Conveners
Flavour Physics
- Phillip Urquijo (University of Melbourne (AU))
Flavour Physics
- German Valencia (Monash University)
Flavour Physics
- Xiao-Gang He
Flavour Physics
- George Wei-Shu Hou (National Taiwan University (TW))
Flavour changing neutral current processes, such as B -> K(*)l+l- where l = e+, mu+, tau+ are highly
suppressed in the Standard Model (SM). These rare decays occur at lowest order via 1-loop diagrams, and contributions from virtual particles in the loop allow one to probe large mass scales at relatively low energies. We present here the most recent results based on the full BABAR data...
Radiative b-hadron decays are sensitive probes of New Physics through the study of branching fractions, CP asymmetries and measurements of the polarisation of the photon emitted in the decay. During Run 1 of the LHC, the LHCb experiment has collected large samples of radiative b-hadron decays. We present here the latest LHCb measurements, including new results on the time dependence of $B_s...
SUSY-related lepton and hadron flavour results from Belle
Rare leptonic and semileptonic decays of B, D and K mesons provide sensitive indirect probes of effects beyond the Standard Model (SM). In the SM, these decays are forbidden at tree level and are therefore suppressed. In particular, the $b \to s \ell^+ \ell^-$ processes give access to many observables where effects of New Physics can be observed. The LHCb experiment is designed for these...
ATLAS has a wide programme of activities in B-physics. The results of studies in the electro-weak sector and beyond SM searches will be discussed, including CP violation and mixing in the B0_s and B0 systems, rare decay of B0_(s) to muon pairs, and angular correlations in the decay of B0 to K*0 mu+mu-.
The available statistics of heavy flavored particles collected at the LHC in pp collisions at 7, 8 and 13 TeV provides an excellent opportunity to test the standard model and probe for New Physics. A review of selected recent measurements on heavy flavors by CMS based ...
K+->pi+nunu is one of the theoretically cleanest meson decay where to look for indirect effects of new physics complementary to LHC searches. The NA62 experiment at CERN SPS is designed to measure the branching ratio of this decay with 10% precision. NA62 took data in pilot runs in 2014 and 2015 reaching the final designed beam intensity. The quality of data acquired in view of the final...
The MEG experiment, which searches for a lepton flavor violating muon decay, $\mu^{+} \rightarrow e^{+} \gamma$, to explore new physics like SUSY-GUT, started physics data taking in 2008 at Paul Scherrer Institute in Switzerland, and finished it in 2013. Its innovative detector system enabled orders of magnitude better sensitivity than previous experiments. The analysis result of the full...
The same leptoquarks that explain the recently observed anomalies in rare B meson decays can generate naturally small Majorana neutrino masses at one-loop level through mixing with the standard model Higgs boson. We explore flavour model realisations with at least two leptoquark mediators to address these unresolved phenomena of the SM.
If the Left-Right Symmetric Model (LRM) realized at the TeV scale provides the correct
explanation of the diboson excess observed at the 8 TeV LHC by ATLAS and CMS, then there
are numerous implications for physics at lower energy scales involving many aspects of the
leptonic sector. These include lepton number-violating processes such as $\beta \beta_{0\nu}$, lepton flavor-violating (LFV)...
A general two Higgs doublet model (2HDM) is adopted to study the signature of
flavor changing neutral Higgs (FCNH) decay
$\phi^0 \to t\bar{c}+\bar{t}c$, where
$\phi^0$ could be a CP-even scalar ($H^0$) or a CP-odd pseudoscalar ($A^0$)
as well as $t \to c h^0$.
Measurement of the light 125 GeV neutral Higgs boson ($h^0$) couplings at the
Large Hadron Collider (LHC) favor the decoupling limit...
Precision experiments usually lead to the best limits on lepton flavour violating operators. However in light of the new possibilities at the LHC, one might wonder, how its capability to test lepton flavour violating processes compares to precision experiments.
I will present a sensitivity study of the LHC to lepton flavour violating operators of dimension 6 with two same flavour quarks and...
The studies performed by ATLAS in the sector of flavour physics in the high-pT range will be discussed, including FCNC in top decays involving coupling to gamma, Z, and Higgs, single top production, and lepton-flavour violation in Higgs decays.
The Standard Model predicts, with small uncertainties, the ratios of branching fractions of rare decays involving different lepton flavours to be unity up to lepton mass corrections. The universality of lepton couplings has been tested using the LHCb run 1 dataset, resulting in some tensions with the predicted values. Lepton non-universality would be a major departure from the Standard Model...
The Daya Bay Experiment has been measuring reactor antineutrino disappearance on short baseline with unprecedented precision since 2011. It was the first experiment which in 2012 observed a non-zero value of mixing angle $\theta_{13}$. Experiment benefits from the large statistics, precise knowledge of background and unique layout with 8 functionally identical antineutrino detectors deployed...
I will discuss the relation between QFT amplitudes calculated in the "interaction" basis and "mass eigenstate" basis, especially important for flavor physics. I will present and prove a theorem in matrix analysis allowing to algebraically translate an amplitude written in mass eigenbasis into flavor mass insertions, without performing diagrammatic calculations in the interaction basis. The...
We investigate the impact of a light sterile neutrino (∼ eV) on the prospective data expected
from currently running long-baseline experiments T2K and NOνA. If the future short baseline
experiments confirm the existence of an eV scale sterile neutrino, then the 3+1 scheme will
modify the mass hierarchy and CP-violation searches of the 3 active neutrino scenario in
these two experiments...
We analyze charmless two-body non-leptonic B decays $B \to PP, PV$ under the framework of factorization assisted topological amplitude approach, where $P(V)$ denotes a light pseudoscalar (vector) meson. Compared with the conventional flavor diagram approach, we consider flavor $SU(3)$ breaking effect assisted by factorization hypothesis for topological diagram amplitudes of different decay...
We study the $B_s \to \pi^+ \pi^-$ and $B_d \to K^+ K^-$ decays in the standard model and the family non-universal $Z^\prime$ model. Since none of the quarks in final states is the same as the initial quark, these decay modes can occur only via power-suppressed annihilation diagrams. Despite the consistence of the standard model prediction with the available data, there is a surviving room for...
The supersymmetric grand unified theories (SUSY GUTs) are the promising models beyond the standard model for particle physics.
The standard SUSY GUTs predict that there exist the baryon-number violating processes, such as proton decay.
It is important to estimate quantum corrections on these processes in order to predict precise nucleon lifetime since there exists a large scale running...
The Cryogenic Underground Observatory for Rare Events (CUORE)
is a 1-ton scale double beta decay experiment based on cryogenic bolometers currently
in its final stages of construction at the Gran Sasso National Laboratory (LNGS).
The detector consists of an array of 988 TeO$_2$ crystals arranged in a cylindrical compact structure of 19 towers.
Its primary goal is to search for...
