Conveners
Quark & Lepton Flavor
- Bertrand Echenard (California Institute of Technology (US))
- Brian Beckford (University of Michigan)
- Wolfgang Altmannshofer (UC Santa Cruz)
- J Michael Williams (Massachusetts Inst. of Technology (US))
Quark & Lepton Flavor
- Brian Beckford (University of Michigan)
- Bertrand Echenard (California Institute of Technology (US))
- J Michael Williams (Massachusetts Inst. of Technology (US))
- Wolfgang Altmannshofer (UC Santa Cruz)
Quark & Lepton Flavor
- Brian Beckford (University of Michigan)
- J Michael Williams (Massachusetts Inst. of Technology (US))
- Bertrand Echenard (California Institute of Technology (US))
- Wolfgang Altmannshofer (UC Santa Cruz)
Quark & Lepton Flavor
- J Michael Williams (Massachusetts Inst. of Technology (US))
- Bertrand Echenard (California Institute of Technology (US))
- Brian Beckford (University of Michigan)
- Wolfgang Altmannshofer (UC Santa Cruz)
Quark & Lepton Flavor
- Wolfgang Altmannshofer (UC Santa Cruz)
- Bertrand Echenard (California Institute of Technology (US))
- J Michael Williams (Massachusetts Inst. of Technology (US))
- Brian Beckford (University of Michigan)
Quark & Lepton Flavor
- J Michael Williams (Massachusetts Inst. of Technology (US))
- Bertrand Echenard (California Institute of Technology (US))
- Brian Beckford (University of Michigan)
- Wolfgang Altmannshofer (UC Santa Cruz)
Description
parallel sessions
I will discuss models with hidden sectors that can be probed with flavor.
Searches for the proposed dark sector analogs of the photon and the Higgs boson at the LHCb experiment will be presented. LHCb has world-leading sensitivity to both hypothetical particles in some mass regions. Planned future upgrades and the resulting physics prospects will also be discussed.
The KOTO experiment was designed to observe and study the K$^{0}_{L} \rightarrow \pi^{0}\nu\bar{\nu$ decay at J-PARC. The Standard Model (SM) prediction for the process is (3.0$\pm$ 0.3) x 10$^{-11}$ with small uncertainties [1]. This unique \emph{golden} decay is an ideal candidate to probe for new physics and can place strict constraints on beyond the standard model (BSM) theories. The...
The KOTO experiment at the J-PARC research facility in Tokai, Japan aims to observe and measure the rare decay of the neutral kaon, $K_L^0 \rightarrow \pi^0 \nu \bar{\nu}$. This decay has a Standard Model (SM) predicted branching ratio (BR) of $(3.00 \pm 0.30) \times 10^{-11}$ [1]. While this decay is extremely rare, it is one of the best decays in the quark sector to probe for new physics...
In this talk we show how $\tau$ decays offer an interesting possibility to discriminate between different operators contributing to lepton flavor violation
discussed within an effective field theory framework. Recent developments in the determination of the hadronic matrix elements needed to consider semileptonic decays are reviewed. We also discuss the complementarity with other probes such...
The tiniest upper limit of any particle's branching ratio was established in 2016 by the MEG experiment on the lepton-flavor-violating muon decay, $\mu \to e \gamma$. To further explore the existence of the decay with an order of magnitude higher sensitivity, the detectors have been upgraded. The new experiment, MEG II, is going to start data-taking in 2020 at the Paul Scherrer Institute in...
The primary physics goal of the Mu2e Experiment is to search for Charged Lepton Flavor Violation (CLFV) in the process of a coherent neutrinoless $\mu^{-} N \rightarrow e^{-} N$ transition. This process is allowed under the Standard Model however at unobservable rates. Observation of this process would therefore be an unambiguous indication of new physics. The Mu2e goal is to improve on the...
