Sommerfeld-enhanced annihilation in dark matter substructure: Consequences for constraints on cosmic-ray excesses - INSPIRE

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Sommerfeld-enhanced annihilation in dark matter substructure: Consequences for constraints on cosmic-ray excesses

Jul, 2011

18 pages

Published in:

Phys.Rev.D 86 (2012) 083534

e-Print:

1107.3546 [hep-ph]

DOI:

10.1103/PhysRevD.86.083534

Report number:

NSF-KITP-11-165

View in:

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Abstract: (arXiv)

In models of dark matter (DM) with Sommerfeld-enhanced annihilation, where the annihilation rate scales as the inverse velocity, N-body simulations of DM structure formation suggest that the local annihilation signal may be dominated by small, dense, cold subhalos. This contrasts with the usual assumption of a signal originating from the smooth DM halo, with much higher velocity dispersion. Accounting for local substructure modifies the parameter space for which Sommerfeld-enhanced annihilating DM can explain the PAMELA and Fermi excesses. Limits from the inner galaxy and the cosmic microwave background are weakened, without introducing new tension with substructure-dependent limits, such as from dwarf galaxies or isotropic gamma-ray studies. With substructure, previously excluded parameter regions with mediators of mass ~1-200 MeV are now easily allowed. For O(MeV) mediators, subhalos in a specific range of host halo masses may be evaporated, further suppressing diffuse signals without affecting substructure in the Milky Way.

Note:

17 pages, 7 figures. v2 adds the KITP preprint number and a comment on accelerator searches for light gauge bosons, v3 modifies title and text for clarity, accepted by PRD

95.35.+d
dark matter: halo
halo: mass
velocity: dispersion
dark matter: annihilation
mediation
galaxy
cosmic background radiation
cross section: annihilation
dark matter: mass

References(96)

Figures(13)

[1]

An anomalous positron abundance in cosmic rays with energies 1.5-100 GeV

PAMELA

Collaboration

•

Oscar Adriani
(
- Florence U. and
- INFN, Florence
)

et al.

- Nature 458 (2009) 607-609
•
e-Print:
- 0810.4995
•
DOI:
- 10.1038/nature07942

[2]

Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope

Fermi-LAT

Collaboration

•

Aous A. Abdo
(
- Naval Research Lab, Wash., D.C.
)

et al.

- Phys.Rev.Lett. 102 (2009) 181101
•
e-Print:
- 0905.0025
•
DOI:
- 10.1103/PhysRevLett.102.181101

[3]

Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV

Fermi-LAT

Collaboration

•

M. Ackermann
(
- Stanford U., HEPL and
- Taiwan, Natl. Taiwan U. and
- SLAC
)

et al.

- Phys.Rev.D 82 (2010) 092004
•
e-Print:
- 1008.3999
•
DOI:
- 10.1103/PhysRevD.82.092004

[4]

An excess of cosmic ray electrons at energies of 300-800 GeV

et al.

- Nature 456 (2008) 362-365
•
DOI:
- 10.1038/nature07477

[5]

Possible structure in the cosmic ray electron spectrum measured by the ATIC-2 and ATIC-4 experiments

et al.

- Astrophys.Space Sci.Trans. 7 (2011) 119-124
•
e-Print:
- 1104.3452
•
DOI:
- 10.5194/astra-7-119-2011

[6]

Measurement of separate cosmic-ray electron and positron spectra with the Fermi Large Area Telescope

Fermi-LAT

Collaboration

•

M. Ackermann
(
)

et al.

- Phys.Rev.Lett. 108 (2012) 011103
•
e-Print:
- 1109.0521
•
DOI:
- 10.1103/PhysRevLett.108.011103

[7]

Exciting Dark Matter and the INTEGRAL/SPI 511 keV signal

- Phys.Rev.D 76 (2007) 083519
•
e-Print:
- astro-ph/0702587
•
DOI:
- 10.1103/PhysRevD.76.083519

[8]

A Theory of Dark Matter

- Phys.Rev.D 79 (2009) 015014
•
e-Print:
- 0810.0713
•
DOI:
- 10.1103/PhysRevD.79.015014

[9]

Astrophysical Signatures of Secluded Dark Matter

Maxim Pospelov
(
- Victoria U. and
- Perimeter Inst. Theor. Phys.
)
,
Adam Ritz
(
- Victoria U.
)

- Phys.Lett.B 671 (2009) 391-397
•
e-Print:
- 0810.1502
•
DOI:
- 10.1016/j.physletb.2008.12.012

[10]

The Sommerfeld enhancement was first discussed in the context of dark matter by Refs. [11,12]

[11]

Explosive dark matter annihilation

Junji Hisano
(
- Tokyo U., ICRR
)
,
Shigeki Matsumoto
(
- Tokyo U., ICRR
)
,
Mihoko M. Nojiri
(
- Kyoto U., Yukawa Inst., Kyoto
)

- Phys.Rev.Lett. 92 (2004) 031303
•
e-Print:
- hep-ph/0307216
•
DOI:
- 10.1103/PhysRevLett.92.031303

[12]

Non-perturbative effect on dark matter annihilation and gamma ray signature from galactic center

