Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-08-05
JHEP 0602:028,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
22 pages, 2 figures, updated version contains some clarifying remarks on the nature of the studied class of models, some typos
Scientific paper
10.1088/1126-6708/2006/02/028
Restrictions imposed by gauge invariance in noncommutative spaces together with the effects of ultraviolet/infrared mixing lead to strong constraints on possible candidates for a noncommutative extension of the Standard Model. In this paper, we study a general class of 4-dimensional noncommutative models consistent with these restrictions. Specifically we consider models based upon a gauge theory with the gauge group U(N_1)\times U(N_2) \times ... \times U(N_m) coupled to matter fields transforming in the (anti)-fundamental, bi-fundamental and adjoint representations. Noncommutativity is introduced using the Weyl-Moyal star-product approach on a continuous space-time. We pay particular attention to overall trace-U(1) factors of the gauge group which are affected by the ultraviolet/infrared mixing. We show that, in general, these trace-U(1) gauge fields do not decouple sufficiently fast in the infrared, and lead to sizable Lorentz symmetry violating effects in the low-energy effective theory. Making these effects unobservable in the class of models we consider would require pushing the constraint on the noncommutativity mass scale far beyond the Planck mass (M_{NC}\gtrsim 10^{100} M_{P}) and severely limits the phenomenological prospects of such models.
Jaeckel Joerg
Khoze Valentin V.
Ringwald Andreas
No associations
LandOfFree
Telltale Traces of U(1) Fields in Noncommutative Standard Model Extensions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Telltale Traces of U(1) Fields in Noncommutative Standard Model Extensions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telltale Traces of U(1) Fields in Noncommutative Standard Model Extensions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-249007