Search for B0 meson decays into Λ and missing energy with a hadronic tagging method at Belle

(Belle Collaboration)

doi:10.1103/PhysRevD.105.L051101

Search for B0 meson decays into Λ and missing energy with a hadronic tagging method at Belle

(Belle Collaboration)

Department of Physics

Pacific Northwest National Laboratory
The Graduate University for Advanced Studies
High Energy Accelerator Research Organization, Tsukuba
The University of Tokyo
Brookhaven National Laboratory
University of Cincinnati
Higher School of Economics
German Electron Synchrotron
Institute for High Energy Physics
University of Mississippi
University of Hawai'i at Mānoa
Indian Institute of Science Education and Research Mohali
Indian Institute of Technology Guwahati
Charles University
Jožef Stefan Institute
RAS - P.N. Lebedev Physics Institute
H. Niewodniczanski Institute of Nuclear Physics
University of Maribor
National Institute for Nuclear Physics
University of Naples Federico II
Fu Jen Catholic University
National Taiwan University
National Central University
Hanyang University
Gyeongsang National University
Sungkyunkwan University
Indian Institute of Technology Hyderabad
Wayne State University
Malaviya National Institute of Technology
Fudan University
University of Melbourne
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
Panjab University
Virginia Polytechnic Institute and State University
Karlsruhe Institute of Technology
University of Pittsburgh

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

We present a search for the decays of B0 mesons into a final state containing a Λ baryon and missing energy. These results are obtained from a 711 fb-1 data sample that contains 772×106 BB¯ pairs and was collected near the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode and require the remainder of the event to consist of only a single Λ. No evidence for these decays is found, and we set 90% confidence level upper limits on the branching fractions in the range 2.1-3.8×10-5. This measurement provides the world's most restrictive limits, with implications for baryogenesis and dark matter production.

Original language	English
Article number	L051101
Journal	Physical Review D
Volume	105
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.105.L051101
State	Published - 1 Mar 2022

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10.1103/PhysRevD.105.L051101

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@article{cddb6e84d5a54e058a5ee9b772a3c22f,

title = "Search for B0 meson decays into Λ and missing energy with a hadronic tagging method at Belle",

abstract = "We present a search for the decays of B0 mesons into a final state containing a Λ baryon and missing energy. These results are obtained from a 711 fb-1 data sample that contains 772{\texttimes}106 BB¯ pairs and was collected near the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode and require the remainder of the event to consist of only a single Λ. No evidence for these decays is found, and we set 90\% confidence level upper limits on the branching fractions in the range 2.1-3.8{\texttimes}10-5. This measurement provides the world's most restrictive limits, with implications for baryogenesis and dark matter production.",

author = "\{(Belle Collaboration)\} and C. Hadjivasiliou and Fulsom, \{B. G.\} and Strube, \{J. F.\} and I. Adachi and H. Aihara and Asner, \{D. M.\} and H. Atmacan and T. Aushev and V. Babu and K. Belous and J. Bennett and M. Bessner and V. Bhardwaj and B. Bhuyan and T. Bilka and J. Biswal and D. Bodrov and J. Borah and A. Bozek and M. Bra{\v c}ko and P. Branchini and Browder, \{T. E.\} and A. Budano and M. Campajola and D. {\v C}ervenkov and Chang, \{M. C.\} and P. Chang and A. Chen and Cheon, \{B. G.\} and K. Chilikin and Cho, \{H. E.\} and Choi, \{S. K.\} and Y. Choi and S. Choudhury and D. Cinabro and S. Cunliffe and S. Das and \{De Pietro\}, G. and \{Di Capua\}, F. and Z. Dole{\v Z}al and Dong, \{T. V.\} and D. Dossett and D. Epifanov and T. Ferber and R. Garg and V. Gaur and A. Giri and P. Goldenzweig and T. Gu and Kang, \{K. H.\}",

note = "Publisher Copyright: {\textcopyright} 2022 authors.",

year = "2022",

month = mar,

day = "1",

doi = "10.1103/PhysRevD.105.L051101",

language = "English",

volume = "105",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "5",

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TY - JOUR

T1 - Search for B0 meson decays into Λ and missing energy with a hadronic tagging method at Belle

AU - (Belle Collaboration)

AU - Hadjivasiliou, C.

AU - Fulsom, B. G.

AU - Strube, J. F.

AU - Adachi, I.

AU - Aihara, H.

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aushev, T.

AU - Babu, V.

AU - Belous, K.

AU - Bennett, J.

AU - Bessner, M.

AU - Bhardwaj, V.

AU - Bhuyan, B.

AU - Bilka, T.

AU - Biswal, J.

AU - Bodrov, D.

AU - Borah, J.

AU - Bozek, A.

AU - Bračko, M.

AU - Branchini, P.

AU - Browder, T. E.

AU - Budano, A.

AU - Campajola, M.

AU - Červenkov, D.

AU - Chang, M. C.

AU - Chang, P.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, H. E.

AU - Choi, S. K.

AU - Choi, Y.

AU - Choudhury, S.

AU - Cinabro, D.

AU - Cunliffe, S.

AU - Das, S.

AU - De Pietro, G.

AU - Di Capua, F.

AU - DoleŽal, Z.

AU - Dong, T. V.

AU - Dossett, D.

AU - Epifanov, D.

AU - Ferber, T.

AU - Garg, R.

AU - Gaur, V.

AU - Giri, A.

AU - Goldenzweig, P.

AU - Gu, T.

AU - Kang, K. H.

PY - 2022/3/1

Y1 - 2022/3/1

N2 - We present a search for the decays of B0 mesons into a final state containing a Λ baryon and missing energy. These results are obtained from a 711 fb-1 data sample that contains 772×106 BB¯ pairs and was collected near the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode and require the remainder of the event to consist of only a single Λ. No evidence for these decays is found, and we set 90% confidence level upper limits on the branching fractions in the range 2.1-3.8×10-5. This measurement provides the world's most restrictive limits, with implications for baryogenesis and dark matter production.

AB - We present a search for the decays of B0 mesons into a final state containing a Λ baryon and missing energy. These results are obtained from a 711 fb-1 data sample that contains 772×106 BB¯ pairs and was collected near the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode and require the remainder of the event to consist of only a single Λ. No evidence for these decays is found, and we set 90% confidence level upper limits on the branching fractions in the range 2.1-3.8×10-5. This measurement provides the world's most restrictive limits, with implications for baryogenesis and dark matter production.

UR - https://www.scopus.com/pages/publications/85127428507

U2 - 10.1103/PhysRevD.105.L051101

DO - 10.1103/PhysRevD.105.L051101

M3 - Article

AN - SCOPUS:85127428507

SN - 2470-0010

VL - 105

JO - Physical Review D

JF - Physical Review D

IS - 5

M1 - L051101

ER -

Search for B0 meson decays into Λ and missing energy with a hadronic tagging method at Belle

Abstract

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