Junji Hisano
(
- Tokyo U., ICRR
)
,
Shigeki. Matsumoto
(
- Tokyo U., ICRR
)
,
Mihoko M. Nojiri
(
- Kyoto U., Yukawa Inst., Kyoto
)
,
Osamu Saito
(
- Tokyo U., ICRR
)

- Phys.Rev.D 71 (2005) 063528
•
e-Print:
- hep-ph/0412403
•
DOI:
- 10.1103/PhysRevD.71.063528

[13]

Consistent Scenarios for Cosmic-Ray Excesses from Sommerfeld-Enhanced Dark Matter Annihilation

- JCAP 05 (2011) 002
•
e-Print:
- 1011.3082
•
DOI:
- 10.1088/1475-7516/2011/05/002

[14]

Can the WIMP annihilation boost factor be boosted by the Sommerfeld enhancement?

Massimiliano Lattanzi
(
- ICRA, Rome
)
,
Joseph I. Silk
(
- Oxford U.
)

- Phys.Rev.D 79 (2009) 083523
•
e-Print:
- 0812.0360
•
DOI:
- 10.1103/PhysRevD.79.083523

[15]

ATIC, PAMELA, HESS, Fermi and nearby Dark Matter subhalos

- Phys.Rev.D 79 (2009) 123517
•
e-Print:
- 0904.3378
•
DOI:
- 10.1103/PhysRevD.79.123517

[16]

Exploring Dark Matter with Milky Way substructure

- Science 325 (2009) 970-973
•
e-Print:
- 0907.0005
•
DOI:
- 10.1126/science.1174881

[17]

Substructure Boosts to Dark Matter Annihilation from Sommerfeld Enhancement

Jo Bovy
(
- New York U.
)

- Phys.Rev.D 79 (2009) 083539
•
e-Print:
- 0903.0413
•
DOI:
- 10.1103/PhysRevD.79.083539

[18]

Clumpiness enhancement of charged cosmic rays from dark matter annihilation with Sommerfeld effect

Qiang Yuan
(
- Beijing, Inst. High Energy Phys.
)
,
Xiao-Jun Bi
(
- Peking U., CHEP and
- Beijing, Inst. High Energy Phys.
)
,
Jia Liu
(
- Beijing, Inst. Theor. Phys. and
- Peking U.
)
,
Peng-Fei Yin
(
- Beijing, Inst. Theor. Phys. and
- Peking U.
)
,
Juan Zhang
(
- Beijing, Inst. High Energy Phys.
)

et al.

- JCAP 12 (2009) 011
•
e-Print:
- 0905.2736
•
DOI:
- 10.1088/1475-7516/2009/12/011

[19]

Overcoming Gamma Ray Constraints with Annihilating Dark Matter in Milky Way Subhalos

Aaron C. Vincent
(
- McGill U.
)
,
Wei Xue
(
- McGill U.
)
,
James M. Cline
(
- McGill U. and
- Perimeter Inst. Theor. Phys.
)

- Phys.Rev.D 82 (2010) 123519
•
e-Print:
- 1009.5383
•
DOI:
- 10.1103/PhysRevD.82.123519

[20]

Gamma-ray signatures of annihilation to charged leptons in dark matter substructure

Matthew D. Kistler
(
- Ohio State U., CCAPP and
- Ohio State U.
)
,
Jennifer M. Siegal-Gaskins
(
- Ohio State U., CCAPP and
- Ohio State U.
)

- Phys.Rev.D 81 (2010) 103521
•
e-Print:
- 0909.0519
•
DOI:
- 10.1103/PhysRevD.81.103521

[21]

Galactic Substructure and Dark Matter Annihilation in the Milky Way Halo

- Phys.Rev.D 81 (2010) 043532
•
e-Print:
- 1001.3144
•
DOI:
- 10.1103/PhysRevD.81.043532

[22]

Secluded U(1) below the weak scale

Maxim Pospelov
(
- Perimeter Inst. Theor. Phys. and
- Victoria U.
)

- Phys.Rev.D 80 (2009) 095002
•
e-Print:
- 0811.1030
•
DOI:
- 10.1103/PhysRevD.80.095002

[23]

Probing a Secluded U(1) at B-factories

Brian Batell
(
- Perimeter Inst. Theor. Phys.
)
,
Maxim Pospelov
(
- Perimeter Inst. Theor. Phys. and
- Victoria U.
)
,
Adam Ritz
(
- Victoria U.
)

- Phys.Rev.D 79 (2009) 115008
•
e-Print:
- 0903.0363
•
DOI:
- 10.1103/PhysRevD.79.115008

[24]

Probing Dark Forces and Light Hidden Sectors at Low-Energy e+e- Colliders

- Phys.Rev.D 80 (2009) 015003
•
e-Print:
- 0903.3941
•
DOI:
- 10.1103/PhysRevD.80.015003

[25]

Searching for the light dark gauge boson in GeV-scale experiments

Matthew Reece
(
- Princeton U., CTP
)
,
Lian-Tao Wang
(
- Princeton U.
)

- JHEP 07 (2009) 051
•
e-Print:
- 0904.1743
•
DOI:
- 10.1088/1126-6708/2009/07/051

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