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  1. Artikel ; Online: Search for Sub-eV Sterile Neutrinos at RENO.

    Choi, J H / Jang, H I / Jang, J S / Jeon, S H / Joo, K K / Ju, K / Jung, D E / Kim, J G / Kim, J H / Kim, J Y / Kim, S B / Kim, S Y / Kim, W / Kwon, E / Lee, D H / Lee, H G / Lim, I T / Moon, D H / Pac, M Y /
    Seo, H / Seo, J W / Shin, C D / Yang, B S / Yoo, J / Yoon, S G / Yeo, I S / Yu, I

    Physical review letters

    2020  Band 125, Heft 19, Seite(n) 191801

    Abstract: We report a search result for a light sterile neutrino oscillation with roughly 2200 live days of data in the RENO experiment. The search is performed by electron antineutrino (ν[over ¯]_{e}) disappearance taking place between six 2.8 GW_{th} reactors ... ...

    Abstract We report a search result for a light sterile neutrino oscillation with roughly 2200 live days of data in the RENO experiment. The search is performed by electron antineutrino (ν[over ¯]_{e}) disappearance taking place between six 2.8 GW_{th} reactors and two identical detectors located at 294 m (near) and 1383 m (far) from the center of the reactor array. A spectral comparison between near and far detectors can explore reactor ν[over ¯]_{e} oscillations to a light sterile neutrino. An observed spectral difference is found to be consistent with that of the three-flavor oscillation model. This yields limits on sin^{2}2θ_{14} in the 10^{-4}≲|Δm_{41}^{2}|≲0.5  eV^{2} region, free from reactor ν[over ¯]_{e} flux and spectrum uncertainties. The RENO result provides the most stringent limits on sterile neutrino mixing at |Δm_{41}^{2}|≲0.002  eV^{2} using the ν[over ¯]_{e} disappearance channel.
    Sprache Englisch
    Erscheinungsdatum 2020-11-20
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.125.191801
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  2. Artikel ; Online: Sterile Neutrino Search at the NEOS Experiment.

    Ko, Y J / Kim, B R / Kim, J Y / Han, B Y / Jang, C H / Jeon, E J / Joo, K K / Kim, H J / Kim, H S / Kim, Y D / Lee, Jaison / Lee, J Y / Lee, M H / Oh, Y M / Park, H K / Park, H S / Park, K S / Seo, K M / Siyeon, Kim /
    Sun, G M

    Physical review letters

    2017  Band 118, Heft 12, Seite(n) 121802

    Abstract: An experiment to search for light sterile neutrinos is conducted at a reactor with a thermal power of 2.8 GW located at the Hanbit nuclear power complex. The search is done with a detector consisting of a ton of Gd-loaded liquid scintillator in a tendon ... ...

    Abstract An experiment to search for light sterile neutrinos is conducted at a reactor with a thermal power of 2.8 GW located at the Hanbit nuclear power complex. The search is done with a detector consisting of a ton of Gd-loaded liquid scintillator in a tendon gallery approximately 24 m from the reactor core. The measured antineutrino event rate is 1976 per day with a signal to background ratio of about 22. The shape of the antineutrino energy spectrum obtained from the eight-month data-taking period is compared with a hypothesis of oscillations due to active-sterile antineutrino mixing. No strong evidence of 3+1 neutrino oscillation is found. An excess around the 5 MeV prompt energy range is observed as seen in existing longer-baseline experiments. The mixing parameter sin^{2}2θ_{14} is limited up to less than 0.1 for Δm_{41}^{2} ranging from 0.2 to 2.3 eV^{2} with a 90% confidence level.
    Sprache Englisch
    Erscheinungsdatum 2017-03-24
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.118.121802
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  3. Artikel ; Online: Fuel-Composition Dependent Reactor Antineutrino Yield at RENO.