We will investigate an alternative Mu2e-II production scheme based on general knowledge of muon-collider and neutrino-factory front ends, and specific knowledge developed on previous Muons, Inc. SBIR/STTR projects. Bright muon beams generated from sources designed for muon collider and neutrino factory facilities have been shown to generate two orders of magnitude more muons per proton than...
The Fermilab Muon g-2 experiment will measure the anomalous magnetic moment of the muon to a precision of 140 parts per billion, which is a factor of four improvement over the previous E821 measurement at Brookhaven. The experiment will also extend the search for the muon’s electric dipole moment (EDM) by approximately two orders of magnitude with a sensitivity down to 10e-21 e.cm. Both of...
The Muon $g-2$ experiment at Fermilab is set to provide the most precise measurement of the anomalous magnetic moment of the muon. There is currently a 3+ $\sigma$ tension between the experimental value and Standard Model theory, making this a promising way to look for evidence of beyond the standard model physics. The hadronic vacuum polarization (HVP) contribution to muon $g-2$ is the...
We discuss the implications of the recent discovery of CP violation in charm decays at LHCb. Furthermore, we show in which modes to search for charm CP violation next and present U-spin sum rules for CP asymmetries of charmed baryon decays.
BESIII has collected data samples corresponding to luminosities of 2.93 fb-1, 3.19 fb-1 and 0.567 fb-1 at center-of-mass energies of 3.773, 4.178, and 4.6 GeV, respectively. The data set collected at 3.773 GeV contains quantum-correlated D0D0bar pairs that provide access to strong-phase differences between amplitudes. We report the measurements of strong phase differences for D0(-bar) -> K_S/L...
BESIII has collected data samples corresponding to luminosities of 2.93 fb-1 and 3.19 fb-1 at center-of-mass energies of 3.773 and 4.178, respectively. Based on these, we report measurements of the decays D(s)+ -> l+v (l=mu, tau), D0(+) -> K-bar(pi)l+v (l=e,mu), D0(+) -> K-bar(pi)pie+v, D0(+) -> a0(980)e+v, Ds+ -> eta(')e+v and Ds+ -> K(*)0e+v. From these analyses, precise determinations of...
Copious numbers of charmed baryons are produced by the LHC. These are detected in various decay modes using the LHCb detector. We report on some unique decays that give incite into weak decay mechanisms. We also contrast with beauty baryon decays in some instances.
Decays of $b$ hadrons provide a powerful probe for new physics effects that may violate the Standard Model's paradigm of Lepton Flavor Universality, whereby the three charged lepton flavors are distinguished only by their differing masses. A definitive observation of a deviation from the predictions of LFU would provide unambiguous evidence of new physics. A recent history of results showing...
We present a state-of-the-art picture of the imprints of New Physics in $b \to s \ell^{+} \ell^{−}$ transitions in light of the most recent experimental updates on lepton-universality tests of the Standard Model in this channel from the LHCb and Belle collaborations. We make use of the language of effective field theories in order to characterize a model-independent study of New Physics...
The rare inclusive decay $\bar{B}\rightarrow X_s\gamma$ is an important probe of physics beyond the standard model. The largest uncertainty on the decay rate and CP asymmetry comes from resolved photon contributions. They first appear at order $1/m_b$ in the heavy quark expansion and arise from operators other than $Q_{7\gamma}$. One of the three leading contributions in the heavy quark...
This talk will report recent results from ongoing lattice-QCD calculations of semileptonic decays from the Fermilab Lattice and MILC collaborations. The focus of the talk will be on heavy-to-light decays (D/B to K/$\pi$). These calculations play an essential role in determining CKM matrix elements (in particular, $|V_{us}|$, $|V_{cd}|$, and $|V_{ub}|$). They are also important for constraining...
The beauty-quark is one of the kinematically accessible heavy-quark at HERA. Measurements of open $b$-quark production in deep inelastic scattering (DIS) of ${e^\pm}p$ at HERA provide important test of perturbative Quantum Chromo Dynamics (pQCD) theory within the Standard Model and is used to constrain proton parton distribution functions (PDFs). In this contribution we attempt to determine...
