We study the extension of the minimal supersymmetric standard model by adding one singlet and one hypercharge zero $SU(2)$ triplet chiral superfield. The triplet sector gives an additional contribution to the scalar masses, and we find that the lightest $CP$-even Higgs boson can have a mass of 119–120 GeV at tree level, and radiative correction raises the value to 125 GeV. In this model no significant contributions from stop loops is needed to get the required Higgs mass that alleviates the fine-tuning problem of fixing the stop mass to a high precision at the grand unified theory scale. In addition, this model gives a neutralino dark matter of mass around 100 GeV that is a mixture of Higgsino and triplino with a dark matter density consistent with WMAP observations. The spin-independent scattering cross section with nucleons is ${10}^{-43}{\mathrm{cm}}^2$, which makes it consistent with the bounds from direct detection experiments like XENON100 and others.

The color gauge-invariant transverse momentum dependent (TMD) quark correlators contain process dependent gauge links in the bilocal matrix elements. In this paper, we split these process dependent correlators into universal TMD correlators, which in turn can be parametrized in universal TMD distribution functions. The process dependence is contained in gluonic pole factors, of which the value is determined by the gauge link. The operator structures of the universal TMD correlators are identified using transverse moments. In this paper, specific results for double transverse weighting of quark TMDs are given. In particular, we show that for a spin $1/2$ target one has three universal time-reversal even leading “pretzelocity distributions,” two of which involve double gluonic pole matrix elements and come with process dependent gluonic pole factors. We generalize the results for single and double weighting to TMD correlators of any specific rank, illustrating it for unpolarized, spin $1/2$ and spin 1 targets.

Using $(106\pm 4)\times {10}^6$ ${\psi }^{\prime }$ events accumulated with the BESIII detector at the BEPCII $e^{+}{e}^{-}$ collider, we present measurements of the branching fractions for ${\psi }^{\prime }$ decays to $K^{+}{K}^{-}{\pi }^0$ and $K^{+}{K}^{-}\eta$. In these final states, the decay ${\psi }^{\prime }\to K_2^{*}(1430{)}^{+}{K}^{-}+\mathrm{c}.\mathrm{c}.$ is observed for the first time, and its branching fraction is measured to be $(7.12\pm 0.62(\mathrm{stat}{)}_{-0.61}^{+1.13}(\mathrm{syst}))\times {10}^{-5}$, which indicates a violation of the helicity selection rule in ${\psi }^{\prime }$ decays. The branching fractions of ${\psi }^{\prime }\to K^{*}(892{)}^{+}{K}^{-}+\mathrm{c}.\mathrm{c}.$, $\varphi \eta$, and $\varphi {\pi }^0$ are also measured. The measurements are used to test the QCD predictions on charmonium decays.

Results are presented from a search for physics beyond the standard model based on events with large missing transverse energy, at least three jets, and at least one, two, or three $b$-quark jets. The study is performed using a sample of proton-proton collision data collected at $\sqrt{s}=7\mathrm{TeV}$ with the CMS detector at the LHC in 2011. The integrated luminosity of the sample is $4.98{\mathrm{fb}}^{-1}$. The observed number of events is found to be consistent with the standard model expectation, which is evaluated using control samples in the data. The results are used to constrain cross sections for the production of supersymmetric particles decaying to $b$-quark-enriched final states in the context of simplified model spectra.

We present a measurement of the semileptonic mixing asymmetry for $B^0$ mesons, $a_{\mathrm{sl}}^d$, using two independent decay channels: $B^0\to {\mu }^{+}{D}^{-}X$, with $D^{-}\to K^{+}{\pi }^{-}{\pi }^{-}$; and $B^0\to {\mu }^{+}{D}^{*-}X$, with $D^{*-}\to {\overline{D}}^0{\pi }^{-}$, ${\overline{D}}^0\to K^{+}{\pi }^{-}$ (and charge conjugate processes). We use a data sample corresponding to $10.4{\mathrm{fb}}^{-1}$ of $p\overline{p}$ collisions at $\sqrt{s}=1.96\mathrm{TeV}$, collected with the D0 experiment at the Fermilab Tevatron collider. We extract the charge asymmetries in these two channels as a function of the visible proper decay length of the $B^0$ meson, correct for detector-related asymmetries using data-driven methods, and account for dilution from charge-symmetric processes using Monte Carlo simulation. The final measurement combines four signal visible proper decay length regions for each channel, yielding $a_{\mathrm{sl}}^d=[0.68\pm 0.45(\mathrm{stat})\pm 0.14(\mathrm{syst})]\%$. This is the single most precise measurement of this parameter, with uncertainties smaller than the current world average of $B$ factory measurements.

