Towards the identification of new physics through quark flavour violating processes

被引：69
作者：
Buras, Andrzej J. [1 ]
Girrbach, Jennifer
机构：
[1] TUM IAS, Lichtenbergstr 2a, D-85748 Garching, Germany
来源：
REPORTS ON PROGRESS IN PHYSICS | 2014年 / 77卷 / 08期
关键词：
flavour; particle physics; quark flavour violation; ELECTRIC-DIPOLE MOMENTS; DIRECT CP VIOLATION; TO-LEADING ORDER; STANDARD MODEL PREDICTION; LOW-ENERGY PROBES; QCD CORRECTIONS; BRANCHING FRACTION; DOUBLET MODELS; KAON DECAYS; RARE DECAYS;
D O I：
10.1088/0034-4885/77/8/086201
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We outline a systematic strategy that should help in this decade to identify new physics (NP) beyond the standard model (SM) by means of quark flavour violating processes, and thereby extend the picture of short distance physics down to scales as short as 10(-20) m and even shorter distance scales corresponding to energies of 100 TeV. Rather than using all of the possible flavour-violating observables that will be measured in the coming years at the LHC, SuperKEKB and in Kaon physics dedicated experiments at CERN, J-PARC and Fermilab, we concentrate on those observables that are theoretically clean and very sensitive to NP. Assuming that the data on the selected observables will be very precise, we stress the importance of correlations between these observables as well as of future precise calculations of non-perturbative parameters by means of lattice QCD simulations with dynamical fermions. Our strategy consists of twelve steps, which we will discuss in detail while illustrating the possible outcomes with the help of the SM, models with constrained minimal flavour violation (CMFV), MFV at large and models with tree-level flavour changing neutral currents mediated by neutral gauge bosons and scalars. We will also briefly summarize the status of a number of concrete models. We propose DNA charts that exhibit correlations between flavour observables in different NP scenarios. Models with new left-handed and/or right-handed currents and non-MFV interactions can be distinguished transparently in this manner. We emphasize the important role of the stringent CMFV relations between various observables as standard candles of flavour physics. The pattern of deviations from these relations may help in identifying the correct NP scenario. The success of this program will be very much facilitated through direct signals of NP at the LHC, even if the LHC will not be able to probe the physics at scales shorter than 4 x 10(-20) m. We also emphasize the importance of lepton flavour violation, electric dipole moments, and (g - 2)(e,mu) in these studies.
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页数：77
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