Measurement of the quasielastic axial vector mass in neutrino interactions on oxygen
R. GranDepartment of Physics, University of Washington, Seattle, Washington 98195-1560, USAE. J. JeonDepartment of Physics, Seoul National University, Seoul 151-747, KoreaE. AliuInstitut de Fisica d’Altes Energies, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Barcelona), SpainS. AndringaInstitut de Fisica d’Altes Energies, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Barcelona), SpainS. AokiKobe University, Kobe, Hyogo 657-8501, JapanJ. ArgyriadesDAPNIA, CEA Saclay, 91191 Gif-sur-Yvette Cedex, FranceK. AsakuraKobe University, Kobe, Hyogo 657-8501, JapanR. AshieKamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, JapanF. BerghausDepartment of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1H. BernsDepartment of Physics, University of Washington, Seattle, Washington 98195-1560, USAH. BhangDepartment of Physics, Seoul National University, Seoul 151-747, KoreaA. BlondelDPNC, Section de Physique, University of Geneva, CH1211, Geneva 4, SwitzerlandS. BorghiDPNC, Section de Physique, University of Geneva, CH1211, Geneva 4, SwitzerlandJ. BouchezDAPNIA, CEA Saclay, 91191 Gif-sur-Yvette Cedex, FranceJ. Burguet–CastellInstituto de Física Corpuscular, E-46071 Valencia, SpainD. CasperDepartment of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, USAJ. CatalaInstituto de Física Corpuscular, E-46071 Valencia, SpainC. CavataDAPNIA, CEA Saclay, 91191 Gif-sur-Yvette Cedex, FranceA. CerveraDPNC, Section de Physique, University of Geneva, CH1211, Geneva 4, SwitzerlandS. M. ChenTRIUMF, Vancouver, British Columbia, Canada V6T 2A3K. O. ChoDepartment of Physics, Chonnam National University, Kwangju 500-757, KoreaJ. H. ChoiDepartment of Physics, Chonnam National University, Kwangju 500-757, KoreaU. DoreUniversity of Rome La Sapienza and INFN, I-000185 Rome, ItalyX. EspinalInstitut de Fisica d’Altes Energies, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Barcelona), SpainM. FechnerDAPNIA, CEA Saclay, 91191 Gif-sur-Yvette Cedex, FranceE. FernándezInstitut de Fisica d’Altes Energies, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Barcelona), SpainY. FukudaDepartment of Physics, Miyagi University of Education, Sendai 980-0845, JapanJ.J. Gómez-CadenasInstituto de Física Corpuscular, E-46071 Valencia, SpainT. HaraKobe University, Kobe, Hyogo 657-8501, JapanM. HasegawaDepartment of Physics, Kyoto University, Kyoto 606-8502, JapanT. HasegawaResearch Center for Neutrino Science, Tohoku University, Sendai, Miyagi 980-8578, JapanKenji HayashiDepartment of Physics, Kyoto University, Kyoto 606-8502, JapanY. HayatoKamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, JapanR. L. HelmerTRIUMF, Vancouver, British Columbia, Canada V6T 2A3K. HiraideDepartment of Physics, Kyoto University, Kyoto 606-8502, JapanJ. HosakaKamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, JapanA. K. IchikawaHigh Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, JapanM. IinumaGraduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8530, JapanAkihiro IkedaDepartment of Physics, Okayama University, Okayama, Okayama 700-8530, JapanT. InagakiDepartment of Physics, Kyoto University, Kyoto 606-8502, JapanToru IshidaHigh Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, JapanK. IshiharaKamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, JapanT. IshiiHigh Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, JapanM. IshitsukaResearch Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, JapanY. ItowKamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, JapanT. IwashitaHigh Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, JapanH. I. JangDepartment of Physics, Chonnam National University, Kwangju 500-757, KoreaIn Seok JeongDepartment of Physics, Chonnam National University, Kwangju 500-757, KoreaK. K. JooDepartment of Physics, Seoul National University, Seoul 151-747, KoreaG. JoverInstitut de Fisica d’Altes Energies, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Barcelona), SpainC. K. JungDepartment of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800, USAT. KajitaResearch Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, JapanJ. KamedaKamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, JapanK. KaneyukiResearch Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, JapanI. KatoTRIUMF, Vancouver, British