Searches for Majorana neutrinos in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mo mathvariant="bold">−</mml:mo></mml:msup></mml:math>decays

Aaij, R.; Beteta, C. Abellán; Adeva, B.; Adinolfi, M.; Adrover, C.; Affolder, A.; Ajaltouni, Z.; Albrecht, J.; Alessio, F.; Alexander, M.; Alkhazov, G.; Cartelle, P. Alvarez; Alves, A. A.; Amato, S.; Amhis, Y.; Anderson, J.; Appleby, R. B.; Gutierrez, O. Aquines; Archilli, F.; Arrabito, L.; Артамонов, А.; Artuso, M.; Aslanides, E.; Auriemma, G.; Bachmann, S.; Back, J. J.; Bailey, D.; Balagura, V.; Baldini, W.; Barlow, R. J.; Barschel, C.; Barsuk, S.; Barter, W.; Bates, A.; Bauer, C.; Bauer, Th.; Bay, A.; Bediaga, I.; Belogurov, S.; Belous, K.; Belyaev, I.; Ben-Haim, E.; Benayoun, M.; Bencivenni, G.; Benson, S.; Benton, J.; Bernet, R.; Bettler, M. O.; Beuzekom, M. van; Bień, A.; Bifani, S.; Bird, T.; Bizzeti, A.; Bjørnstad, P. M.; Blake, T.; Blanc, F.; Blanks, C.; Blouw, J.; Blusk, S.; Bobrov, A.; Bocci, V.; Bondar, A.; Bondar, N.; Bonivento, W.; Borghi, S.; Borgia, A.; Bowcock, T. J. 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doi:10.1103/physrevd.85.112004

Cited by 64 publications

(45 citation statements)

References 22 publications

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“…[196,197]. These branching fraction limits imply a limit on, for example, the coupling |V μ4 | between ν μ and a Majorana neutrino with a mass in the range 1 < m N < 4 GeV/c 2 of |V μ4 | 2 < 5 × 10 −5 .…”

Section: Lepton Number Violationmentioning

confidence: 99%

“…The observation of B + → π + μ + μ − [86], the rarest B decay yet discovered, enables a new approach to measure the ratio of CKM matrix elements |V td /V ts |. Decays to final states containing same-sign leptons [197] allow searches for Majorana neutrinos complementary to those based on neutrinoless double beta decay. LHCb can also reach competitive sensitivity for some lepton flavour violating decays such as τ + → μ + μ − μ + [191].…”

Section: Rare Decaysmentioning

confidence: 99%

See 1 more Smart Citation

Implications of LHCb measurements and future prospects

Bharucha¹,

Bigi²,

Bobeth³

et al. 2013

Eur. Phys. J. C

Self Cite

170

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region at a hadron collider. This document discusses the implications of these first measurements on classes of extensions to the Standard Model, bearing in mind the interplay with the results of searches for on-shell production of new particles at ATLAS and CMS. The physics potential of an upgrade to the LHCb detector, which would allow an order of magnitude more data to be collected, is emphasised.

show abstract

Section: Lepton Number Violationmentioning

confidence: 99%

Section: Rare Decaysmentioning

confidence: 99%

Implications of LHCb measurements and future prospects

Bharucha¹,

Bigi²,

Bobeth³

et al. 2013

Eur. Phys. J. C

Self Cite

170

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show abstract

“…Complementary, for m N below 5 GeV, rare decays of B, D and K mesons or tau leptons are more appropriate [33][34][35][36][37]. In this work, we focus on neutrino masses within the window from 5 GeV to 20 GeV, using the exclusive processes…”

Section: Introductionmentioning

confidence: 99%

Search for sterile neutrinos decaying into pions at the LHC

et al. 2018

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We study the possibility to observe sterile neutrinos with masses in the range 5 GeV < m N < 20 GeV at the LHC, using the exclusive semileptonic modes involving pions, namely W → lN → nπll (n ¼ 1; 2; 3). The two pion and three pion modes require extrapolations of form factors to large time-like q 2 , which we do using vector dominance models as well as light front holographic QCD, with remarkable agreement. This mass region is difficult to explore with inclusive lljj modes or trilepton modes and impossible to explore in rare meson decays. While particle identification is a real challenge in these modes, vertex displacement due to the long living neutrino in the above mass range can greatly help reduce backgrounds. Assuming a sample of 10 9 W bosons at the end of the LHC Run 2, these modes could discover a sterile neutrino in the above mass range or improve the current bounds on the heavy-to-light lepton mixings by an order of magnitude, jU lN j 2 ∼ 2 × 10 −6 . Moreover, by studying the equal sign and opposite sign dileptons, the Majorana or Dirac character of the sterile neutrino may be revealed.

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“…The light neutrino masses in this model are generated from dimension-five lepton number violating (LNV) operator [4] that violates lepton number by two units and hence their Majorana nature can be confirmed by observing the distinctive LNV signal at experiments, such as neutrinoless double beta decay (0νββ) [5][6][7][8]. Additionally, the LNV signature can also be tested at colliders from direct searches [9][10][11][12][13], as well as through indirect searches from meson and tau decays [14][15][16][17][18][19]. While the light neutrinos can give dominant contribution in 0νββ, the LNV searches at collider and meson decays are however not sensitive to such small eV mass scale.…”

Section: Introductionmentioning

confidence: 99%

Constraining the right-handed gauge boson mass from lepton number violating meson decays in a low scale left-right model

2017

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We analyze the lepton number violating (LNV) meson decays that arise in a TeV scale Left Right Symmetry model. The right handed Majorana neutrino N along with the right handed or Standard Model gauge bosons mediate the meson decays and provide a resonant enhancement of the rates if the mass of N (MN ) lies in the range ∼ (100 MeV − 5 GeV). Using the expected upper limits on the number of events for the LNV decay modes M + 1 → + + π − (M1 = B, D, Ds, K), we derive constraints plausible on the mass of the right handed charged gauge boson by future searches at the ongoing NA62 and LHCb experiments at CERN, the upcoming Belle II at SuperKEK, as well as at the proposed future experiments, SHiP and FCC-ee. These bounds are complimentary to the limits from same-sign dilepton search at Large Hadron Collider (LHC). The very high intensity of Charmed mesons expected to be produced at SHiP will result in a far more stringent bound, MW R > 18.4 TeV (corresponding to MN = 1.46 GeV), than the other existing bounds from collider and neutrinoless double beta decay searches.

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Searches for Majorana neutrinos inB−decays

Cited by 64 publications

References 22 publications

Implications of LHCb measurements and future prospects

Implications of LHCb measurements and future prospects

Search for sterile neutrinos decaying into pions at the LHC

Constraining the right-handed gauge boson mass from lepton number violating meson decays in a low scale left-right model

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