    Bak, G / Choi, J H / Jang, H I / Jang, J S / Jeon, S H / Joo, K K / Ju, K / Jung, D E / Kim, J G / Kim, J H / Kim, J Y / Kim, S B / Kim, S Y / Kim, W / Kwon, E / Lee, D H / Lee, H G / Lee, Y C / Lim, I T /
    Moon, D H / Pac, M Y / Park, Y S / Rott, C / Seo, H / Seo, J W / Seo, S H / Shin, C D / Yang, J Y / Yoo, J / Yu, I

    Physical review letters

    2019  Band 122, Heft 23, Seite(n) 232501

    Abstract: We report a fuel-dependent reactor electron antineutrino (ν[over ¯]_{e}) yield using six 2.8 GW_{th} reactors in the Hanbit nuclear power plant complex, Yonggwang, Korea. The analysis uses 850 666 ν[over ¯]_{e} candidate events with a background fraction ...

    Abstract We report a fuel-dependent reactor electron antineutrino (ν[over ¯]_{e}) yield using six 2.8 GW_{th} reactors in the Hanbit nuclear power plant complex, Yonggwang, Korea. The analysis uses 850 666 ν[over ¯]_{e} candidate events with a background fraction of 2.0% acquired through inverse beta decay (IBD) interactions in the near detector for 1807.9 live days from August 2011 to February 2018. Based on multiple fuel cycles, we observe a fuel ^{235}U dependent variation of measured IBD yields with a slope of (1.51±0.23)×10^{-43}  cm^{2}/fission and measure a total average IBD yield of (5.84±0.13)×10^{-43}  cm^{2}/fission. The hypothesis of no fuel-dependent IBD yield is ruled out at 6.6σ. The observed IBD yield variation over ^{235}U isotope fraction does not show significant deviation from the Huber-Mueller (HM) prediction at 1.3 σ. The measured fuel-dependent variation determines IBD yields of (6.15±0.19)×10^{-43} and (4.18±0.26)×10^{-43}  cm^{2}/fission for two dominant fuel isotopes ^{235}U and ^{239}Pu, respectively. The measured IBD yield per ^{235}U fission shows the largest deficit relative to the HM prediction. Reevaluation of the ^{235}U IBD yield per fission may mostly solve the reactor antineutrino anomaly (RAA) while ^{239}Pu is not completely ruled out as a possible contributor to the anomaly. We also report a 2.9 σ correlation between the fractional change of the 5 MeV excess and the reactor fuel isotope fraction of ^{235}U.
    Sprache Englisch
    Erscheinungsdatum 2019-07-12
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.122.232501
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  4. Buch ; Online: Production and optical properties of liquid scintillator for the JSNS$^{2}$ experiment

    Park, J. S. / Kim, S. Y. / Rott, C. / Lee, D. H. / Jung, D. / Suekane, F. / Furuta, H. / Jang, H. I. / Jeon, H. K. / Yu, I. / Choi, J. H. / Jang, J. S. / Joo, K. K. / Ju, K. W. / Pac, M. / Gwak, P. J. / Kim, S. B. / Hasegawa, S. / Jeon, S. H. /
    Maruyama, T. / Ujiie, R. / Hino, Y. / Park, Y. S.

    2019  

    Abstract: The JSNS$^{2}$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment will search for neutrino oscillations over a 24 m short baseline at J-PARC. The JSNS$^{2}$ inner detector will be filled with 17 tons of gadolinium-loaded ... ...

    Abstract The JSNS$^{2}$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment will search for neutrino oscillations over a 24 m short baseline at J-PARC. The JSNS$^{2}$ inner detector will be filled with 17 tons of gadolinium-loaded liquid scintillator (LS) with an additional 31 tons of unloaded LS in the intermediate $\gamma$-catcher and outer veto volumes. JSNS$^{2}$ has chosen Linear Alkyl Benzene (LAB) as an organic solvent because of its chemical properties. The unloaded LS was produced at a refurbished facility, originally used for scintillator production by the RENO experiment. JSNS$^{2}$ plans to use ISO tanks for the storage and transportation of the LS. In this paper, we describe the LS production, and present measurements of its optical properties and long term stability. Our measurements show that storing the LS in ISO tanks does not result in degradation of its optical properties.

