Search for the Dark Photon in B-0 -> A ' A ', A ' -> e(+)e(-), mu(+)mu(-), and pi(+)pi(-) decays at Belle
We present a search for the dark photon A in the B-0 -> A ' A ' decays, where A ' subsequently decays to e(+)e(-), mu (+)mu (-), and pi (+)pi (-). The search is performed by analyzing 772 x 10(6)BB<overbar></mml:mover> events collected by the Belle detector at the KEKB...
| Autores: | , |
|---|---|
| Formato: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Recursos: | Universidad del País Vasco |
| Repositorio: | Addi. Archivo Digital para la Docencia y la Investigación |
| OAI Identifier: | oai:addi.ehu.eus:10810/51858 |
| Acesso em linha: | http://hdl.handle.net/10810/51858 |
| Access Level: | acceso abierto |
| Palavra-chave: | dark photon Belle detector |
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| dc.title.none.fl_str_mv |
Search for the Dark Photon in B-0 -> A ' A ', A ' -> e(+)e(-), mu(+)mu(-), and pi(+)pi(-) decays at Belle |
| title |
Search for the Dark Photon in B-0 -> A ' A ', A ' -> e(+)e(-), mu(+)mu(-), and pi(+)pi(-) decays at Belle |
| spellingShingle |
Search for the Dark Photon in B-0 -> A ' A ', A ' -> e(+)e(-), mu(+)mu(-), and pi(+)pi(-) decays at Belle Belle Collaboration dark photon Belle detector |
| title_short |
Search for the Dark Photon in B-0 -> A ' A ', A ' -> e(+)e(-), mu(+)mu(-), and pi(+)pi(-) decays at Belle |
| title_full |
Search for the Dark Photon in B-0 -> A ' A ', A ' -> e(+)e(-), mu(+)mu(-), and pi(+)pi(-) decays at Belle |
| title_fullStr |
Search for the Dark Photon in B-0 -> A ' A ', A ' -> e(+)e(-), mu(+)mu(-), and pi(+)pi(-) decays at Belle |
| title_full_unstemmed |
Search for the Dark Photon in B-0 -> A ' A ', A ' -> e(+)e(-), mu(+)mu(-), and pi(+)pi(-) decays at Belle |
| title_sort |
Search for the Dark Photon in B-0 -> A ' A ', A ' -> e(+)e(-), mu(+)mu(-), and pi(+)pi(-) decays at Belle |
| dc.creator.none.fl_str_mv |
Belle Collaboration Schnell, Gunar |
| author |
Belle Collaboration |
| author_facet |
Belle Collaboration Schnell, Gunar |
| author_role |
author |
| author2 |
Schnell, Gunar |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
dark photon Belle detector |
| topic |
dark photon Belle detector |
| description |
We present a search for the dark photon A in the B-0 -> A ' A ' decays, where A ' subsequently decays to e(+)e(-), mu (+)mu (-), and pi (+)pi (-). The search is performed by analyzing 772 x 10(6)BB<overbar></mml:mover> events collected by the Belle detector at the KEKB e(+)e(-) energy-asymmetric collider at the Upsilon (4S) resonance. No signal is found in the dark photon mass range 0.01 GeV/c(2) <= m(A ') <= 2.62 GeV/c(2), and we set upper limits of the branching fraction of B-0 -> A ' A ' at the 90% confidence level. The products of branching fractions, B<mml:mfenced close=")" open="(">B0 -> A ' A '</mml:mfenced>xB<mml:mfenced close=")" open="(">A ' -> e+e-</mml:mfenced>2 and B<mml:mfenced close=")" open="(">B0 -> A ' A '</mml:mfenced>xB<mml:mfenced close=")" open="(">A ' -> mu+mu-</mml:mfenced>2, have limits of the order of 10(-8) depending on the A ' mass. Furthermore, considering A ' decay rate to each pair of charged particles, the upper limits of B<mml:mfenced close=")" open="(">B0 -> A ' A '</mml:mfenced> are of the order of 10(-8)-10(-5). From the upper limits of B<mml:mfenced close=")" open="(">B0 -> A ' A '</mml:mfenced>, we obtain the Higgs portal coupling for each assumed dark photon and dark Higgs mass. The Higgs portal couplings are of the order of 10(-2)-10(-1) at mh ' similar or equal to mB0 +/- 40 MeV/c(2) and 10(-1)-1 at mh ' <mml:mo>similar or equal to mB0 +/- 3 GeV/c(2).<fig id="Figa" position="anchor"><graphic position="anchor" specific-use="HTML" mime-subtype="JPEG" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="MediaObjects/13130_2021_15453_Figa_HTML.jpg" id="MO1"></graphic |
| publishDate |
2021 |
| dc.date.none.fl_str_mv |
2021 2021 2021 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10810/51858 |
| url |
http://hdl.handle.net/10810/51858 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
https://link.springer.com/article/10.1007/JHEP04(2021)191 |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/3.0/es/ This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0) Atribución 3.0 España |
| eu_rights_str_mv |
openAccess |
| rights_invalid_str_mv |
http://creativecommons.org/licenses/by/3.0/es/ This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0) Atribución 3.0 España |
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application/pdf |
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Springer |
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Springer |
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reponame:Addi. Archivo Digital para la Docencia y la Investigación instname:Universidad del País Vasco |
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Universidad del País Vasco |
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Addi. Archivo Digital para la Docencia y la Investigación |
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Addi. Archivo Digital para la Docencia y la Investigación |
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1869407014376964096 |
