Please use this identifier to cite or link to this item:
|Title:||Model-independent Constraints on ΔF=2 Operators and the Scale of New Physics||Authors:||UTfit Collaboration
|Keywords:||Beyond Standard Model
Heavy Quark Physics
|Issue Date:||Mar-2008||Abstract:||We update the constraints on new-physics contributions to ΔF = 2 processes from the generalized unitarity triangle analysis, including the most recent experimental developments. Based on these constraints, we derive upper bounds on the coefficients of the most general ΔF = 2 effective Hamiltonian. These upper bounds can be translated into lower bounds on the scale of new physics that contributes to these low-energy effective interactions. We point out that, due to the enhancement in the renormalization group evolution and in the matrix elements, the coefficients of non-standard operators are much more constrained than the coefficient of the operator present in the Standard Model. Therefore, the scale of new physics in models that generate new ΔF = 2 operators, such as next-to-minimal flavour violation, has to be much higher than the scale of minimal flavour violation, and it most probably lies beyond the reach of direct searches at the LHC.||URI:||http://hdl.handle.net/2307/386||DOI:||10.1088/1126-6708/2008/03/049|
|Appears in Collections:||A - Articolo su rivista|
X_Dipartimento di Fisica 'Edoardo Amaldi'
Show full item record Recommend this item
Files in This Item:
|File||Description||Size||Format||Existing users please Login|
|58_jhep03(2008)049.pdf||688.15 kB||Adobe PDF||Request a copy|
checked on Aug 4, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.