    Comment: 7 pages, 4 figures
    Schlagwörter Physics - Instrumentation and Detectors ; High Energy Physics - Experiment
    Thema/Rubrik (Code) 660
    Erscheinungsdatum 2019-06-01
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  5. Buch ; Online: Measurement of Reactor Antineutrino Flux and Spectrum at RENO

    Atif, Z. / Choi, J. H. / Jang, H. I. / Jang, J. S. / Jeon, S. H. / Joo, K. K. / Ju, K. / Jung, D. E. / Kim, J. G. / Kim, J. H. / Kim, J. Y. / Kim, S. B. / Kim, S. Y. / Kim, W. / Kwon, E. / Lee, D. H. / Lee, H. G. / Lim, I. T. / Moon, D. H. /
    Pac, M. Y. / Seo, H. / Seo, J. W. / Shin, C. D. / Yang, B. S. / Yoo, J. / Yoon, S. G. / Yeo, I. S. / Yu, I.

    2020  

    Abstract: The RENO experiment reports measured flux and energy spectrum of reactor electron antineutrinos\,($\overline{\nu}_e$) from the six reactors at Hanbit Nuclear Power Plant. The measurements use 966\,094\,(116\,111)\,$\overline{\nu}_e$ candidate events with ...

    Abstract The RENO experiment reports measured flux and energy spectrum of reactor electron antineutrinos\,($\overline{\nu}_e$) from the six reactors at Hanbit Nuclear Power Plant. The measurements use 966\,094\,(116\,111)\,$\overline{\nu}_e$ candidate events with a background fraction of 2.39\%\,(5.13\%), acquired in the near\,(far) detector, from August 2011 to March 2020. The inverse beta decay (IBD) yield is measured as (5.852$\,\pm\,$0.124$) \times 10^{-43}$\,cm$^2$/fission, corresponding to 0.941\,$\pm$ 0.019 of the prediction by the Huber and Mueller (HM) model. A reactor $\overline{\nu}_e$ spectrum is obtained by unfolding a measured IBD prompt spectrum. The obtained neutrino spectrum shows a clear excess around 6\,MeV relative to the HM prediction. The obtained reactor $\overline{\nu}_e$ spectrum will be useful for understanding unknown neutrino properties and reactor models. The observed discrepancies suggest the next round of precision measurements and modification of the current reactor $\overline{\nu}_e$ models.

    Comment: 6 pages, 4 figures, Revision note: (1) Data release of prompt and antineutrino spectra including associated error matrices, (2)systematic errors of unfolding methods are reevaluated, (3)various reactor neutrino models other than HM are tested, (4) double gaussian interpretation of the 5MeV bump is removed
    Schlagwörter High Energy Physics - Experiment
    Thema/Rubrik (Code) 660
    Erscheinungsdatum 2020-10-28
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  6. Buch ; Online: Search for sterile neutrino oscillation using RENO and NEOS data

    Atif, Z. / Choi, J. H. / Jang, H. I. / Jang, J. S. / Jeon, S. H. / Joo, K. K. / Ju, K. / Jung, D. E. / Kim, J. G. / Kim, J. H. / Kim, J. Y. / Kim, S. B. / Kim, S. Y. / Kim, W. / Kwon, E. / Lee, D. H. / Lee, H. G. / Lim, I. T. / Moon, D. H. /
    Pac, M. Y. / Seo, H. / Seo, J. W. / Shin, C. D. / Yang, B. S. / Yoo, J. / Yoon, S. G. / Yeo, I. S. / Yu, I.

    2020  

    Abstract: We present a model independent search for sterile neutrino oscillation using 2\,508.9\,days of RENO near detector data and a NEOS published result. The reactor related systematic uncertainties are significantly suppressed as both detectors are located at ...

