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On the energy-momentum tensor in Moyal space

Journal Article · · European Physical Journal. C, Particles and Fields
 [1];  [2];  [3];  [1]
  1. Vienna Univ. of Technology (Austria). Inst. of Theoretical Physics
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theory Division
  3. Inst. de Physique Nucleaire de Lyon (IPNL), Villeurbanne (France)
We study the properties of the energy-momentum tensor of gauge fields coupled to matter in non-commutative (Moyal) space. In general, the non-commutativity affects the usual conservation law of the tensor as well as its transformation properties (gauge covariance instead of gauge invariance). It is known that the conservation of the energy-momentum tensor can be achieved by a redefinition involving another starproduct. Furthermore, for a pure gauge theory it is always possible to define a gauge invariant energy-momentum tensor by means of a Wilson line. We show that the latter two procedures are incompatible with each other if couplings of gauge fields to matter fields (scalars or fermions) are considered: The gauge invariant tensor (constructed via Wilson line) does not allow for a redefinition assuring its conservation, and vice-versa the introduction of another star-product does not allow for gauge invariance by means of a Wilson line.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1221372
Alternate ID(s):
OSTI ID: 22387236
Report Number(s):
LA-UR--15-21030; PII: 3492
Journal Information:
European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Journal Issue: 6 Vol. 75; ISSN 1434-6044
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Energy momentum tensor for translation invariant renormalizable noncommutative field theory journal December 2018
Aspects of perturbative quantum field theory on non-commutative spaces conference November 2016
Field Theory with Coordinate Dependent Noncommutativity journal December 2018

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