Phenomenology 2019 Symposium

Session

Flavor I

21

7 May 2019, 14:00

207 (Lawrence Hall)

Conveners

Flavor I

• Alexey Petrov (Wayne State University)

789. ATLAS measurements of Rare decays and CP Violation in Beauty mesons

Weimin Song

07/05/2019, 14:00

The ATLAS experiment has performed accurate measurements of mixing and CP violation in the neutral B mesons, and also of rare processes happening in electroweak FCNC-suppressed neutral B-mesons decays.
This talk will focus on the latest results from ATLAS, such as rare processes: B^0_s → mu mu and B^0 → mu mu, and CPV in Bs to J/psi phi.

739. Asymmetry Observables and the Origin of $R_{D^{(*)}}$ Anomalies

Pouya Asadi (Rutgers University)

07/05/2019, 14:15

parallel talk

The $R_{D^{(*)}}$ anomalies are among the longest-standing and most statistically significant hints of physics beyond the Standard Model. In this talk, we investigate future measurements at Belle II that can be used to tell apart the various new physics scenarios for these anomalies. We show that Belle II can use a number of $\tau$ asymmetry observables (forward-backward asymmetry and...

746. A complete vector-like fourth family model for muon anomalies

Dr Junichiro Kawamura (Keio University)

07/05/2019, 14:30

parallel talk

The Standard Model (SM) is extended by introducing a complete vector-like fourth familyand a vector-like U(1)' gauge symmetry.This model can explain experimental values of the muon anomalous magnetic moment and anomalies for $b \to s \mu^+ \mu^-$ processes simultaneously without conflicting with the other observations, e.g. lepton flavor violating processes, CKM matrix, neutral meson mixings...

787. Minimal SU(4) models and B-meson anomalies

Matej Hudec (Charles University, Prague)

07/05/2019, 14:45

parallel talk

It has been identified decades ago that the minimal potentially realistic model with the quark-lepton symmetry has the SU(4)xSU(2)xU(1) gauge structure and naturally contains both gauge and scalar leptoquarks. The model has been thoroughly studied by several authors.

We will comment on the capability of this model to accommodate the anomalous B-meson decay data. In particular, we will argue...

669. Correlation between $R_{D^{(*)}}$ and top quark FCNC decays in leptoquark models

Peiwen Wu (Korea Institute for Advanced Study (KIAS))

07/05/2019, 15:00

parallel talk

Some interpretations of $R_{D^{(*)}}$ anomaly in $B$ meson decay using leptoquark models can also generate top quark decays through flavor changing neutral current (FCNC). In this work we focus on two leptoquarks, i.e. scalar $S_1$ and vector $U_1$ which are both singlet under the $SU(2)_L$ gauge group in the Standard Model (SM). We investigate their implications on top FCNC decays $t\to c...

777. Anomaly-free Froggatt-Nielsen models of flavor

Michele Tammaro (University of Cincinnati)

07/05/2019, 15:15

parallel talk

We present an anomaly-free Froggatt-Nielsen (FN) model to generate the fermion mass hierarchy and mixing based on a new horizontal gauge group. We explore two choices for this new group and the associated phenomenology.

794. Up-Sector Flavor Violating Models at the LHC

Wen Han Chiu (University of Chicago)

07/05/2019, 15:30

parallel talk

We explored flavor universality violating models by studying dimension-six effective operators which modify the coupling between the first generation up-quarks, Higgs boson and $Z$ boson. Through the use of simulated boosted Higgs strahlung events at both the HL-LHC and HE-LHC, as well as existing ATLAS data for background estimates, projected constraints on the scale of new physics as...

674. The Spontaneous Flavor Violating 2HDM

Samuel Homiller (YITP, Stony Brook)

07/05/2019, 15:45

parallel talk

Strong constraints on flavor-changing neutral currents (FCNCs) naively imply that flavorful new physics must be at scales far beyond the reach of the LHC or future colliders. Assuming the new physics is flavor blind or has a Standard Model-like structure avoids these bounds but severely limits the potential phenomenology. In contrast, we present an alternative flavorful Ansatz for beyond the...