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Search for the Dark Photon in B-0 -> A ' A ', A ' -> e(+)e(-), mu(+)mu(-), and pi(+)pi(-) decays at BelleBelle CollaborationSchnell, Gunardark photonBelle detectorWe present a search for the dark photon A in the B-0 -> A ' A ' decays, where A ' subsequently decays to e(+)e(-), mu (+)mu (-), and pi (+)pi (-). The search is performed by analyzing 772 x 10(6)BB<overbar></mml:mover> events collected by the Belle detector at the KEKB e(+)e(-) energy-asymmetric collider at the Upsilon (4S) resonance. No signal is found in the dark photon mass range 0.01 GeV/c(2) <= m(A ') <= 2.62 GeV/c(2), and we set upper limits of the branching fraction of B-0 -> A ' A ' at the 90% confidence level. The products of branching fractions, B<mml:mfenced close=")" open="(">B0 -> A ' A '</mml:mfenced>xB<mml:mfenced close=")" open="(">A ' -> e+e-</mml:mfenced>2 and B<mml:mfenced close=")" open="(">B0 -> A ' A '</mml:mfenced>xB<mml:mfenced close=")" open="(">A ' -> mu+mu-</mml:mfenced>2, have limits of the order of 10(-8) depending on the A ' mass. Furthermore, considering A ' decay rate to each pair of charged particles, the upper limits of B<mml:mfenced close=")" open="(">B0 -> A ' A '</mml:mfenced> are of the order of 10(-8)-10(-5). From the upper limits of B<mml:mfenced close=")" open="(">B0 -> A ' A '</mml:mfenced>, we obtain the Higgs portal coupling for each assumed dark photon and dark Higgs mass. The Higgs portal couplings are of the order of 10(-2)-10(-1) at mh ' similar or equal to mB0 +/- 40 MeV/c(2) and 10(-1)-1 at mh ' <mml:mo>similar or equal to mB0 +/- 3 GeV/c(2).<fig id="Figa" position="anchor"><graphic position="anchor" specific-use="HTML" mime-subtype="JPEG" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="MediaObjects/13130_2021_15453_Figa_HTML.jpg" id="MO1"></graphicWe thank B. Batell and M. Pospelov for the discussion of the B0 ! A0 A0 branching fraction which helped to finalize this paper. We thank the KEKB group for the excellent operation of the accelerator; the KEK cryogenics group for the efficient operation of the solenoid; and the KEK computer group, and the Pacific Northwest National Laboratory (PNNL) Environmental Molecular Sciences Laboratory (EMSL) computing group for strong computing support; and the National Institute of Informatics, and Science Information NETwork 5 (SINET5) for valuable network support. We acknowledge support from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan, the Japan Society for the Promotion of Science (JSPS), and the Tau-Lepton Physics Research Center of Nagoya University; the Australian Research Council including grants DP180102629, DP170102389, DP170102204, DP150103061, FT130100303; Austrian Federal Ministry of Education, Science and Research (FWF) and FWF Austrian Science Fund No. P 31361-N36; the National Natural Science Foundation of China under Contracts No. 11435013, No. 11475187, No. 11521505, No. 11575017, No. 11675166, No. 11705209; Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS), Grant No. QYZDJ-SSW-SLH011; the CAS Center for Excellence in Particle Physics (CCEPP); the Shanghai Pujiang Program under Grant No. 18PJ1401000; the Ministry of Education, Youth and Sports of the Czech Republic under Contract No. LTT17020; the Carl Zeiss Foundation, the Deutsche Forschungsgemeinschaft, the Excellence Cluster Universe, and the VolkswagenStiftung; the Department of Atomic Energy (Project Identification No. RTI 4002) and the Department of Science and Technology of India; the Istituto Nazionale di Fisica Nucleare of Italy; National Research Foundation (NRF) of Korea Grant Nos. 2016R1D1A1B01010135, 2016R1D1A1B02012900, 2018R1A2B3003643, 2018R1A6A1A06024970, 2018R1D1A1B07047294, 2018R1A4A1025334, 2019K1A3A7A09033840, 2019K1A3A7A09034999, 2019R1I1A3A01058933; Radiation Science Research Institute, Foreign Largesize Research Facility Application Supporting project, the Global Science Experimental Data Hub Center of the Korea Institute of Science and Technology Information and KREONET/GLORIAD; the Polish Ministry of Science and Higher Education and the National Science Center; the Ministry of Science and Higher Education of the Russian Federation, Agreement 14.W03.31.0026 and the HSE University Basic Research Program, Moscow; University of Tabuk research grants S-1440-0321, S-0256-1438, and S-0280-1439 (Saudi Arabia); the Slovenian Research Agency Grant Nos. J1-9124 and P1-0135; Ikerbasque, Basque Foundation for Science, Spain; the Swiss National Science Foundation; the Ministry of Education and the Ministry of Science and Technology of Taiwan; and the United States Department of Energy and the National Science Foundation.Springer202120212021info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/51858reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoIngléshttps://link.springer.com/article/10.1007/JHEP04(2021)191info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/3.0/es/This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0)Atribución 3.0 Españaoai:addi.ehu.eus:10810/518582026-06-18T09:23:17Z |
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15,300724 |