17526644
GLSMs for non-Kähler geometries
A bstractWe identify a simple mechanism by which H-flux satisfying the modified Bianchi identity arises in garden-variety (0, 2) gauged linear sigma models. Taking suitable limits leads to effective gauged linear sigma models with Green-Schwarz anomaly cancellation. We test the quantum-consistency of a class of such effective theories by constructing an off-shell superconformal algebra, identifying unexpected topological constraints on the existence of this algebra and providing evidence that these models run to good CFTs in the deep IR when all of the constraints are satisfied.
55734650
Critical Exponents for Supercooled Liquids
We compute critical exponents governing universal features of supercooled liquids through the effective theory of an overlap field. The correlation length diverges with the Ising exponent; the size of dynamically heterogeneous patches grows more rapidly; and the relaxation time obeys a generalized Vogel-Fulcher-Tammann relation.
116536256
Two-body B meson decays to eta and eta-prime Observation of B ---> eta-prime K
39782874
Stellar Variability of the Exoplanet Hosting Star HD 63454
Of the hundreds of exoplanets discovered using the radial velocity (RV) technique, many are orbiting close to their host stars with periods less than 10 days. One of these, HD 63454, is a young active K dwarf which hosts a Jovian planet in a 2.82 day period orbit. The planet has a 14% transit probability and a predicted transit depth of 1.2%. Here we provide a re-analysis of the RV data to produce an accurate transit ephemeris. We further analyze 8 nights of time series data to search for stellar activity both intrinsic to the star and induced by possible interactions of the exoplanet with the stellar magnetospheres. We establish the photometric stability of the star at the 3 mmag level despite strong Ca II emission in the spectrum. Finally, we rule out photometric signatures of both star-planet magnetosphere interactions and planetary transit signatures. From this we are able to place constraints on both the orbital and physical properties of the planet.
15138730
Reconstructing the Higgs boson in dileptonic W decays at hadron colliders
We examine the prospect to measure the Higgs boson mass using the recently introduced kinematic variable, the ${M}_{T2}$-assisted on-shell (MAOS) momentum, that provides a systematic approximation to the invisible neutrino momenta in dileptonic decays of a $W$-boson pair. For this purpose, we introduce a modified version of the MAOS momentum that is applicable even when one or both of the $W$-bosons from the Higgs decay are in off shell. It is demonstrated that the MAOS Higgs mass distribution, constructed with the MAOS neutrino momenta, shows a clear peak at the true Higgs boson mass when an event cut selecting higher value of ${M}_{T2}$ is employed. We perform the likelihood analysis for this MAOS mass distribution to determine the Higgs boson mass, and find it can improve the accuracy of the Higgs mass measurement. Our results indicate that the MAOS Higgs mass can also be useful for the discovery or exclusion of the Higgs boson in certain mass range.
5280546
Constraints on R parity and B violating couplings in gauge-mediated supersymmetry breaking models
Abstract We consider the proton decay involving a light gravitino or axino in gauge-mediated supersymmetry breaking models to derive constraints on the R parity and baryon number violating Yukawa couplings. Bounds on all nine coupling constants are obtained by considering the decay amplitudes at one-loop order.
18441360
Complete analysis of photino-mediated lepton flavor violations in generalized supersymmetric models
We consider lepton flavor violations (LFV) mediated by a photino as a result of the nondiagonal slepton mass matrices in general supersymmetric models. Using the experimental upper bounds on $\stackrel{\ensuremath{\rightarrow}}{l}{l}^{\ensuremath{'}}+\ensuremath{\gamma}$ and ${\ensuremath{\mu}}^{\ensuremath{-}}+\mathrm{Ti}\ensuremath{\rightarrow}{e}^{\ensuremath{-}}+\mathrm{Ti}$ as constraints on the flavor changing slepton mass insertions, we predict the possible ranges of the upper limits on the branching ratios of other LFV processes such as $\stackrel{\ensuremath{\rightarrow}}{l}{3l}^{\ensuremath{'}}, \stackrel{\ensuremath{\rightarrow}}{\ensuremath{\tau}}{l}_{i\ensuremath{\ne}3}+{\ensuremath{\pi}}^{0}(or \ensuremath{\eta},{\ensuremath{\rho}}^{0},\ensuremath{\varphi}), {Z}^{0}\ensuremath{\rightarrow}{l}_{i}{l}_{j\ensuremath{\ne}i},$ and muonium $\ensuremath{\rightarrow}$ antimuonium conversion. Most of these decays are expected to occur with small branching ratios far below the current or future experimental search limits. We also derive constraints on the flavor conserving mass insertions from the anomalous magnetic moments of the leptons.