Breaking CPT by mixed noncommutativity

Irina Mocioiu, Maxim Pospelov, Radu Roiban

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The mixed component of the noncommutative parameter θ0 μM, where μ=0,1,2,3 and M is an extra dimensional index, may violate four-dimensional CPT invariance. We calculate one- and two-loop induced couplings of θ μ5 with the four-dimensional axial vector current and with the CPT odd dim=6 operators starting from five-dimensional Yukawa and U(1) theories. The resulting bounds from clock comparison experiments place a stringent constraint on θ μ5, |θ μ5| -1/25×10 11 GeV. Orbifold projection and/or localization of fermions on a 3-brane lead to CPT-conserving physics, in which case the constraints on θ μ5 are softened.

Original languageEnglish (US)
Article number107702
JournalPhysical Review D
Volume65
Issue number10
DOIs
StatePublished - Dec 1 2002

Fingerprint

Noncommutativity
vector currents
Orbifold
Violate
Branes
clocks
Fermions
invariance
Invariance
Odd
fermions
projection
Physics
Projection
Calculate
operators
physics
Operator
Experiment

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

@article{be7c1051414f4bc3b87e834216c20281,
title = "Breaking CPT by mixed noncommutativity",
abstract = "The mixed component of the noncommutative parameter θ0 μM, where μ=0,1,2,3 and M is an extra dimensional index, may violate four-dimensional CPT invariance. We calculate one- and two-loop induced couplings of θ μ5 with the four-dimensional axial vector current and with the CPT odd dim=6 operators starting from five-dimensional Yukawa and U(1) theories. The resulting bounds from clock comparison experiments place a stringent constraint on θ μ5, |θ μ5| -1/25×10 11 GeV. Orbifold projection and/or localization of fermions on a 3-brane lead to CPT-conserving physics, in which case the constraints on θ μ5 are softened.",
author = "Irina Mocioiu and Maxim Pospelov and Radu Roiban",
year = "2002",
month = "12",
day = "1",
doi = "10.1103/PhysRevD.65.107702",
language = "English (US)",
volume = "65",
journal = "Physical Review D",
issn = "0556-2821",
number = "10",

}

Breaking CPT by mixed noncommutativity. / Mocioiu, Irina; Pospelov, Maxim; Roiban, Radu.

In: Physical Review D, Vol. 65, No. 10, 107702, 01.12.2002.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Breaking CPT by mixed noncommutativity

AU - Mocioiu, Irina

AU - Pospelov, Maxim

AU - Roiban, Radu

PY - 2002/12/1

Y1 - 2002/12/1

N2 - The mixed component of the noncommutative parameter θ0 μM, where μ=0,1,2,3 and M is an extra dimensional index, may violate four-dimensional CPT invariance. We calculate one- and two-loop induced couplings of θ μ5 with the four-dimensional axial vector current and with the CPT odd dim=6 operators starting from five-dimensional Yukawa and U(1) theories. The resulting bounds from clock comparison experiments place a stringent constraint on θ μ5, |θ μ5| -1/25×10 11 GeV. Orbifold projection and/or localization of fermions on a 3-brane lead to CPT-conserving physics, in which case the constraints on θ μ5 are softened.

AB - The mixed component of the noncommutative parameter θ0 μM, where μ=0,1,2,3 and M is an extra dimensional index, may violate four-dimensional CPT invariance. We calculate one- and two-loop induced couplings of θ μ5 with the four-dimensional axial vector current and with the CPT odd dim=6 operators starting from five-dimensional Yukawa and U(1) theories. The resulting bounds from clock comparison experiments place a stringent constraint on θ μ5, |θ μ5| -1/25×10 11 GeV. Orbifold projection and/or localization of fermions on a 3-brane lead to CPT-conserving physics, in which case the constraints on θ μ5 are softened.

UR - http://www.scopus.com/inward/record.url?scp=0037053205&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037053205&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.65.107702

DO - 10.1103/PhysRevD.65.107702

M3 - Article

AN - SCOPUS:0037053205

VL - 65

JO - Physical Review D

JF - Physical Review D

SN - 0556-2821

IS - 10

M1 - 107702

ER -