    Abstract We present a model independent search for sterile neutrino oscillation using 2\,508.9\,days of RENO near detector data and a NEOS published result. The reactor related systematic uncertainties are significantly suppressed as both detectors are located at the same reactor complex of Hanbit Nuclear Power Plant. The search is performed by electron antineutrino ($\overline{\nu}_e$) disappearance between six reactors and two detectors with baselines of 294\,m (RENO) and 24\,m (NEOS). A spectral comparison of the NEOS prompt-energy spectrum with a prediction from the RENO measurement can explore reactor $\overline{\nu}_e$ oscillations to sterile neutrino. Based on the spectral comparison, we obtain a 90\% C.L. excluded region of $10^{-3}<|\Delta m_{41}^2|<7$\,eV$^2$. We also obtain a 68\% C.L. allowed region with the best fit of $|\Delta m_{41}^2|=2.37\,\pm\,0.03\,$\,eV$^2$ and $\sin^2 2\theta_{14}$=0.09$\,\pm\,$0.03. Comparisons of obtained reactor antineutrino spectra at reactor sources are made among RENO, NEOS and Daya Bay to find a possible spectral variation. The unfolded reactor antineutrino spectra will be useful for studying reactor neutrino physics and particle physics beyond the Standard Model.

    Comment: 6 pages, 6 figures
    Schlagwörter High Energy Physics - Experiment ; Nuclear Experiment
    Thema/Rubrik (Code) 660
    Erscheinungsdatum 2020-11-02
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  7. Artikel ; Online: Measurement of Reactor Antineutrino Oscillation Amplitude and Frequency at RENO.

    Bak, G / Choi, J H / Jang, H I / Jang, J S / Jeon, S H / Joo, K K / Ju, K / Jung, D E / Kim, J G / Kim, J H / Kim, J Y / Kim, S B / Kim, S Y / Kim, W / Kwon, E / Lee, D H / Lee, H G / Lee, Y C / Lim, I T /
    Moon, D H / Pac, M Y / Park, Y S / Rott, C / Seo, H / Seo, J W / Seo, S H / Shin, C D / Yang, J Y / Yoo, J / Yu, I

    Physical review letters

    2018  Band 121, Heft 20, Seite(n) 201801

    Abstract: The RENO experiment reports more precisely measured values of θ_{13} and |Δm_{ee}^{2}| using ∼2200 live days of data. The amplitude and frequency of reactor electron antineutrino (ν[over ¯]_{e}) oscillation are measured by comparing the prompt signal ... ...

    Abstract The RENO experiment reports more precisely measured values of θ_{13} and |Δm_{ee}^{2}| using ∼2200 live days of data. The amplitude and frequency of reactor electron antineutrino (ν[over ¯]_{e}) oscillation are measured by comparing the prompt signal spectra obtained from two identical near and far detectors. In the period between August 2011 and February 2018, the far (near) detector observed 103 212 (850 666) ν[over ¯]_{e} candidate events with a background fraction of 4.8% (2.0%). A clear energy and baseline dependent disappearance of reactor ν[over ¯]_{e} is observed in the deficit of the measured number of ν[over ¯]_{e}. Based on the measured far-to-near ratio of prompt spectra, we obtain sin^{2}2θ_{13}=0.0896±0.0048(stat)±0.0047(syst) and |Δm_{ee}^{2}|=[2.68±0.12(stat)±0.07(syst)]×10^{-3}  eV^{2}.
    Sprache Englisch
    Erscheinungsdatum 2018-11-28
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.121.201801
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  8. Artikel ; Online: Observation of Energy and Baseline Dependent Reactor Antineutrino Disappearance in the RENO Experiment.

    Choi, J H / Choi, W Q / Choi, Y / Jang, H I / Jang, J S / Jeon, E J / Joo, K K / Kim, B R / Kim, H S / Kim, J Y / Kim, S B / Kim, S Y / Kim, W / Kim, Y D / Ko, Y / Lee, D H / Lim, I T / Pac, M Y / Park, I G /
    Park, J S / Park, R G / Seo, H / Seo, S H / Seon, Y G / Shin, C D / Siyeon, K / Yang, J H / Yeo, I S / Yu, I

    Physical review letters

    2016  Band 116, Heft 21, Seite(n) 211801

    Abstract: The RENO experiment has analyzed about 500 live days of data to observe an energy dependent disappearance of reactor ν[over ¯]_{e} by comparing their prompt signal spectra measured in two identical near and far detectors. In the period between August of ... ...

