Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Grand unification energy"'
Autor:
Graham G. Ross, John D. Barrow
The variation of cosmic baryon number generation with grand unification energy is investigated in a variety of cosmological models. We show that ‘low’ energy unification schemes of the Pati-Salam type will not generate a significant cosmological
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7cc430b335fb60074bf78c32e461ba64
https://ora.ox.ac.uk/objects/uuid:c674ba1a-3bc8-42c8-aa6d-ff371aa15af9
https://ora.ox.ac.uk/objects/uuid:c674ba1a-3bc8-42c8-aa6d-ff371aa15af9
Publikováno v:
International Journal of Modern Physics E. 20:245-253
The extension of study done in a previous work about the dilaton mean field stabilization thanks to the potential generated by massive fermions, is reviewed. Three loop corrections were evaluated in addition to the previously calculated two loop term
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d41cb1faa1df6339c5ca971b6a559f5
https://doi.org/10.1142/s0218301311040323
https://doi.org/10.1142/s0218301311040323
Autor:
Alex E. Bernardini
Publikováno v:
Communications in Theoretical Physics. 47:879-882
We introduce the sequence of spontaneous symmetry breaking of a coupling between Pati-Salam and electroweak symmetries $SU(4)_{PS} \otimes SU(4)_{EW}$ in order to establish a mathematically consistent relation among the coupling constants at grand un
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c66e910bea076163110045b056e790bb
https://doi.org/10.1088/0253-6102/47/5/022
https://doi.org/10.1088/0253-6102/47/5/022
Autor:
Maresuke Shiraishi
We study the parity violation in the cosmic microwave background (CMB) bispectrum induced by primordial magnetic fields (PMFs). Deriving a general formula for the CMB bispectrum generated from not only non-helical but also helical PMFs, we find that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25835862c7b2127202f8b16c15307aa0
http://arxiv.org/abs/1202.2847
http://arxiv.org/abs/1202.2847
The study started in a former work about the Dilaton mean field stabilization thanks to the effective potential generated by the existence of massive fermions, is here extended. Three loop corrections are evaluated in addition to the previously calcu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1182a9cf465bcd1c3758d8f115baa440
http://arxiv.org/abs/1011.4871
http://arxiv.org/abs/1011.4871
Autor:
Takahiro Okabe, Michiyasu Nagasawa
The formation probability of multiple winding topological defects is calculated by phase and flux distribution analysis based on the Kibble mechanism. The core size of defects is taken into account so that when it is much larger than the correlation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::87e35fa9953ef5855d891f3dcf9db941
http://arxiv.org/abs/hep-ph/9905401
http://arxiv.org/abs/hep-ph/9905401
Autor:
Pijushpani Bhattacharjee, Günter Sigl
Publikováno v:
Physical review. D, Particles and fields. 51(8)
Cosmic rays with energies exceeding $10^{20}\eV$ have been detected. The origin of these highest energy cosmic rays remains unknown. Established astrophysical acceleration mechanisms encounter severe difficulties in accelerating particles to these en
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cae52a44fbf97dbb932546ce0b2a0792
https://pubmed.ncbi.nlm.nih.gov/10018882
https://pubmed.ncbi.nlm.nih.gov/10018882
Autor:
G. Sigl
In this paper we review the hypothesis that a considerable part of the cosmic ray flux observed above about $10^{19}\eV$ may be produced by decaying or annihilating topological defects left over from phase transitions in the early universe at grand u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c20dc301503685596398470c649c8b3b
http://arxiv.org/abs/astro-ph/9503014
http://arxiv.org/abs/astro-ph/9503014
Autor:
B.L. Spokoiny
Publikováno v:
Physics Letters B. 147:39-43
A grand unified theory is presented in which all dimensional constants (masses and Newton's gravitational constant) arise due to spontaneous symmetry breaking. The necessary smallness of the amplitude of adiabatic perturations results from the small
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e75a641ddee5243fc4abf82299dbb48
https://doi.org/10.1016/0370-2693(84)90587-2
https://doi.org/10.1016/0370-2693(84)90587-2
Publikováno v:
Physics Letters B. 129:80-84
We discuss in an SU (3) C X SU (2) W X U (1) Y gauge model with softly broken symmetry, the upper bounds on masses of the Higgs particle ( m H ) and the quark of the fourth generation ( m U ), and also the lower bound on Higgs mass. Requiring that no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02aef7ee4f511f9b1621b30c31826486
https://doi.org/10.1016/0370-2693(83)90733-5
https://doi.org/10.1016/0370-2693(83)90733-5