Bounds on cross sections and lifetimes for dark matter annihilation and decay into charged leptons from gamma-ray observations of dwarf galaxies

被引：104

作者：

Essig, Rouven ^{[1
]}

Sehgal, Neelima ^{[2
]}

Strigari, Louis E. ^{[2
]}

机构：

[1] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

[2] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW D | 2009年 / 80卷 / 02期

关键词：

ELECTRONS; POSITRON; EMISSION; SATELLITES; SPECTRA; PAMELA;

D O I：

10.1103/PhysRevD.80.023506

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We provide conservative bounds on the dark matter cross section and lifetime from final state radiation produced by annihilation or decay into charged leptons, either directly or via an intermediate particle phi. Our analysis utilizes the experimental gamma-ray flux upper limits from four Milky Way dwarf satellites: HESS observations of Sagittarius and VERITAS observations of Draco, Ursa Minor, and Willman 1. Using 90% confidence level lower limits on the integrals over the dark matter distributions, we find that these constraints are largely unable to rule out dark matter annihilations or decays as an explanation of the PAMELA and ATIC/PPB-BETS excesses. However, if there is an additional Sommerfeld enhancement in dwarfs, which have a velocity dispersion similar to 10 to 20 times lower than that of the local Galactic halo, then the cross sections for dark matter annihilating through phi's required to explain the excesses are very close to the cross-section upper bounds from Willman 1. Dark matter annihilation directly into tau's is also marginally ruled out by Willman 1 as an explanation of the excesses, and the required cross section is only a factor of a few below the upper bound from Draco. Finally, we make predictions for the gamma-ray flux expected from the dwarf galaxy Segue 1 for the Fermi Gamma-ray Space Telescope. We find that for a sizeable fraction of the parameter space in which dark matter annihilation into charged leptons explains the PAMELA excess, Fermi has good prospects for detecting a gamma-ray signal from Segue 1 after 1 yr of observation.

引用

页数：11

共 96 条

[1] Measurement of the Cosmic Ray e++e- Spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope [J].

Abdo, A. A. ;

Ackermann, M. ;

Ajello, M. ;

Atwood, W. B. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Bastieri, D. ;

Battelino, M. ;

Baughman, B. M. ;

Bechtol, K. ;

Bellazzini, R. ;

Berenji, B. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bogaert, G. ;

Bonamente, E. ;

Borgland, A. W. ;

Bregeon, J. ;

Brez, A. ;

Brigida, M. ;

Bruel, P. ;

Burnett, T. H. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Caraveo, P. A. ;

Carlson, P. ;

Casandjian, J. M. ;

Cecchi, C. ;

Charles, E. ;

Chekhtman, A. ;

Cheung, C. C. ;

Chiang, J. ;

Ciprini, S. ;

Claus, R. ;

Cohen-Tanugi, J. ;

Cominsky, L. R. ;

Conrad, J. ;

Cutini, S. ;

Dermer, C. D. ;

de Angelis, A. ;

de Palma, F. ;

Digel, S. W. ;

Di Bernardo, G. ;

do Couto e Silva, E. ;

Drell, P. S. ;

Dubois, R. ;

Dumora, D. ;

Edmonds, Y. .

PHYSICAL REVIEW LETTERS, 2009, 102 (18)

[2] New Measurement of the Antiproton-to-Proton Flux Ratio up to 100 GeV in the Cosmic Radiation [J].

Adriani, O. ;

Barbarino, G. C. ;

Bazilevskaya, G. A. ;

Bellotti, R. ;

Boezio, M. ;

Bogomolov, E. A. ;

Bonechi, L. ;

Bongi, M. ;

Bonvicini, V. ;

Bottai, S. ;

Bruno, A. ;

Cafagna, F. ;

Campana, D. ;

Carlson, P. ;

Casolino, M. ;

Castellini, G. ;

De Pascale, M. P. ;

De Rosa, G. ;

Fedele, D. ;

Galper, A. M. ;

Grishantseva, L. ;

Hofverberg, P. ;

Leonov, A. ;

Koldashov, S. V. ;

Krutkov, S. Y. ;

Kvashnin, A. N. ;

Malvezzi, V. ;

Marcelli, L. ;

Menn, W. ;

Mikhailov, V. V. ;

Minori, M. ;

Mocchiutti, E. ;

Nagni, M. ;

Orsi, S. ;

Osteria, G. ;

Papini, P. ;

Pearce, M. ;

Picozza, P. ;

Ricci, M. ;

Ricciarini, S. B. ;

Simon, M. ;

Sparvoli, R. ;

Spillantini, P. ;

Stozhkov, Y. I. ;

Taddei, E. ;

Vacchi, A. ;

Vannuccini, E. ;

Vasilyev, G. ;

Voronov, S. A. ;

Yurkin, Y. T. .

PHYSICAL REVIEW LETTERS, 2009, 102 (05)

[3]

ADRIANI O, ARXIV08104995

[4] Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01 [J].