    Abstract The RENO experiment has analyzed about 500 live days of data to observe an energy dependent disappearance of reactor ν[over ¯]_{e} by comparing their prompt signal spectra measured in two identical near and far detectors. In the period between August of 2011 and January of 2013, the far (near) detector observed 31 541 (290 775) electron antineutrino candidate events with a background fraction of 4.9% (2.8%). The measured prompt spectra show an excess of reactor ν[over ¯]_{e} around 5 MeV relative to the prediction from a most commonly used model. A clear energy and baseline dependent disappearance of reactor ν[over ¯]_{e} is observed in the deficit of the observed number of ν[over ¯]_{e}. Based on the measured far-to-near ratio of prompt spectra, we obtain sin^{2}2θ_{13}=0.082±0.009(stat)±0.006(syst) and |Δm_{ee}^{2}|=[2.62_{-0.23}^{+0.21}(stat)_{-0.13}^{+0.12}(syst)]×10^{-3}  eV^{2}.
    Sprache Englisch
    Erscheinungsdatum 2016-05-27
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.116.211801
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  9. Artikel ; Online: First Simultaneous Determination of Inclusive and Exclusive |V_{ub}|.

    Cao, L / Bernlochner, F / Tackmann, K / Adachi, I / Aihara, H / Al Said, S / Asner, D M / Atmacan, H / Aushev, T / Ayad, R / Babu, V / Bahinipati, S / Banerjee, Sw / Behera, P / Belous, K / Bennett, J / Bessner, M / Bhuyan, B / Bilka, T /
    Biswas, D / Bobrov, A / Bodrov, D / Borah, J / Bozek, A / Bračko, M / Branchini, P / Browder, T E / Budano, A / Campajola, M / Červenkov, D / Chang, M-C / Cheon, B G / Chilikin, K / Cho, H E / Cho, K / Cho, S-J / Choi, S-K / Choi, Y / Choudhury, S / Cinabro, D / Cunliffe, S / Das, S / de Marino, G / De Nardo, G / De Pietro, G / Dhamija, R / Di Capua, F / Dingfelder, J / Doležal, Z / Dong, T V / Ferber, T / Ferlewicz, D / Frey, A / Fulsom, B G / Gaur, V / Garmash, A / Giri, A / Goldenzweig, P / Graziani, E / Gu, T / Guan, Y / Gudkova, K / Hadjivasiliou, C / Halder, S / Hara, T / Hartbrich, O / Hayasaka, K / Hayashii, H / Hedges, M T / Herrmann, D / Hou, W-S / Hsu, C-L / Iijima, T / Inami, K / Ipsita, N / Ishikawa, A / Itoh, R / Iwasaki, M / Jacobs, W W / Jang, E-J / Jia, S / Jin, Y / Joo, K K / Kalita, D / Kang, K H / Kiesling, C / Kim, C H / Kim, D Y / Kim, K-H / Kim, Y-K / Kinoshita, K / Kodyš, P / Konno, T / Korobov, A / Korpar, S / Kovalenko, E / Križan, P / Krokovny, P / Kuhr, T / Kumar, R / Kumara, K / Kuzmin, A / Kwon, Y-J / Lange, J S / Laurenza, M / Lee, S C / Lewis, P / Li, J / Li, L K / Li, Y / Libby, J / Lin, Y-R / Liventsev, D / Luo, T / Ma, Y / Martini, A / Masuda, M / Matsuda, T / Matvienko, D / Maurya, S K / Meier, F / Merola, M / Metzner, F / Miyabayashi, K / Mizuk, R / Mohanty, G B / Mrvar, M / Mussa, R / Nakamura, I / Nakao, M / Natkaniec, Z / Natochii, A / Nayak, L / Nayak, M / Nisar, N K / Nishida, S / Ogawa, K / Ogawa, S / Ono, H / Oskin, P / Pakhlov, P / Pakhlova, G / Pang, T / Pardi, S / Park, H / Park, J / Park, S-H / Passeri, A / Patra, S / Paul, S / Pedlar, T K / Pestotnik, R / Piilonen, L E / Podobnik, T / Prencipe, E / Prim, M T / Rout, N / Rozanska, M / Russo, G / Sandilya, S / Sangal, A / Santelj, L / Savinov, V / Schnell, G / Schwanda, C / Seino, Y / Senyo, K / Sevior, M E / Shan, W / Shapkin, M / Sharma, C / Shen, C P / Shiu, J-G / Shwartz, B / Sokolov, A / Solovieva, E / Starič, M / Stottler, Z S / Sumihama, M / Sutcliffe, W / Takizawa, M / Tamponi, U / Tanida, K / Tenchini, F / Tiwary, R / Trabelsi, K / Uchida, M / Uglov, T / Unno, Y / Uno, K / Uno, S / Ushiroda, Y / Usov, Y / Vahsen, S E / Varner, G / Varvell, K E / Vossen, A / Wang, D / Wang, E / Wang, M-Z / Watanuki, S / Werbycka, O / Won, E / Xu, X / Yabsley, B D / Yan, W / Yang, S B / Yin, J H / Yook, Y / Yusa, Y / Zhang, Z P / Zhilich, V / Zhukova, V