In ($2+1$)-dimensional hydrodynamic systems with broken parity, the shear and bulk viscosity is joined by the Hall viscosity and curl viscosity. The dual holographic model has been constructed by coupling a pseudoscalar to the gravitational Chern-Simons term in ($3+1$)-dimensional bulk gravity. In this paper, we investigate the nonrelativistic fluid with Hall viscosity and curl viscosity living on a finite radial cutoff surface in the bulk. Employing the nonrelativistic hydrodynamic expansion method, we obtain the incompressible Navier-Stokes equations with Hall viscosity and curl viscosity. Unlike the shear viscosity, the ratio of the Hall viscosity over entropy density is found to be cutoff scale dependent, and it tends to zero when the cutoff surface approaches the horizon of the background space-time.

We show that the emission of soft photons via nonlinear Compton scattering in a pulsed plane wave (laser field) is in general infrared divergent. We give examples of both soft and soft-collinear divergences, and we pay particular attention to the case of crossed fields in both classical and quantum theories.

The relation between the clustering properties of luminous matter in the form of galaxies and the underlying dark matter distribution is of fundamental importance for the interpretation of ongoing and upcoming galaxy surveys. The so-called local bias model, where galaxy density is a function of local matter density, is frequently discussed as a means to infer the matter power spectrum or correlation function from the measured galaxy correlation. However, gravitational evolution generates a term quadratic in the tidal tensor and thus nonlocal in the Eulerian density field, even if this term is absent in the initial conditions (Lagrangian space). Because the term is quadratic, it contributes as a loop correction to the power spectrum, so the standard linear bias picture still applies on very large scales; however, it contributes at leading order to the bispectrum for which it is significant on all scales. Such a term could also be present in Lagrangian space if halo formation were influenced by the tidal field. We measure the corresponding coupling strengths from the matter-matter-halo bispectrum in numerical simulations and find a nonvanishing coefficient for the tidal tensor term. We find no scale dependence of the inferred bias parameters up to $k\sim 0.1h{\mathrm{Mpc}}^{-1}$ and that the tidal effect is increasing with halo mass. While the local Lagrangian bias picture is a better description of our results than the local Eulerian bias picture, our results suggest that there might be a tidal tensor bias already in the initial conditions. We also find that the coefficients of the quadratic density term deviate quite strongly from the theoretical predictions based on the spherical collapse model and a universal mass function. Both quadratic density and tidal tensor bias terms must be included in the modeling of galaxy clustering of current and future surveys if one wants to achieve the high precision cosmology promise of these data sets.

The observed flux of ultrahigh energy (UHE) cosmic rays (CRs) guarantees the presence of high-energy cosmogenic neutrinos that are produced via photohadronic interactions of CRs propagating through intergalactic space. This flux of neutrinos doesn’t share the many uncertainties associated with the environment of the yet unknown CR sources. Cosmogenic neutrinos have nevertheless a strong model dependence associated with the chemical composition, source distribution or evolution and maximal injection energy of UHE CRs. We discuss a lower limit on the cosmogenic neutrino spectrum which depends on the observed UHE CR spectrum and composition and relates directly to experimentally observable and model-independent quantities. We show explicit limits for conservative assumptions about the source evolution.

We present search prospects and phenomenology of doubly resonant signals that come from the decay of a neutral weak-singlet color-octet vector state ${\omega }_8$ into a lighter weak-triplet color-octet scalar ${\pi }_8$, which can arise in several theories beyond the Standard Model. Taking $m_{{\omega }_8}-m_{{\pi }_8}>m_W$, we demonstrate an analysis of the signals $pp\to {\omega }_8\to {\pi }_8^{\pm }{W}^{\mp }({\pi }_8^{0}Z)\to g{W}^{\pm }{W}^{\mp }(gZZ)$. The present 8 TeV LHC run is found to have the potential to exclude or discover the signal for a range of masses and parameters. The preferred search channel has a boosted $W$-tagged jet forming a resonance with a second hard jet, in association with a lepton and missing energy.

We consider the constraints on $SO(10)$ unified models coming from the lower limits on proton lifetime and on the scale of $B-L$ symmetry breaking within the framework of the seesaw model for neutrino masses. By upgrading a triangular relationship for the inverse of ${\nu }_L$ Majorana masses to the experimental situation with nonmaximal ${\theta }_{23}$ and nonvanishing ${\theta }_{13}$, we get for the sum of ${\nu }_L$ masses the upper limit 0.16 eV.

In this paper, we study massless braneworld black holes as gravitational lenses. We find the weak and the strong deflection limits for the deflection angle, from which we calculate the positions and magnifications of the images. We compare the results obtained here with those corresponding to Schwarzschild and Reissner-Nordström spacetimes, and also with those found in previous works for some other braneworld black holes.

We study the gravitational field equations in the presence of a coupling between the derivative of a massless scalar field and the Einstein tensor. This configuration is motivated by Galileon gravity as it preserves shift invariance in the scalar sector. We analytically obtain solutions with static and spherically symmetric geometry, which also include black holes with a single regular horizon. We examine the thermodynamical properties of these solutions, and we reveal the nonperturbative nature of the coupling constant. We also find a phase transition, similar to the one described by Hawking and Page, which occurs at a critical temperature determined by both the black hole mass and by the strength of the coupling.

