Parity at the Planck scale
File(s)
Published version
OA Location
Author(s)
Arzano, Michele
Gubitosi, Giulia
Magueijo, Joao
Type
Journal Article
Abstract
We explore the possibility that well known properties of the parity operator, such as its idempotency and unitarity, might break down at the Planck scale. Parity might then do more than just swap right and left polarized states and reverse the sign of spatial momentum k: it might generate superpositions of right and left handed states, as well as mix momenta of different magnitudes. We lay down the general formalism, but also consider the concrete case of the Planck scale kinematics governed by κ-Poincaré symmetries, where some of the general features highlighted appear explicitly. We explore some of the observational implications for cosmological fluctuations. Different power spectra for right handed and left handed tensor modes might actually be a manifestation of deformed parity symmetry at the Planck scale. Moreover, scale-invariance and parity symmetry appear deeply interconnected.
Date Issued
2018-06-10
Date Acceptance
2018-04-12
Citation
Physics Letters B, 2018, 781, pp.510-516
ISSN
0370-2693
Publisher
Elsevier
Start Page
510
End Page
516
Journal / Book Title
Physics Letters B
Volume
781
Copyright Statement
© 2018 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000435653100066&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Nuclear
Physics, Particles & Fields
Physics
Discrete symmetries
Quantum Gravity phenomenology
NONCOMMUTATIVE SPACE-TIME
DEFORMED FIELD-THEORY
POINCARE ALGEBRA
GRAVITY
Publication Status
Published
Date Publish Online
2018-04-17