Charge-separated atmospheric neutrino-induced muons in the MINOS far detector

被引：18

作者：

Adamson, P.

Andreopoulos, C.

Arms, K. E.

Armstrong, R.

Auty, D. J.

Avvakumov, S.

Ayres, D. S.

Baller, B.

Barish, B.

Barnes, P. D., Jr.

Barr, G.

Barrett, W. L.

Beall, E.

Becker, B. R.

Belias, A.

Bergfeld, T.

Bernstein, R. H.

Bhattacharya, D.

Bishai, M.

Blake, A.

Bock, B.

Bock, G. J.

Boehm, J.

Boehnlein, D. J.

Bogert, D.

Border, P. M.

Bower, C.

Buckley-Geer, E.

Cabrera, A.

Chapman, J. D.

Cherdack, D.

Childress, S.

Choudhary, B. C.

Cobb, J. H.

Culling, A. J.

de Jong, J. K.

De Santo, A.

Dierckxsens, M.

Diwan, M. V.

Dorman, M.

Drakoulakos, D.

Durkin, T.

Erwin, A. R.

Escobar, C. O.

Evans, J. J.

Harris, E. Falk

Feldman, G. J.

Fields, T. H.

Ford, R.

Frohne, M. V.

机构：

[1] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] Univ Athens, Dept Phys, GR-15771 Athens, Greece

[4] Benedictine Univ, Dept Phys, Lisle, IL 60532 USA

[5] Brookhaven Natl Lab, Upton, NY 11973 USA

[6] CALTECH, Lauritsen Univ, Pasadena, CA 91125 USA

[7] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[8] Univ Estadual Campinas, IF, BR-13083970 Campinas, SP, Brazil

[9] Coll France, APC, F-75231 Paris 05, France

[10] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[11] IIT, Div Phys, Chicago, IL 60616 USA

[12] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[13] Indiana Univ, Dept Astron, Bloomington, IN 47405 USA

[14] Inst High Energy Phys, RU-140284 Protvino, Moscow, Russia

[15] Inst Theoret & Expt Phys, High Energy Expt Phys Dept, Moscow 117218, Russia

[16] James Madison Univ, Dept Phys, Harrisonburg, VA 22807 USA

[17] PN Lebedev Phys Inst, Dept Nucl Phys, Moscow 117924, Russia

[18] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[19] UCL, Dept Phys & Astron, London WC1E 6BT, England

[20] Univ Minnesota, Minneapolis, MN 55455 USA

[21] Univ Minnesota, Dept Phys, Duluth, MN 55812 USA

[22] Univ Oxford, Subdept Particle Phys, Oxford OX1 3RH, England

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

[24] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[25] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

[26] Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA

[27] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[28] Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England

[29] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA

[30] Univ Texas, Dept Phys, Austin, TX 78712 USA

[31] Tufts Univ, Dept Phys, Medford, MA 02155 USA

[32] Western Washington Univ, Dept Phys, Bellingham, WA 98225 USA

[33] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA

[34] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

来源：

PHYSICAL REVIEW D | 2007年 / 75卷 / 09期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevD.75.092003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We found 140 neutrino-induced muons in 854.24 live days in the MINOS far detector, which has an acceptance for neutrino-induced muons of 6.91x10(6) cm(2) sr. We looked for evidence of neutrino disappearance in this data set by computing the ratio of the number of low momentum muons to the sum of the number of high momentum and unknown momentum muons for both data and Monte Carlo expectation in the absence of neutrino oscillations. The ratio of data and Monte Carlo ratios, R, is R=0.65(-0.12)(+0.15)(stat)+/- 0.09(syst), a result that is consistent with an oscillation signal. A fit to the data for the oscillation parameters sin(2)2 theta(23) and Delta m(23)(2) excludes the null oscillation hypothesis at the 94% confidence level. We separated the muons into mu(-) and mu(+) in both the data and Monte Carlo events and found the ratio of the total number of mu(-) to mu(+) in both samples. The ratio of those ratios, R boolean AND(CPT), is a test of CPT conservation. The result R boolean AND(CPT)=0.72(-0.18)(+0.24)(stat)(-0.04)(+0.08)(syst) is consistent with CPT conservation.

引用

页数：14

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