2$ and $|u_{\tau n}|^2$ from lhcb upgrade
topic hep-ph
Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.100.015014
http://cds.cern.ch/record/2759247
work_keys_str_mv AT cveticgorazd sensitivityboundsonheavyneutrinomixingumun2andutaun2fromlhcbupgrade
AT kimcs sensitivityboundsonheavyneutrinomixingumun2andutaun2fromlhcbupgrade

Ejemplares similares