Search for B+→K+ν¯ν Decays Using an Inclusive Tagging Method at Belle II

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Search for B+→K+ν¯ν Decays Using an Inclusive Tagging Method at Belle II. / Belle II Collaboration.

In: Physical Review Letters, Vol. 127, No. 18, 181802, 29.10.2021, p. 181802.

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

Harvard

Belle II Collaboration 2021, 'Search for B+→K+ν¯ν Decays Using an Inclusive Tagging Method at Belle II', Physical Review Letters, vol. 127, no. 18, 181802, pp. 181802. https://doi.org/10.1103/PhysRevLett.127.181802

APA

Belle II Collaboration (2021). Search for B+→K+ν¯ν Decays Using an Inclusive Tagging Method at Belle II. Physical Review Letters, 127(18), 181802. [181802]. https://doi.org/10.1103/PhysRevLett.127.181802

Vancouver

Belle II Collaboration. Search for B+→K+ν¯ν Decays Using an Inclusive Tagging Method at Belle II. Physical Review Letters. 2021 Oct 29;127(18):181802. 181802. doi: 10.1103/PhysRevLett.127.181802

Author

Belle II Collaboration. / Search for B+→K+ν¯ν Decays Using an Inclusive Tagging Method at Belle II. In: Physical Review Letters. 2021 ; Vol. 127, No. 18. pp. 181802.

BibTeX

@article{e4db7e4413a74f7ea3957aa1d5e62af7,

title = "Search for B+→K+ν¯ν Decays Using an Inclusive Tagging Method at Belle II",

abstract = "A search for the flavor-changing neutral-current decay B^{+}→K^{+}νν[over ¯] is performed at the Belle II experiment at the SuperKEKB asymmetric energy electron-positron collider. The data sample corresponds to an integrated luminosity of 63 fb^{-1} collected at the ϒ(4S) resonance and a sample of 9 fb^{-1} collected at an energy 60 MeV below the resonance. Because the measurable decay signature involves only a single charged kaon, a novel measurement approach is used that exploits not only the properties of the B^{+}→K^{+}νν[over ¯] decay, but also the inclusive properties of the other B meson in the ϒ(4S)→BB[over ¯] event, to suppress the background from other B meson decays and light-quark pair production. This inclusive tagging approach offers a higher signal efficiency compared to previous searches. No significant signal is observed. An upper limit on the branching fraction of B^{+}→K^{+}νν[over ¯] of 4.1×10^{-5} is set at the 90% confidence level.",

author = "{Belle II Collaboration} and F. Abudin{\'e}n and I. Adachi and K. Adamczyk and P. Ahlburg and H. Aihara and N. Akopov and A. Aloisio and {Anh Ky}, N. and Asner, {D. M.} and H. Atmacan and T. Aushev and V. Aushev and A. Baur and V. Babu and S. Baehr and P. Bambade and SW Banerjee and S. Bansal and J. Baudot and J. Becker and Behera, {P. K.} and Bennett, {J. V.} and E. Bernieri and Bernlochner, {F. U.} and M. Bertemes and E. Bertholet and M. Bessner and S. Bettarini and F. Bianchi and T. Bilka and D. Biswas and A. Bozek and M. Bra{\v c}ko and P. Branchini and N. Braun and S. Eidelman and D. Epifanov and N. Gabyshev and A. Garmash and K. Gudkova and A. Korobov and E. Kovalenko and P. Krokovny and A. Kuzmin and D. Matvienko and M. Remnev and B. Shwartz and Usov, {Y. V.} and A. Vinokurova and V. Zhilich",

note = "Publisher Copyright: {\textcopyright} 2021 Published by the American Physical Society",

year = "2021",

month = oct,

day = "29",

doi = "10.1103/PhysRevLett.127.181802",

language = "English",

volume = "127",

pages = "181802",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "18",

}

RIS

TY - JOUR

T1 - Search for B+→K+ν¯ν Decays Using an Inclusive Tagging Method at Belle II

AU - Belle II Collaboration

AU - Abudinén, F.

AU - Adachi, I.

AU - Adamczyk, K.

AU - Ahlburg, P.

AU - Aihara, H.

AU - Akopov, N.

AU - Aloisio, A.

AU - Anh Ky, N.

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aushev, T.

AU - Aushev, V.

AU - Baur, A.

AU - Babu, V.

AU - Baehr, S.

AU - Bambade, P.

AU - Banerjee, SW

AU - Bansal, S.

AU - Baudot, J.

AU - Becker, J.

AU - Behera, P. K.

AU - Bennett, J. V.

AU - Bernieri, E.

AU - Bernlochner, F. U.

AU - Bertemes, M.

AU - Bertholet, E.

AU - Bessner, M.

AU - Bettarini, S.

AU - Bianchi, F.

AU - Bilka, T.

AU - Biswas, D.

AU - Bozek, A.

AU - Bračko, M.

AU - Branchini, P.

AU - Braun, N.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Gudkova, K.

AU - Korobov, A.

AU - Kovalenko, E.

AU - Krokovny, P.

AU - Kuzmin, A.

AU - Matvienko, D.

AU - Remnev, M.

AU - Shwartz, B.

AU - Usov, Y. V.

AU - Vinokurova, A.

AU - Zhilich, V.

PY - 2021/10/29

Y1 - 2021/10/29

N2 - A search for the flavor-changing neutral-current decay B^{+}→K^{+}νν[over ¯] is performed at the Belle II experiment at the SuperKEKB asymmetric energy electron-positron collider. The data sample corresponds to an integrated luminosity of 63 fb^{-1} collected at the ϒ(4S) resonance and a sample of 9 fb^{-1} collected at an energy 60 MeV below the resonance. Because the measurable decay signature involves only a single charged kaon, a novel measurement approach is used that exploits not only the properties of the B^{+}→K^{+}νν[over ¯] decay, but also the inclusive properties of the other B meson in the ϒ(4S)→BB[over ¯] event, to suppress the background from other B meson decays and light-quark pair production. This inclusive tagging approach offers a higher signal efficiency compared to previous searches. No significant signal is observed. An upper limit on the branching fraction of B^{+}→K^{+}νν[over ¯] of 4.1×10^{-5} is set at the 90% confidence level.

AB - A search for the flavor-changing neutral-current decay B^{+}→K^{+}νν[over ¯] is performed at the Belle II experiment at the SuperKEKB asymmetric energy electron-positron collider. The data sample corresponds to an integrated luminosity of 63 fb^{-1} collected at the ϒ(4S) resonance and a sample of 9 fb^{-1} collected at an energy 60 MeV below the resonance. Because the measurable decay signature involves only a single charged kaon, a novel measurement approach is used that exploits not only the properties of the B^{+}→K^{+}νν[over ¯] decay, but also the inclusive properties of the other B meson in the ϒ(4S)→BB[over ¯] event, to suppress the background from other B meson decays and light-quark pair production. This inclusive tagging approach offers a higher signal efficiency compared to previous searches. No significant signal is observed. An upper limit on the branching fraction of B^{+}→K^{+}νν[over ¯] of 4.1×10^{-5} is set at the 90% confidence level.

UR - http://www.scopus.com/inward/record.url?scp=85118563553&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/f3b4b42d-6280-3b0d-8456-53500619b29f/

U2 - 10.1103/PhysRevLett.127.181802

DO - 10.1103/PhysRevLett.127.181802

M3 - Article

C2 - 34767404

AN - SCOPUS:85118563553

VL - 127

SP - 181802

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 18

M1 - 181802

ER -

ID: 34582847