Search for lepton-number- And baryon-number-violating tau decays at Belle

(Belle Collaboration)

doi:10.1103/PhysRevD.102.111101

Search for lepton-number- And baryon-number-violating tau decays at Belle

(Belle Collaboration)

Department of Physics

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

2 Citations (Scopus)

Abstract

We search for lepton-number- and baryon-number-violating decays τ-→p¯e+e-, pe-e-, p¯e+μ-, p¯e-μ+, p¯μ+μ-, and pμ-μ- using 921 fb-1 of data, equivalent to (841±12)×106 τ+τ- events, recorded with the Belle detector at the KEKB asymmetric-energy e+e- collider. In the absence of a signal, 90% confidence-level upper limits are set on the branching fractions of these decays in the range (1.8-4.0)×10-8. We set the world's first limits on the first four channels and improve the existing limits by an order of magnitude for the last two channels.

Original language	English
Article number	111101
Journal	Physical Review D
Volume	102
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.102.111101
Publication status	Published - 2020 Dec 24

Bibliographical note

Funding Information:
We acknowledge fruitful discussions with and helpful suggestions from S. Mahapatra (Utkal University), E. Passemar (Indiana University), and P. S. Bhupal Dev (Washington University). We thank the KEKB group for excellent operation of the accelerator; the KEK cryogenics group for efficient solenoid operations; and the KEK computer group, the NII, and PNNL/EMSL for valuable computing and SINET5 network support. We acknowledge support from MEXT, JSPS and Nagoya’s TLPRC (Japan); ARC (Australia); FWF (Austria); NSFC and CCEPP (China); MSMT (Czechia); CZF, DFG, EXC153, and VS (Germany); DAE and DST (India); INFN (Italy); MOE, MSIP, NRF, RSRI, FLRFAS project, GSDC of KISTI and KREONET/GLORIAD (Korea); MNiSW and NCN (Poland); MSHE, Agreement 14.W03.31.0026 (Russia); University of Tabuk (Saudi Arabia); ARRS (Slovenia); IKERBASQUE (Spain); SNSF (Switzerland); MOE and MOST (Taiwan); and DOE and NSF (USA).

Publisher Copyright:
© 2020 authors. Published by the American Physical Society.

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Access to Document

10.1103/PhysRevD.102.111101

Cite this

@article{6ff8df292f2f473ba5856eb6ae3b8273,

title = "Search for lepton-number- And baryon-number-violating tau decays at Belle",

abstract = "We search for lepton-number- and baryon-number-violating decays τ-→p¯e+e-, pe-e-, p¯e+μ-, p¯e-μ+, p¯μ+μ-, and pμ-μ- using 921 fb-1 of data, equivalent to (841±12)×106 τ+τ- events, recorded with the Belle detector at the KEKB asymmetric-energy e+e- collider. In the absence of a signal, 90% confidence-level upper limits are set on the branching fractions of these decays in the range (1.8-4.0)×10-8. We set the world's first limits on the first four channels and improve the existing limits by an order of magnitude for the last two channels.",

author = "{(Belle Collaboration)} and D. Sahoo and Mohanty, {G. B.} and K. Trabelsi and I. Adachi and K. Adamczyk and H. Aihara and {Al Said}, S. and Asner, {D. M.} and T. Aushev and R. Ayad and T. Aziz and V. Babu and S. Bahinipati and P. Behera and J. Bennett and M. Bessner and V. Bhardwaj and T. Bilka and J. Biswal and G. Bonvicini and A. Bozek and M. Bra{\v c}ko and Browder, {T. E.} and M. Campajola and L. Cao and D. {\v C}ervenkov and Chang, {M. C.} and P. Chang and V. Chekelian and A. Chen and Cheon, {B. G.} and K. Chilikin and Cho, {H. E.} and K. Cho and Choi, {S. K.} and Y. Choi and S. Choudhury and D. Cinabro and S. Cunliffe and S. Das and N. Dash and {De Nardo}, G. and {Di Capua}, F. and J. Dingfelder and Z. Dole{\v Z}al and Dong, {T. V.} and S. Dubey and S. Eidelman and D. Epifanov and Kwon, {Y. J.}",

note = "Funding Information: We acknowledge fruitful discussions with and helpful suggestions from S. Mahapatra (Utkal University), E. Passemar (Indiana University), and P. S. Bhupal Dev (Washington University). We thank the KEKB group for excellent operation of the accelerator; the KEK cryogenics group for efficient solenoid operations; and the KEK computer group, the NII, and PNNL/EMSL for valuable computing and SINET5 network support. We acknowledge support from MEXT, JSPS and Nagoya{\textquoteright}s TLPRC (Japan); ARC (Australia); FWF (Austria); NSFC and CCEPP (China); MSMT (Czechia); CZF, DFG, EXC153, and VS (Germany); DAE and DST (India); INFN (Italy); MOE, MSIP, NRF, RSRI, FLRFAS project, GSDC of KISTI and KREONET/GLORIAD (Korea); MNiSW and NCN (Poland); MSHE, Agreement 14.W03.31.0026 (Russia); University of Tabuk (Saudi Arabia); ARRS (Slovenia); IKERBASQUE (Spain); SNSF (Switzerland); MOE and MOST (Taiwan); and DOE and NSF (USA). Publisher Copyright: {\textcopyright} 2020 authors. Published by the American Physical Society.",