Columbia, Canada V6T 2A3E. KearnsDepartment of Physics, Boston University, Boston, Massachusetts 02215, USAD. KerrDepartment of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800, USAC. O. KimDepartment of Physics, Korea University, Seoul 136-701, KoreaM. KhabibullinInstitute for Nuclear Research, Moscow 117312, RussiaA. KhotjantsevInstitute for Nuclear Research, Moscow 117312, RussiaD. KiełczewskaA. Soltan Institute for Nuclear Studies, 00-681 Warsaw, PolandJ. Y. KimDepartment of Physics, Chonnam National University, Kwangju 500-757, KoreaS. B. KimDepartment of Physics, Seoul National University, Seoul 151-747, KoreaP. KitchingTRIUMF, Vancouver, British Columbia, Canada V6T 2A3Kazuyoshi KobayashiDepartment of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800, USAT. KobayashiHigh Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, JapanA. KonakaTRIUMF, Vancouver, British Columbia, Canada V6T 2A3Y. KoshioKamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, JapanW. KroppDepartment of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, USAJun KubotaDepartment of Physics, Kyoto University, Kyoto 606-8502, JapanY. KudenkoInstitute for Nuclear Research, Moscow 117312, RussiaY. KunoDepartment of Physics, Osaka University, Toyonaka, Osaka 560-0043, JapanYoshinori KurimotoDepartment of Physics, Kyoto University, Kyoto 606-8502, JapanT. KutterDepartment of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1J. G. LearnedDepartment of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USAS. LikhodedDepartment of Physics, Boston University, Boston, Massachusetts 02215, USAI. T. LimDepartment of Physics, Chonnam National University, Kwangju 500-757, KoreaP. LoverreUniversity of Rome La Sapienza and INFN, I-000185 Rome, ItalyL. LudoviciUniversity of Rome La Sapienza and INFN, I-000185 Rome, ItalyH. MaesakaDepartment of Physics, Kyoto University, Kyoto 606-8502, JapanJ. MalletCEA Paris-SaclayC. MarianiUniversity of Rome La Sapienza and INFN, I-000185 Rome, ItalyS. MatsunoDepartment of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USAV. MatveevInstitute for Nuclear Research, Moscow 117312, RussiaK. B. M. MahnDepartment of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USAC. McGrewDepartment of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800, USAS. MikheyevInstitute for Nuclear Research, Moscow 117312, RussiaA. MinaminoKamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, JapanS. MineDepartment of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, USAO. MineevInstitute for Nuclear Research, Moscow 117312, RussiaC. MitsudaKamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, JapanM. MiuraKamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, JapanY. MoriguchiKobe University, Kobe, Hyogo 657-8501, JapanT. MoritaDepartment of Physics, Kyoto University, Kyoto 606-8502, JapanS. MoriyamaKamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, JapanT. NakadairaHigh Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, JapanM. NakahataKamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, JapanK. NakamuraHigh Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, JapanI. NakanoDepartment of Physics, Okayama University, Okayama, Okayama 700-8530, JapanT. NakayaDepartment of Physics, Kyoto University, Kyoto 606-8502, Japan
2006en
ABI
Аннотация
The weak nucleon axial-vector form factor for quasielastic interactions is determined using neutrino interaction data from the K2K Scintillating Fiber detector in the neutrino beam at KEK. More than 12 000 events are analyzed, of which half are charged-current quasielastic interactions ${\ensuremath{\nu}}_{\ensuremath{\mu}}n\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}p$ occurring primarily in oxygen nuclei. We use a relativistic Fermi gas model for oxygen and assume the form factor is approximately a dipole with one parameter, the axial-vector mass ${M}_{A}$, and fit to the shape of the distribution of the square of the momentum transfer from the nucleon to the nucleus. Our best fit result for ${M}_{A}=1.20\ifmmode\pm\else\textpm\fi{}0.12\text{ }\text{ }\mathrm{GeV}$. Furthermore, this analysis includes updated vector form factors from recent electron scattering experiments and a discussion of the effects of the nucleon momentum on the shape of the fitted distributions.
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