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Unification, proton decay, and topological defects in non-SUSY GUTs with thresholds

Unification, proton decay, and topological defects in non-SUSY GUTs with thresholds
Unification, proton decay, and topological defects in non-SUSY GUTs with thresholds

We calculate the proton lifetime and discuss topological defects in a wide class of non-supersymmetric (non-SUSY) SO(10) and E(6) grand unified theories (GUTs), broken via left-right subgroups with one or two intermediate scales (a total of 9 different scenarios with and without D-parity), including the important effect of threshold corrections. By performing a goodness of fit test for unification using the two-loop renormalization group evolution equations (RGEs), we find that the inclusion of threshold corrections significantly affects the proton lifetime, allowing several scenarios, which would otherwise be excluded, to survive. Indeed we find that the threshold corrections are a savior for many non-SUSY GUTs. For each scenario we analyze the homotopy of the vacuum manifold to estimate the possible emergence of topological defects.

2470-0010
1-34
Chakrabortty, Joydeep
aeac0acb-1a8a-46be-a07c-b587b6fec929
Maji, Rinku
aa532a35-be49-458a-a5e8-6985be18798e
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538
Chakrabortty, Joydeep
aeac0acb-1a8a-46be-a07c-b587b6fec929
Maji, Rinku
aa532a35-be49-458a-a5e8-6985be18798e
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538

Chakrabortty, Joydeep, Maji, Rinku and King, Stephen F. (2019) Unification, proton decay, and topological defects in non-SUSY GUTs with thresholds. Physical Review D, 99 (9), 1-34, [095008]. (doi:10.1103/PhysRevD.99.095008).

Record type: Article

Abstract

We calculate the proton lifetime and discuss topological defects in a wide class of non-supersymmetric (non-SUSY) SO(10) and E(6) grand unified theories (GUTs), broken via left-right subgroups with one or two intermediate scales (a total of 9 different scenarios with and without D-parity), including the important effect of threshold corrections. By performing a goodness of fit test for unification using the two-loop renormalization group evolution equations (RGEs), we find that the inclusion of threshold corrections significantly affects the proton lifetime, allowing several scenarios, which would otherwise be excluded, to survive. Indeed we find that the threshold corrections are a savior for many non-SUSY GUTs. For each scenario we analyze the homotopy of the vacuum manifold to estimate the possible emergence of topological defects.

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e-pub ahead of print date: 14 May 2019

Identifiers

Local EPrints ID: 432032
URI: http://eprints.soton.ac.uk/id/eprint/432032
ISSN: 2470-0010
PURE UUID: 0934b5a8-5103-4051-972d-8038d24e0347

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Date deposited: 27 Jun 2019 16:30
Last modified: 14 Sep 2021 18:52

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