    Physical review letters

    2023  Band 131, Heft 21, Seite(n) 211801

    Abstract: The first simultaneous determination of the absolute value of the Cabibbo-Kobayashi-Maskawa matrix element V_{ub} using inclusive and exclusive decays is performed with the full Belle data set at the ϒ(4S) resonance, corresponding to an integrated ... ...

    Abstract The first simultaneous determination of the absolute value of the Cabibbo-Kobayashi-Maskawa matrix element V_{ub} using inclusive and exclusive decays is performed with the full Belle data set at the ϒ(4S) resonance, corresponding to an integrated luminosity of 711  fb^{-1}. We analyze collision events in which one B meson is fully reconstructed in hadronic modes. This allows for the reconstruction of the hadronic X_{u} system of the semileptonic b→uℓν[over ¯]_{ℓ} decay. We separate exclusive B→πℓν[over ¯]_{ℓ} decays from other inclusive B→X_{u}ℓν[over ¯]_{ℓ} and backgrounds with a two-dimensional fit that utilizes the number of charged pions in the X_{u} system and the four-momentum transfer q^{2} between the B and X_{u} systems. Combining our measurement with information from lattice QCD and QCD calculations of the inclusive partial rate as well as external experimental information on the shape of the B→πℓν[over ¯]_{ℓ} form factor, we determine |V_{ub}^{excl}|=(3.78±0.23±0.16±0.14)×10^{-3} and |V_{ub}^{incl}|=(3.88±0.20±0.31±0.09)×10^{-3}, respectively, with the uncertainties being the statistical error, systematic errors, and theory errors. The ratio of |V_{ub}^{excl}|/|V_{ub}^{incl}|=0.97±0.12 is compatible with unity.
    Sprache Englisch
    Erscheinungsdatum 2023-09-29
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.211801
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  10. Artikel ; Online: First Measurement of the Michel Parameter ξ^{'} in the τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} Decay at Belle.

