Seasonal variations in the underground muon intensity as seen by MACRO

被引：105

作者：

Ambrosio, M

Antolini, R

Auriemma, G

Baker, R

Baldini, A

Barbarino, GC

Barish, BC

Battistoni, G

Bellotti, R

Bemporad, C

Bernardini, P

Bilokon, H

Bisi, V

Bloise, C

Bosio, T

Bower, C

Bussino, S

Cafagna, F

Calicchio, M

Campana, D

Carboni, M

Castellano, M

Cecchini, S

Cei, F

Chiarella, V

Corona, A

Coutu, S

DeBenedictis, L

DeCataldo, G

Dekhissi, H

DeMarzo, C

De Mitri, I

DeVincenzi, M

DiCredico, A

Erriquez, O

Fantini, R

Favuzzi, C

Forti, C

Fusco, P

Giacomelli, G

Giannini, G

Giglietto, N

Goretti, M

Grassi, M

Green, P

Grillo, A

Guarino, F

Guarnaccia, P

Gustavino, C

Habig, A

机构：

[1] IST NAZL FIS NUCL, I-80125 NAPLES, ITALY

[2] UNIV MICHIGAN, DEPT PHYS, ANN ARBOR, MI 48109 USA

[3] UNIV LECCE, DIPARTIMENTO FIS, I-73100 LECCE, ITALY

[4] IST NAZL FIS NUCL, I-73100 LECCE, ITALY

[5] UNIV AQUILA, DIPARTIMENTO FIS, I-67100 LAQUILA, ITALY

[6] IST NAZL FIS NUCL, I-67100 LAQUILA, ITALY

[7] INDIANA UNIV, DEPT PHYS, BLOOMINGTON, IN 47405 USA

[8] INDIANA UNIV, DEPT ASTRON, BLOOMINGTON, IN 47405 USA

[9] IST NAZL FIS NUCL, LAB NAZL GRAN SASSO, I-67010 ASSERGI, LAQUILA, ITALY

[10] IST NAZL FIS NUCL, LAB NAZL FRASCATI, I-00044 FRASCATI, ROMA, ITALY

[11] DREXEL UNIV, DEPT PHYS, PHILADELPHIA, PA 19104 USA

[12] CALTECH, PASADENA, CA 91125 USA

[13] BOSTON UNIV, DEPT PHYS, BOSTON, MA 02215 USA

[14] UNIV BOLOGNA, DIPARTIMENTO FIS, I-40126 BOLOGNA, ITALY

[15] IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY

[16] UNIV BARI, DIPARTIMENTO FIS, I-70126 BARI, ITALY

[17] IST NAZL FIS NUCL, I-70126 BARI, ITALY

[18] IST NAZL FIS NUCL, I-56010 PISA, ITALY

[19] UNIV PISA, DIPARTIMENTO FIS, I-56010 PISA, ITALY

[20] UNIV ROMA LA SAPIENZA, DIPARTIMENTO FIS, I-00185 ROME, ITALY

[21] IST NAZL FIS NUCL, I-00185 ROME, ITALY

[22] TEXAS A&M UNIV, DEPT PHYS, COLLEGE STN, TX 77843 USA

[23] UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, I-10125 TURIN, ITALY

[24] IST NAZL FIS NUCL, I-10125 TURIN, ITALY

[25] SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA

[26] SWARTHMORE COLL, SWARTHMORE, PA 19081 USA

[27] UNIV BASILICATA, I-85100 POTENZA, ITALY

[28] IST NAZL FIS NUCL, I-20133 MILAN, ITALY

[29] CNR, IST TESRE, I-40129 BOLOGNA, ITALY

[30] SCUOLA NORMALE SUPER PISA, I-56010 PISA, ITALY

[31] UNIV MOHAMED I, FAC SCI, OUJDA, MOROCCO

[32] UNIV ROMA TRE, DIPARTIMENTO FIS, ROME, ITALY

[33] UNIV TRIESTE, I-34100 TRIESTE, ITALY

[34] IST NAZL FIS NUCL, I-34100 TRIESTE, ITALY

[35] UNIV ROME, DIPARTIMENTO ENERGET, I-00185 ROME, ITALY

[36] RUSSIAN ACAD SCI, INST NUCL RES, MOSCOW 117312, RUSSIA

[37] INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA

来源：

ASTROPARTICLE PHYSICS | 1997年 / 7卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0927-6505(97)00011-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using 5.33 x 10(6) single muons collected in 1.46 x 10(4) live hours by MACRO during the period 1991-1994, we have searched for a correlation between variations in the underground muon rate, N-mu, and seasonal temperature variations in the atmosphere. These correlations are found to be present with high statistical significance. Analysis of the relatively complete December 1992-December 1994 subset of the data yields a value for the temperature coefficient, alpha(T) = (T/N-mu)(partial derivative N-mu/partial derivative T) = 0.83 +/- 0.13. Analysis of the total data Set gives consistent results. We have compared this result with the hypothesis that the muons observed in MACRO come from pion decays alone. Although our result is consistent with the 'pion only' hypothesis, a discussion of the sensitivity of our data sample to the kaon component of the cascades leading to observed muons underground will also be presented. (C) 1997 Elsevier Science B.V.

引用

页码：109 / 124

页数：16

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