Aguilar, M. ;

Alcaraz, J. ;

Allaby, J. ;

Alpat, B. ;

Ambrosi, G. ;

Anderhub, H. ;

Ao, L. ;

Arefiev, A. ;

Azzarello, P. ;

Baldini, L. ;

Basile, M. ;

Barancourt, D. ;

Barao, F. ;

Barbier, G. ;

Barreira, G. ;

Battiston, R. ;

Becker, R. ;

Becker, U. ;

Bellagamba, L. ;

Bene, P. ;

Berdugo, J. ;

Berges, R. ;

Bertucci, B. ;

Biland, A. ;

Blasko, S. ;

Boella, G. ;

Boschini, M. ;

Bourquin, M. ;

Brocco, L. ;

Bruni, G. ;

Buenerd, M. ;

Burger, J. D. ;

Burger, W. J. ;

Cai, X. D. ;

Camps, C. ;

Cannarsa, P. ;

Capell, M. ;

Cardano, F. ;

Casadei, D. ;

Casaus, J. ;

Castellini, G. ;

Chang, Y. H. ;

Chen, H. F. ;

Chen, H. S. ;

Chen, Z. G. ;

Chernoplekov, N. A. ;

Chiueh, T. H. ;

Cho, K. ;

Choi, M. J. ;

Choi, Y. Y. .

PHYSICS LETTERS B, 2007, 646 (04) :145-154

[5] Observations of the Sagittarius dwarf galaxy by the HESS experiment and search for a dark matter signal [J].

Aharonian, F. ;

Akhperjanian, A. G. ;

Bazer-Bachi, A. R. ;

Beilicke, M. ;

Benbow, W. ;

Berge, D. ;

Bernloehr, K. ;

Boisson, C. ;

Bolz, O. ;

Borrel, V. ;

Braun, I. ;

Brion, E. ;

Brown, A. M. ;

Buehler, R. ;

Buesching, I. ;

Boutelier, T. ;

Carrigan, S. ;

Chadwick, P. M. ;

Chounet, L. -M. ;

Coignet, G. ;

Cornils, R. ;

Costamante, L. ;

Degrange, B. ;

Dickinson, H. J. ;

Djannati-Ataie, A. ;

Drury, L. O'C. ;

Dubus, G. ;

Egberts, K. ;

Emmanoulopoulos, D. ;

Espigat, P. ;

Farnier, C. ;

Feinstein, F. ;

Ferrero, E. ;

Fiasson, A. ;

Fontaine, G. ;

Funk, Seb. ;

Funk, S. ;

Fuessling, M. ;

Gallant, Y. A. ;

Giebels, B. ;

Glicenstein, J. F. ;

Glueck, B. ;

Goret, P. ;

Hadjichristidis, C. ;

Hauser, D. ;

Hauser, M. ;

Heinzelmann, G. ;

Henri, G. ;

Hermann, G. ;

Hinton, J. A. .

ASTROPARTICLE PHYSICS, 2008, 29 (01) :55-62

[6] Upper limit for γ-ray emission above 140 GeV from the dwarf spheroidal galaxy Draco [J].

Albert, J. ;

Aliu, E. ;

Anderhub, H. ;

Antoranz, P. ;

Backes, M. ;

Baixeras, C. ;

Barrio, J. A. ;

Bartko, H. ;

Bastieri, D. ;

Becker, J. K. ;

Bednarek, W. ;

Berger, K. ;

Bigongiari, C. ;

Biland, A. ;

Bock, R. K. ;

Bordas, P. ;

Bosch-Ramon, V. ;

Bretz, T. ;

Britvitch, I. ;

Camara, M. ;

Carmona, E. ;

Chilingarian, A. ;

Commichau, S. ;

Contreras, J. L. ;

Cortina, J. ;

Costado, M. T. ;

Curtef, V. ;

Danielyan, V. ;

Dazzi, F. ;

De Angelis, A. ;

Delgado, C. ;

de los Reyes, R. ;

De Lotto, B. ;

De Maria, M. ;

De Sabata, F. ;

Dorner, D. ;

Doro, M. ;

Errando, M. ;

Fagiolini, M. ;

Ferenc, D. ;

Fernandez, E. ;

Firpo, R. ;

Fonseca, M. V. ;

Font, L. ;

Fuchs, M. ;

Galante, N. ;

Garcia-Lopez, R. J. ;

Garczarczyk, M. ;

Gaug, M. ;

Goebel, F. .

ASTROPHYSICAL JOURNAL, 2008, 679 (01) :428-431

[7]

ALIU E, ARXIV08103561 MAGIC

[8]

ALLAHVERDI R, ARXIV09023463

[9] Supersymmetric B-L dark matter model and the observed anomalies in the cosmic rays [J].

Allahverdi, Rouzbeh ;

Dutta, Bhaskar ;

Richardson-McDaniel, Katherine ;

Santoso, Yudi .

PHYSICAL REVIEW D, 2009, 79 (07)

[10] A theory of dark matter [J].

Arkani-Hamed, Nima ;

Finkbeiner, Douglas P. ;

Slatyer, Tracy R. ;

Weiner, Neal .

PHYSICAL REVIEW D, 2009, 79 (01)

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