We study the Einstein-Born-Infeld (EBI) theory where the hairy black hole was found as the EBI black hole by using Hod’s idea. The hair extends beyond the photon sphere of the EBI black hole spacetimes. We show that the region beyond the photon sphere involves more than half of the total hair’s mass, which respects Hod’s conjectured bound.

Using the reduced basis approach, we efficiently compress and accurately represent the space of waveforms for nonprecessing binary black hole inspirals, which constitutes a four-dimensional parameter space (two masses, two spin magnitudes). Compared to the nonspinning case, we find that only a marginal increase in the (already relatively small) number of reduced basis elements is required to represent any nonprecessing waveform to nearly numerical round-off precision. Most parameters selected by the algorithm are near the boundary of the parameter space, leaving the bulk of its volume sparse. Our results suggest that the full eight-dimensional space (two masses, two spin magnitudes, four spin orientation angles on the unit sphere) may be highly compressible and represented with very high accuracy by a remarkably small number of waveforms, thus providing some hope that the number of numerical relativity simulations of binary black hole coalescences needed to represent the entire space of configurations is not intractable. Finally, we find that the distribution of selected parameters is robust to different choices of seed values starting the algorithm, a property which should be useful for indicating parameters for numerical relativity simulations of binary black holes. In particular, we find that the mass ratios $m_1/m_2$ of nonspinning binaries selected by the algorithm are mostly in the interval $[1,3]$ and that the median of the distribution follows a power-law behavior $\sim (m_1/m_2{)}^{-5.25}$.

The dynamics of expansion and large-scale structure formation of the Universe are analyzed for models with dark energy in the form of a phantom scalar field which initially mimics a $\Lambda$-term and evolves slowly to the Big Rip singularity. The discussed model of dark energy has three parameters—the density and the equation of state parameter at the current epoch, ${\Omega }_{\mathrm{de}}$ and $w_0$, and the asymptotic value of the equation of state parameter at $a\to \infty$, $c_a^2$. Their best-fit values are determined jointly with all other cosmological parameters by the Markov chain Monte Carlo method using observational data on cosmic microwave background anisotropies and polarization, supernovae type Ia luminosity distances, baryon acoustic oscillations measurements, and more. Similar computations are carried out for $\Lambda \mathrm{CDM}$ and a quintessence scalar field model of dark energy. It is shown that the current data slightly prefer the phantom model, but the differences in the maximum likelihoods are not statistically significant. It is also shown that the phantom dark energy with monotonically increasing density in the future will cause the decay of large-scale linear matter density perturbations due to the gravitational domination of dark energy perturbations long before the Big Rip singularity.

We analyze chiral symmetry breaking in quark matter in an external magnetic field at zero and finite temperature and quark chemical potential. We first give a brief overview of analytic results within the mean-field approximation. There the critical temperature for chiral restoration is increased by the magnetic field effect. Then we investigate the effects of matter and quantum fluctuations on the magnetic catalysis. More specifically, we compute the critical value of the four-Fermi coupling constant as a function of the magnetic field and the temperature for zero and finite quark chemical potential in the presence of quantum fluctuations. As soon as a nonzero temperature and/or density is turned on, long-range correlations are screened and the critical coupling is no longer vanishing. We extend our dynamical results beyond the leading-order bubble resummation, which results in a nonlocal four-Fermi coupling. This includes in-medium meson effects on the more quantitative level.

The ATLAS and CMS collaborations have announced discovery of a $\sim 125\mathrm{GeV}$ Higgs boson, after a combined analysis of the diphoton and $ZZ$ search channels. This observation has significant impact on low-energy supersymmetry. First, some fine-tuning is necessary to accommodate such a Higgs mass in the minimal supersymmetric Standard Model (MSSM) because the tree-level mass of the SM-like Higgs boson in the MSSM is relatively small. We study the possibility of lifting the mass of the SM-like Higgs boson by a non-decoupling a D-term from an additional $U(1)$ gauge symmetry. In particular, we focus on a gauged Peccei-Quinn symmetry which can also be related to a possible solution of the $\mu$ problem in the MSSM. In addition to the measurement of the mass of the Higgs, the data also reveals a tantalizing hint of a significantly enhanced diphoton signal rate, $1.56\pm 0.43$ and $1.9\pm 0.5$ times of the SM prediction in the CMS and ATLAS experiments, respectively. We demonstrate that such an enhancement can be accommodated in this MSSM extension. Anomaly cancellation requires the introduction of charged exotics. If some of them happen to be light and have sizable coupling to the SM-like Higgs boson, the diphoton signal rate can be enhanced significantly electroweak precision measurements provide stringent constraints on this model. Taking these into account, we identify two benchmark scenarios. We argue that they are representative of large classes of viable models beyond our current example which can consistently enhance the Higgs to diphoton rate. We also comment on possible signals of such light exotics at the LHC.