Zobrazeno 1 - 10
of 819
pro vyhledávání: '"Barr, S A"'
Publikováno v:
In Journal of Environmental Management 14 February 2024 352
Autor:
Barr, S. M., Chen, Heng-Yu
As was shown in 1984 by Caneschi, Farrar, and Schwimmer, decomposing representations of the supergroup SU(M|N), can give interesting anomaly-free sets of fermion representations of SU(M) x SU(N) x U(1). It is shown here that such groups can be used t
Externí odkaz:
http://arxiv.org/abs/1609.00706
Autor:
Barr, S. M., Chen, Heng-Yu
Publikováno v:
Phys. Rev. D 93, 053009 (2016)
It is shown that an idea proposed in 1996 that relates in a qualitatively correct way the inter-family mass hierarchies of the up quarks, down quarks, charged leptons, and neutrinos, can be combined with a predictive scheme recently proposed for rela
Externí odkaz:
http://arxiv.org/abs/1511.05989
Autor:
Barr, S. M., Scherrer, Robert J.
Grand unified theories based on large groups (with rank greater or equal to 6 are a natural context for dark matter models. They contain Standard-Model-singlet fermions that could be dark matter candidates, and can contain new non-abelian interaction
Externí odkaz:
http://arxiv.org/abs/1508.07469
Autor:
Barr, S. M.
It is pointed out that there are infinite classes of cases based on gauge groups of the form SU(p)xSU(q)xU(1) in which gauge anomalies cancel non-trivially for small sets of fermion multiplets that include symmetric tensor representations. These canc
Externí odkaz:
http://arxiv.org/abs/1508.03313
Autor:
Barr, S. M., Kim, Jihn E.
Publikováno v:
Phys. Rev. Lett. 113, 241301 (2014)
The serious cosmological problems created by the axion-string/axion-domain-wall system in standard axion models are alleviated by positing the existence of a new confining force. The instantons of this force can generate an axion potential that erase
Externí odkaz:
http://arxiv.org/abs/1407.4311
Autor:
Barr, S. M., Calmet, X.
A unified model is constructed, based on flipped $SU(5)$ in which the proton is absolutely stable. The model requires the existence of new leptons with masses of order the weak scale. The possibility that the unification scale could be extremely low
Externí odkaz:
http://arxiv.org/abs/1404.4594
Autor:
Barr, S. M., Chen, Heng-Yu
Sphalerons of a new gauge interaction can convert a primordial asymmetry in B or L into a dark matter asymmetry. From the equilibrium conditions for the sphalerons of both the electroweak and the new interactions, one can compute the ratios of B, L,
Externí odkaz:
http://arxiv.org/abs/1309.0020
Autor:
Barr, S. M.
It is shown that by a simple extension of the fermion sector of flipped SU(5) models and other flipped models proton decay coming from dimension-6 operators can be suppressed by fermion mixing angles by an arbitrary amount in a natural way.
Comm
Comm
Externí odkaz:
http://arxiv.org/abs/1307.5770
Autor:
Barr, S. M., Chen, Heng-Yu
It is proposed that all flavor mixing is caused by the mixing of the three quark and lepton families with vectorlike fermions in 5 + 5-bar multiplets of SU(5). This simple assumption implies that both V_{CKM} and U_{MNS} are generated by a single mat
Externí odkaz:
http://arxiv.org/abs/1208.6546