Research output: Contribution to journal › Article › peer-review
Balancing asymmetric dark matter with baryon asymmetry and dilution of frozen dark matter by sphaleron transition. / Chaudhuri, Arnab; Khlopov, Maxim Yu.
In: Universe, Vol. 7, No. 8, 275, 08.2021.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Balancing asymmetric dark matter with baryon asymmetry and dilution of frozen dark matter by sphaleron transition
AU - Chaudhuri, Arnab
AU - Khlopov, Maxim Yu
N1 - Funding Information: Funding: The work of A.C. is funded by RSF Grant 19-42-02004. The research by M.K. was financially supported by grant of the Russian Science Foundation (Project No-18-12-00213-P). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/8
Y1 - 2021/8
N2 - In this paper, we study the effect of electroweak sphaleron transition and electroweak phase transition (EWPT) in balancing the baryon excess and the excess stable quarks of the 4th generation. Sphaleron transitions between baryons, leptons and the 4th family of leptons and quarks establish a definite relationship between the value and sign of the 4th family excess and baryon asymmetry. This relationship provides an excess of stable Ū antiquarks, forming dark atoms—the bound state of (ŪŪŪ) the anti-quark cluster and primordial helium nucleus. If EWPT is of the second order and the mass of U quark is about 3.5 TeV, then dark atoms can explain the observed dark matter density. In passing by, we show the small, yet negligible dilution in the pre-existing dark matter density, due to the sphaleron transition.
AB - In this paper, we study the effect of electroweak sphaleron transition and electroweak phase transition (EWPT) in balancing the baryon excess and the excess stable quarks of the 4th generation. Sphaleron transitions between baryons, leptons and the 4th family of leptons and quarks establish a definite relationship between the value and sign of the 4th family excess and baryon asymmetry. This relationship provides an excess of stable Ū antiquarks, forming dark atoms—the bound state of (ŪŪŪ) the anti-quark cluster and primordial helium nucleus. If EWPT is of the second order and the mass of U quark is about 3.5 TeV, then dark atoms can explain the observed dark matter density. In passing by, we show the small, yet negligible dilution in the pre-existing dark matter density, due to the sphaleron transition.
KW - 4th generation
KW - Early universe
KW - Electroweak phase transition
UR - http://www.scopus.com/inward/record.url?scp=85112280907&partnerID=8YFLogxK
U2 - 10.3390/universe7080275
DO - 10.3390/universe7080275
M3 - Article
AN - SCOPUS:85112280907
VL - 7
JO - Universe
JF - Universe
SN - 2218-1997
IS - 8
M1 - 275
ER -
ID: 33981589