The LHC physics era is about to commence; here we discuss a complementary physics program that would be realized at a high luminosity flavor factory. A flavor factory experiment can search for new physics in CP asymmetries, inclusive decay processes, rare leptonic processes, absolute branching fractions, and other measurements that are challenging or not feasible at the LHC. Such measurements would provide good sensitivity to new physics phases, the presence of a charged Higgs, and supersymmetric couplings. The charged Higgs mass range probed is similar to that accessible at the LHC.
The LHC has not discovered any New Physics beyond the anticipated $h(125)$ boson, and new ideas abound for out-of-the-box searches, or Effective Field Theories with multi-TeV cutoff. But, have we exhausted dimension-4 operators involving sub-TeV particles that are {\it not} exotic (non-XLP)? We advocate the existence of an extra Higgs doublet that carry extra Weinberg couplings, where {\it emergent} mass-mixing hierarchies {\it and} alignment have hidden their effects very well so far. ${\cal O}(1)$ Higgs quartics can induce first order electroweak phase transition and imply sub-TeV $H, A, H^\…
We examine the low-energy signatures of axion-like particles (ALPs) in lepton flavor violating (LFV) processes. By using a dimension-5 effective Lagrangian, we compute the most general ALP contributions to LFV decays of leptons and mesons. The provided expressions are valid for any choice of ALP mass and couplings. We explore the complementarity of different processes, identifying specific patterns to be experimentally tested. Constraints on LFV couplings are derived from existing data and prospects for forthcoming experiments are also discussed. As a by-product, we revisit the possibility of …
随着在$Υ(4S)$共振运行的非对称$e^+ e^-$对撞机（“B工厂”）上进行的第一代实验接近完成，一个高光度机器的新时代即将到来。我们在这里报告的计划，在KEK在日本的升级KEKB机（“SuperKEKB”）的目标是实现瞬时亮度超过$8 \times 10^{35}$ cm $^{-2}$ s $^{-1}$，这几乎是两个数量级高于KEKB。与机器一起，Belle探测器也将升级（“Belle-II”），并进行重大改进，以提高其背景容限并改善其物理性能。新一代实验计划于2013年获得第一批数据。
Starting from a general effective Lagrangian for lepton flavor violation (LFV) in quark-lepton transitions, we derive constraints on the effective coefficients from the high-mass tails of the dilepton processes $pp \to \ell_k \ell_l$ (with $k\neq l$). The current (projected) limits derived in this paper from LHC data with $36~\mathrm{fb}^{-1}$ ($3~\mathrm{ab}^{-1}$) can be applied to generic new physics scenarios, including the ones with scalar, vector and tensor effective operators. For purely left-handed operators, we explicitly compare these LHC constraints with the ones derived from flavor…
Exploring $Z/γ$-mediated heavy FCNCs at the FCC-ee
Indian Institute of Technology Guwahati（印度理工学院古瓦哈提分校）；Shanghai Institute for Advanced Studies（上海高等研究院）；University of Science and Technology of China（中国科学技术大学）
A modest extension of the Standard Model by two additional Higgs doublets - the Higgs Troika Model - can provide a well-motivated scenario for successful baryogenesis if neutrinos are Dirac fermions. Adapting the "Spontaneous Flavor Violation" framework, we consider a version of the Troika model where light quarks have significant couplings to the new multi-TeV Higgs states. Resonant production of new scalars leading to di-jet or top-pair signals are typical predictions of this setup. The initial and final state quarks relevant to the collider phenomenology also play a key role in baryogenesis…
The Deep Underground Neutrino Experiment -- DUNE: the precision era of neutrino physics
过去的十年对中微子物理学来说意义非凡。特别是，中微子味振荡现象已通过一系列独立测量牢固确立。中微子混合的所有参数现在都是已知的，我们有必要计划对这些最新进展所开启的新场景进行明智的探索。通过精确的测量，我们可以检验轻子扇区中的3-中微子范式、中微子质量等级和CP不对称性。未来的长基线实验被认为是加深我们对电弱相互作用认识的基本工具。深地下中微子实验- DUNE将在一个地下的大质量液氩时间投影室中探测来自费米实验室的宽带中微子束，其L/E约为$10^3$ km / GeV，以达到CP相测量和确定质量等级的良好灵敏度。远探测器的尺寸和深度也创造了一个很好的机会来寻找罕见的信号，如质子衰变，以研究重子数的破坏，以及超新星中微子爆发，将实验范围扩大到天体物理学和宇宙学中的相关影响。在本报告中，我们将讨论物理动机和DUNE项目的主要实验特征，以实现其科学目标。
