Measurement of the neutrino-oxygen neutral-current interaction cross section by observing nuclear deexcitation γ rays

被引：27

作者：

Abe, K. ^{[51
]}

Adam, J. ^{[37
]}

Aihara, H. ^{[28
,50
]}

Akiri, T. ^{[9
]}

Andreopoulos, C. ^{[49
]}

Aoki, S. ^{[29
]}

Ariga, A. ^{[2
]}

Ariga, T. ^{[2
]}

Assylbekov, S. ^{[8
]}

Autiero, D. ^{[34
]}

Barbi, M. ^{[44
]}

Barker, G. J. ^{[59
]}

Barr, G. ^{[40
]}

Bass, M. ^{[8
]}

Batkiewicz, M. ^{[13
]}

Bay, F. ^{[11
]}

Bentham, S. W. ^{[31
]}

Berardi, V. ^{[19
,20
]}

Berger, B. E. ^{[8
]}

Berkman, S. ^{[4
]}

Bertram, I. ^{[31
]}

Bhadra, S. ^{[63
]}

Blaszczyk, F. d. M. ^{[33
]}

Blondel, A. ^{[12
]}

Bojechko, C. ^{[56
]}

Bordoni, S. ^{[15
]}

Boyd, S. B. ^{[59
]}

Brailsford, D. ^{[18
]}

Bravar, A. ^{[12
]}

Bronner, C. ^{[28
]}

Buchanan, N. ^{[8
]}

Calland, R. G. ^{[32
]}

Caravaca Rodriguez, J. ^{[15
]}

Cartwright, S. L. ^{[47
]}

Castillo, R. ^{[15
]}

Catanesi, M. G. ^{[19
,20
]}

Cervera, A. ^{[16
,17
]}

Cherdack, D. ^{[8
]}

Christodoulou, G. ^{[32
]}

Clifton, A. ^{[8
]}

Coleman, J. ^{[32
]}

Coleman, S. J. ^{[7
]}

Collazuol, G. ^{[23
,24
]}

Connolly, K. ^{[60
]}

Cremonesi, L. ^{[43
]}

Dabrowska, A. ^{[13
]}

Danko, I. ^{[42
]}

Das, R. ^{[8
]}

Davis, S. ^{[60
]}

de Perio, P. ^{[54
]}

机构：

[1] Univ Alberta, Dept Phys, Ctr Particle Phys, Edmonton, AB, Canada

[2] Univ Bern, Albert Einstein Ctr Fundamental Phys, High Energy Phys Lab, Bern, Switzerland

[3] Boston Univ, Dept Phys, Boston, MA 02215 USA

[4] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V5Z 1M9, Canada

[5] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA USA

[6] CEA Saclay, IRFU, F-91191 Gif Sur Yvette, France

[7] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[8] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA

[9] Duke Univ, Dept Phys, Durham, NC 27706 USA

[10] Ecole Polytech, CNRS, IN2P3, Lab Leprince, F-91128 Palaiseau, France

[11] ETH, Inst Particle Phys, Zurich, Switzerland

[12] Univ Geneva, DPNC, Sect Phys, CH-1211 Geneva, Switzerland

[13] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

[14] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki, Japan

[15] Inst Fis Altes Energies, Bellaterra, Barcelona, Spain

[16] CSIC, IFIC, Valencia, Spain

[17] Univ Valencia, Valencia, Spain

[18] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London, England

[19] Ist Nazl Fis Nucl, Dipartimento Interuniv Fis, Sez Bari, I-70126 Bari, Italy

[20] Univ Politecn Bari, Bari, Italy

[21] Ist Nazl Fis Nucl, Dipartmento Fis, Sez Napoli, I-80125 Naples, Italy

[22] Univ Naples Federico II, Naples, Italy

[23] Ist Nazl Fis Nucl, Dipartmento Fis, Sez Padova, Padua, Italy

[24] Univ Padua, Padua, Italy

[25] Ist Nazl Fis Nucl, Sez Roma, Rome, Italy

[26] Univ Roma La Sapienza, I-00185 Rome, Italy

[27] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[28] Univ Tokyo, Todai Inst Adv Study, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba, Japan

[29] Kobe Univ, Kobe, Hyogo 657, Japan

[30] Kyoto Univ, Dept Phys, Kyoto 606, Japan

[31] Univ Lancaster, Dept Phys, Lancaster, England

[32] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[33] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[34] Univ Lyon 1, IPN Lyon, IN2P3, F-69622 Villeurbanne, France

[35] Miyagi Univ Educ, Dept Phys, Sendai, Miyagi, Japan

[36] Natl Ctr Nucl Res, Warsaw, Poland

[37] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

[38] Okayama Univ, Dept Phys, Okayama 700, Japan

[39] Osaka City Univ, Dept Phys, Osaka 558, Japan

[40] Univ Oxford, Dept Phys, Oxford, England

[41] UPMC, Univ Paris Diderot, Lab Phys Nucl & Hautes Energies, CNRS IN2P3, Paris, France

[42] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[43] Queen Mary Univ London, Sch Phys & Astron, London, England

[44] Univ Regina, Dept Phys, Regina, SK S4S 0A2, Canada

[45] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA

[46] Rhein Westfal TH Aachen, Inst Phys 3, Aachen, Germany

[47] Univ Sheffield, Dept Phys & Astron, Sheffield, S Yorkshire, England

[48] Silesian Univ, Inst Phys, PL-40007 Katowice, Poland

[49] Rutherford Appleton Lab, Harwell Oxford & Daresbury Lab, STFC, Warrington, Cheshire, England

[50] Univ Tokyo, Dept Phys, Tokyo 113, Japan

来源：

PHYSICAL REVIEW D | 2014年 / 90卷 / 07期

基金：

加拿大自然科学与工程研究理事会;

关键词：

EXCITATION; ABSORPTION; SCATTERING; C-12; WEAK;

D O I：

10.1103/PhysRevD.90.072012

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the first measurement of the neutrino-oxygen neutral-current quasielastic (NCQE) cross section gamma It is obtained by observing nuclear deexcitation. rays which follow neutrino-oxygen interactions at the Super-Kamiokande water Cherenkov detector. We use T2K data corresponding to 3.01 x 10(20) protons on target. By selecting only events during the T2K beam window and with well-reconstructed vertices in the fiducial volume, the large background rate from natural radioactivity is dramatically reduced. We observe 43 events in the 4-30 MeV reconstructed energy window, compared with an expectation of 51.0, which includes an estimated 16.2 background events. The background is primarily nonquasielastic neutral-current interactions and has only 1.2 events from natural radioactivity. The flux-averaged NCQE cross section we measure is 1.55 x 10(-38) cm(2) with a 68% confidence interval of (1.22, 2.20) x 10(-38) cm(2) at a median neutrino energy of 630 MeV, compared with the theoretical prediction of 2.01 x 10(-38) cm(2).

引用

页数：11

共 49 条

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