Semileptonic $b$-hadron decays provide a laboratory to measure the CKM matrix element $|Vcb|$, as well as test lepton flavor universality violation (LFUV) via the $R(D^{(*)})$ ratios. Measurements of the former exhibit low values that are in tension with inclusive $|V_{cb}|$ measurements, while persistent LFUV signals are observed above the 3 sigma level. This talk provides a survey of recent...
B physics is in an exciting era. The LHCb and Belle II experiments are reaching unprecedented precision and are providing new opportunities for discovering physics beyond the Standard Model. To connect the hadronic processes observed in the experiments to the underlying short-distance physics, lattice QCD calculations are essential. I will discuss recent progress and future prospects for B...
The Belle II experiment has begun its main physics running with a fully instrumented detector in Tsukuba, Japan. With the SuperKEKB asymmetric-energy e$^+$e$^-$ collider producing collisions with an ultimate design luminosity of 8 $\times 10^{35}\,$cm$^{-2}\,$s$^{-1}$ and a planned $50\,$ab$^{-1}$ data set, the Belle II/SuperKEKB facility is poised to become the world's first Super B Factory....
Since 2010, the LHCb experiment at CERN has been accumulating 1-2 $fb^{-1}$ of 7-13 TeV pp collision data every year. This b- and c-hadron rich data sample, together with the detector’s excellent performance, has allowed LHCb to carry out world leading measurements in the field of flavor physics. Many of these results, however, will benefit from significantly larger data samples, and that is...
A key part of the LHCb charged particle tracking system is the silicon detector (UT) placed after the VErtex LOcator and before the dipole magnet. Its main function is to make a quick measurement on the momentum of tracks using the small magnetic field between the VELO and the UT. The fully software trigger is consequently sped up by a factor of three. Also of prime importance is the rejection...
The recent discovery of several narrow pentaquark states by the LHCb experiment will be presented.
Doubly heavy baryons $\left(QQq\right)$ and singly heavy antimesons $\left(\bar{Q}q\right)$ are related by the heavy quark-diquark (HQDQ) symmetry because in the $m_Q \to \infty$ limit, the light degrees of freedom in both the hadrons are expected to be in identical configurations. Hyperfine splittings of the ground states in both systems are nonvanishing at $O(1/m_Q)$ in the heavy quark mass...
The decays of the /\b baryon constitute important sources of information for different aspects of weak interactions. /\b baryons are produced prolifically at the LHC, with their production ratio with respect to light B mesons decreasing rapidly with transverse momentum. These /\b's have been analyzed by the LHCb collaboration in order to measure form-factors in /\b->/\c mu- nu transitions,...
We revisit the non-relativistic effective field theory called XEFT that is specifically designed for the description of X(3872) which is one of the most interesting candidates for hadronic molecules. In the framework XEFT, X(3872) is described as a bound state of two D mesons. Two new interaction terms consistent with general power counting rules are introduced to study the interaction of...
We selected candidate events for production of the exotic charged charmonium-like states $Z_c^{\pm}(3900)$ decaying to $ J/\psi\pi^{\pm}$ and $X(3872)$ decaying to $J/\psi\pi^{\pm}\pi^{\mp}$. We use 10.4 $\rm fb^{−1}$ of $p\bar p$ collisions recorded by the D0 experiment at the Tevatron collider at $\sqrt s=$1.96 TeV. We measure the $Z_c$ mass and natural width using subsample of...
High-energy heavy ion collisions result in a deconfined phase transition where instead of ordinary nuclear matter in form protons and neutrons one can study the strongly coupled quark-gluon plasma (QGP). In peripheral heavy ion collisions, the presence of the strong magnetic fields and the chiral anomaly is predicted to induce an electric current which induces a charge separation along the...
