About this Research Topic
The last triumphant achievement in the particle experiments was the discovery of the Higgs boson at the Large Hadron Collider (LHC) in 2012. While this discovery completes the particle spectrum of the Standard Model (SM), there remain some theoretical questions (like the gauge hierarchy problem, fermion mass hierarchy, strong CP problem etc.) unanswered and experimental observations (like dark matter, dark energy, matter-antimatter asymmetry, neutrino mass etc.) unexplained. These motivate us to build theories beyond the Standard Model (BSM) with high-scale validity whose low-energy effective versions must correspond to the SM. The signatures of these BSM theories, if they exist at the TeV scale, would show up either directly as new resonances or indirectly as deviations from the SM predictions of some observables.
Searches for new physics (NP) are continuously being carried out at particle collider experiments directly as new resonances or indirectly as deviations from the SM predictions in various low-energy flavor observables. During the past few years, several persistent disagreements with the SM predictions observed in different experiments. Some anomalies in the rare B-meson decays have been reported by the BaBar, LHCb, and Belle collaborations. The anomalous magnetic moment of muon is persisted for two decades. There are also some interesting anomalies observed in neutrino experiments. These anomalies, if not just statistical flukes or our lack of understanding of nonperturbative effects, strongly hint towards the existence of NP.
This research topic aims to understand whether these anomalies are really the effect of new physics or not, what kind of BSM theories can accommodate these anomalies, how one can construct new phenomenological models to address them, what kind of new signatures these model can produce that can be tested at the Large Hadron Colliders or in other experiments etc. Since, there is growing interest in understanding various anomalies observed in different experiments, the research topic is timely and the scope of this topic is broad, with the aim that this state-of-the-art collection will help us to answer some discrepancies of the SM in future. We invite the authors to submit original articles as well review articles related to the topic.
Keywords: Anomalies in experiments, Flavor anomalies, Anomalous magnetic moment of muon, Beyond the Standard Model
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