year = "2020",

month = dec,

day = "24",

doi = "10.1103/PhysRevD.102.111101",

language = "English",

volume = "102",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "11",

}

TY - JOUR

T1 - Search for lepton-number- And baryon-number-violating tau decays at Belle

AU - (Belle Collaboration)

AU - Sahoo, D.

AU - Mohanty, G. B.

AU - Trabelsi, K.

AU - Adachi, I.

AU - Adamczyk, K.

AU - Aihara, H.

AU - Al Said, S.

AU - Asner, D. M.

AU - Aushev, T.

AU - Ayad, R.

AU - Aziz, T.

AU - Babu, V.

AU - Bahinipati, S.

AU - Behera, P.

AU - Bennett, J.

AU - Bessner, M.

AU - Bhardwaj, V.

AU - Bilka, T.

AU - Biswal, J.

AU - Bonvicini, G.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Campajola, M.

AU - Cao, L.

AU - Červenkov, D.

AU - Chang, M. C.

AU - Chang, P.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, H. E.

AU - Cho, K.

AU - Choi, S. K.

AU - Choi, Y.

AU - Choudhury, S.

AU - Cinabro, D.

AU - Cunliffe, S.

AU - Das, S.

AU - Dash, N.

AU - De Nardo, G.

AU - Di Capua, F.

AU - Dingfelder, J.

AU - DoleŽal, Z.

AU - Dong, T. V.

AU - Dubey, S.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Kwon, Y. J.

N1 - Funding Information: We acknowledge fruitful discussions with and helpful suggestions from S. Mahapatra (Utkal University), E. Passemar (Indiana University), and P. S. Bhupal Dev (Washington University). We thank the KEKB group for excellent operation of the accelerator; the KEK cryogenics group for efficient solenoid operations; and the KEK computer group, the NII, and PNNL/EMSL for valuable computing and SINET5 network support. We acknowledge support from MEXT, JSPS and Nagoya’s TLPRC (Japan); ARC (Australia); FWF (Austria); NSFC and CCEPP (China); MSMT (Czechia); CZF, DFG, EXC153, and VS (Germany); DAE and DST (India); INFN (Italy); MOE, MSIP, NRF, RSRI, FLRFAS project, GSDC of KISTI and KREONET/GLORIAD (Korea); MNiSW and NCN (Poland); MSHE, Agreement 14.W03.31.0026 (Russia); University of Tabuk (Saudi Arabia); ARRS (Slovenia); IKERBASQUE (Spain); SNSF (Switzerland); MOE and MOST (Taiwan); and DOE and NSF (USA). Publisher Copyright: © 2020 authors. Published by the American Physical Society.

PY - 2020/12/24

Y1 - 2020/12/24

N2 - We search for lepton-number- and baryon-number-violating decays τ-→p¯e+e-, pe-e-, p¯e+μ-, p¯e-μ+, p¯μ+μ-, and pμ-μ- using 921 fb-1 of data, equivalent to (841±12)×106 τ+τ- events, recorded with the Belle detector at the KEKB asymmetric-energy e+e- collider. In the absence of a signal, 90% confidence-level upper limits are set on the branching fractions of these decays in the range (1.8-4.0)×10-8. We set the world's first limits on the first four channels and improve the existing limits by an order of magnitude for the last two channels.

AB - We search for lepton-number- and baryon-number-violating decays τ-→p¯e+e-, pe-e-, p¯e+μ-, p¯e-μ+, p¯μ+μ-, and pμ-μ- using 921 fb-1 of data, equivalent to (841±12)×106 τ+τ- events, recorded with the Belle detector at the KEKB asymmetric-energy e+e- collider. In the absence of a signal, 90% confidence-level upper limits are set on the branching fractions of these decays in the range (1.8-4.0)×10-8. We set the world's first limits on the first four channels and improve the existing limits by an order of magnitude for the last two channels.

UR - http://www.scopus.com/inward/record.url?scp=85099363380&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85099363380&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.102.111101

DO - 10.1103/PhysRevD.102.111101

M3 - Article

AN - SCOPUS:85099363380

SN - 2470-0010

VL - 102

JO - Physical Review D

JF - Physical Review D

IS - 11

M1 - 111101

ER -

Search for lepton-number- And baryon-number-violating tau decays at Belle

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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