    Bodrov, D / Pakhlov, P / Adachi, I / Aihara, H / Said, S Al / Asner, D M / Atmacan, H / Aushev, T / Ayad, R / Babu, V / Banerjee, Sw / Behera, P / Belous, K / Bennett, J / Bessner, M / Bhuyan, B / Bilka, T / Biswas, D / Bobrov, A /
    Bondar, A / Borah, J / Bozek, A / Bračko, M / Branchini, P / Browder, T E / Budano, A / Campajola, M / Červenkov, D / Chang, M-C / Cheon, B G / Chilikin, K / Cho, H E / Cho, K / Cho, S-J / Choi, S-K / Choi, Y / Choudhury, S / Cinabro, D / Das, S / De Nardo, G / De Pietro, G / Dhamija, R / Di Capua, F / Dingfelder, J / Doležal, Z / Dong, T V / Epifanov, D / Ferber, T / Ferlewicz, D / Fulsom, B G / Gaur, V / Garmash, A / Giri, A / Goldenzweig, P / Graziani, E / Greenwald, D / Gu, T / Guan, Y / Gudkova, K / Hadjivasiliou, C / Halder, S / Hayasaka, K / Hayashii, H / Hedges, M T / Herrmann, D / Hou, W-S / Hsu, C-L / Iijima, T / Inami, K / Ipsita, N / Ishikawa, A / Itoh, R / Iwasaki, M / Jacobs, W W / Jang, E-J / Ji, Q P / Jia, S / Jin, Y / Joo, K K / Kalita, D / Kaliyar, A B / Kawasaki, T / Kiesling, C / Kim, C H / Kim, D Y / Kim, K-H / Kim, Y-K / Kindo, H / Kinoshita, K / Kodyš, P / Korpar, S / Križan, P / Krokovny, P / Kuhr, T / Kumar, M / Kumar, R / Kumara, K / Kwon, Y-J / Lange, J S / Lee, S C / Li, J / Li, L K / Libby, J / Lieret, K / Lin, Y-R / Liventsev, D / Luo, T / Ma, Y / Masuda, M / Matsuda, T / Maurya, S K / Meier, F / Merola, M / Metzner, F / Miyabayashi, K / Mizuk, R / Mohanty, G B / Mussa, R / Nakao, M / Narwal, D / Natkaniec, Z / Natochii, A / Nayak, L / Nayak, M / Nisar, N K / Nishida, S / Ogawa, S / Oskin, P / Pakhlova, G / Pardi, S / Park, H / Park, J / Park, S-H / Passeri, A / Patra, S / Paul, S / Pestotnik, R / Piilonen, L E / Podobnik, T / Prencipe, E / Prim, M T / Rabusov, A / Rout, N / Russo, G / Sandilya, S / Sangal, A / Santelj, L / Savinov, V / Schnell, G / Schwanda, C / Seino, Y / Senyo, K / Shan, W / Shapkin, M / Sharma, C / Shiu, J-G / Singh, J B / Sokolov, A / Solovieva, E / Starič, M / Stottler, Z S / Sumihama, M / Takizawa, M / Tamponi, U / Tanida, K / Tenchini, F / Tiwary, R / Trabelsi, K / Uchida, M / Uglov, T / Unno, Y / Uno, K / Uno, S / Vahsen, S E / Varner, G / Vinokurova, A / Vossen, A / Wang, D / Wang, E / Wang, M-Z / Watanuki, S / Werbycka, O / Xu, X / Yabsley, B D / Yan, W / Yang, S B / Yelton, J / Yin, J H / Yuan, C Z / Yusa, Y / Zhang, Z P / Zhilich, V / Zhukova, V

    Physical review letters

    2023  Band 131, Heft 2, Seite(n) 21801

    Abstract: We report the first measurement of the Michel parameter ξ^{'} in the τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} decay with a new method proposed just recently. The measurement is based on the reconstruction of the τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} events with subsequent ... ...

    Abstract We report the first measurement of the Michel parameter ξ^{'} in the τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} decay with a new method proposed just recently. The measurement is based on the reconstruction of the τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} events with subsequent muon decay in flight in the Belle central drift chamber. The analyzed data sample of 988  fb^{-1} collected by the Belle detector corresponds to approximately 912×10^{6} τ^{+}τ^{-} pairs. We measure ξ^{'}=0.22±0.94(stat)±0.42(syst), which is in agreement with the standard model prediction of ξ^{'}=1. Statistical uncertainty dominates in this study, being a limiting factor, while systematic uncertainty is well under control. Our analysis proved the practicability of this promising method and its prospects for further precise measurement in future experiments.
    Sprache Englisch
    Erscheinungsdatum 2023-07-28
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.021801
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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