Search for Double Charged Particles as Direct Test for Dark Atom Constituents - INSPIRE

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Search for Double Charged Particles as Direct Test for Dark Atom Constituents

O.V. Bulekov
(
- Moscow Phys. Eng. Inst.
)
,
M. Yu. Khlopov
(
- Moscow Phys. Eng. Inst. and
- COSMION, Moscow and
- APC, Paris
)
,
A.S. Romaniouk
(
- Moscow Phys. Eng. Inst. and
- CERN
)
,
Yu. S. Smirnov
(
- Moscow Phys. Eng. Inst.
)

Nov 29, 2017

14 pages

Part of Proceedings, 20th Workshop on What Comes Beyond the Standard Models? : Bled, Slovenia, July 9-17, 2017, 11-24

Published in:

Bled Workshops Phys. 18 (2017) 2, 11-24

Contribution to:

20th Workshop on What Comes Beyond the Standard Models?, 11-24

e-Print:

1711.10773 [hep-ph]

View in:

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Abstract: (arXiv)

The nonbaryonic dark matter of the Universe is assumed to consist of new stable particles. Stable particle candidates for cosmological dark matter are usually considered as neutral and weakly interacting. However stable charged leptons and quarks can also exist hidden in elusive dark atoms and can play a role of dark matter. Such possibility is strongly restricted by the constraints on anomalous isotopes of light elements that form positively charged heavy species with ordinary electrons. This problem might be avoided, if stable particles with charge -2 exist and there are no stable particles with charges +1 and -1. These conditions cannot be realized in supersymmetric models, but can be satisfied in several alternative scenarios, which are discussed in this paper. The excessive -2 charged particles are bound with primordial helium in O-helium atoms, maintaining specific nuclear-interacting form of the dark matter. O-helium dark matter can provide solution for the puzzles of dark matter searches. The successful development of composite dark matter scenarios appeals to experimental search for doubly charged constituents of dark atoms. Estimates of production cross section of such particles at LHC are presented and discussed. Signatures of double charged particles in the ATLAS experiment are outlined.

Note:

Prepared for Proceedings of XX Bled Workshop "What comes beyond the Standard Model?"

new physics
helium: bound state
helium: primordial
new particle
charge: 2
atom: dark matter
dark matter: composite
dark matter: mass
dark matter: charged particle

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