Abstract
A search for the lepton-flavour violating decays Bs0 → e±μ∓ and B0 → e±μ∓ is performed based on a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb−1, collected with the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yields are consistent with the background-only hypothesis. Upper limits on the branching fraction of the Bs0 → e±μ∓ decays are evaluated both in the hypotheses of an amplitude completely dominated by the heavy eigenstate and by the light eigenstate. The results are @@ℬ(Bs0→e)<6.3(5.4)×10−9 and @@ℬ(Bs0→e)<7.2(6.0)×10−9 at 95% (90%) confidence level, respectively. The upper limit on the branching fraction of the B0 → e±μ∓ decay is also evaluated, obtaining @@ℬ(B0→e)<1.3(1.0)×10−9 at 95% (90%) confidence level. These are the strongest limits on these decays to date.[Figure not available: see fulltext.].
| Original language | English |
|---|---|
| Article number | 78 |
| Journal | Journal of High Energy Physics |
| Volume | 2018 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Mar 2018 |
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Keywords
- B physics
- Branching fraction
- Flavor physics
- Hadron-Hadron scattering (experiments)
- Rare decay
ASJC Scopus subject areas
- Nuclear and High Energy Physics
Cite this
Search for the lepton-flavour violating decays B (s)0 → e ± μ ∓. / The LHCb Collaboration.
In: Journal of High Energy Physics, Vol. 2018, No. 3, 78, 01.03.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Search for the lepton-flavour violating decays B (s)0 → e ± μ ∓
AU - The LHCb Collaboration
AU - Aaij, R.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Ajaltouni, Z.
AU - Akar, S.
AU - Albrecht, J.
AU - Alessio, F.
AU - Alexander, M.
AU - Alfonso Albero, A.
AU - Ali, S.
AU - Alkhazov, G.
AU - Alvarez Cartelle, P.
AU - Alves, A. A.
AU - Amato, S.
AU - Amerio, S.
AU - Amhis, Y.
AU - An, L.
AU - Anderlini, L.
AU - Andreassi, G.
AU - Andreotti, M.
AU - Andrews, J. E.
AU - Appleby, R. B.
AU - Archilli, F.
AU - d’Argent, P.
AU - Arnau Romeu, J.
AU - Artamonov, A.
AU - Artuso, M.
AU - Aslanides, E.
AU - Atzeni, M.
AU - Auriemma, G.
AU - Baalouch, M.
AU - Babuschkin, I.
AU - Bachmann, S.
AU - Back, J. J.
AU - Badalov, A.
AU - Baesso, C.
AU - Baker, S.
AU - Balagura, V.
AU - Baldini, W.
AU - Baranov, A.
AU - Barlow, R. J.
AU - Barschel, C.
AU - Barsuk, S.
AU - Barter, W.
AU - Baryshnikov, F.
AU - Batozskaya, V.
AU - Battista, V.
AU - Mazurov, A.
AU - Petrov, A.
AU - Vagner, A.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - A search for the lepton-flavour violating decays Bs0 → e±μ∓ and B0 → e±μ∓ is performed based on a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb−1, collected with the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yields are consistent with the background-only hypothesis. Upper limits on the branching fraction of the Bs0 → e±μ∓ decays are evaluated both in the hypotheses of an amplitude completely dominated by the heavy eigenstate and by the light eigenstate. The results are @@ℬ(Bs0→e)<6.3(5.4)×10−9 and @@ℬ(Bs0→e)<7.2(6.0)×10−9 at 95% (90%) confidence level, respectively. The upper limit on the branching fraction of the B0 → e±μ∓ decay is also evaluated, obtaining @@ℬ(B0→e)<1.3(1.0)×10−9 at 95% (90%) confidence level. These are the strongest limits on these decays to date.[Figure not available: see fulltext.].
AB - A search for the lepton-flavour violating decays Bs0 → e±μ∓ and B0 → e±μ∓ is performed based on a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb−1, collected with the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yields are consistent with the background-only hypothesis. Upper limits on the branching fraction of the Bs0 → e±μ∓ decays are evaluated both in the hypotheses of an amplitude completely dominated by the heavy eigenstate and by the light eigenstate. The results are @@ℬ(Bs0→e)<6.3(5.4)×10−9 and @@ℬ(Bs0→e)<7.2(6.0)×10−9 at 95% (90%) confidence level, respectively. The upper limit on the branching fraction of the B0 → e±μ∓ decay is also evaluated, obtaining @@ℬ(B0→e)<1.3(1.0)×10−9 at 95% (90%) confidence level. These are the strongest limits on these decays to date.[Figure not available: see fulltext.].
KW - B physics
KW - Branching fraction
KW - Flavor physics
KW - Hadron-Hadron scattering (experiments)
KW - Rare decay
UR - http://www.scopus.com/inward/record.url?scp=84992132586&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84992132586&partnerID=8YFLogxK
U2 - 10.1007/JHEP03(2018)078
DO - 10.1007/JHEP03(2018)078
M3 - Article
VL - 2018
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1126-6708
IS - 3
M1 - 78
ER -