# Journal of High Energy Physics

## List of Papers (Total 9,954)

#### Search for a fermiophobic Higgs boson in pp collisions at $\sqrt {s} = 7$ TeV

Combined results are reported from searches for a fermiophobic Higgs boson in the γγ, WW, and ZZ decay modes in proton-proton collisions at $\sqrt {s} = 7$ TeV. The explored Higgs boson mass range is 110–300 GeV. The data sample corresponds to an integrated luminosity of 4.9–5.1 fb−1. A fermiophobic Higgs boson is excluded at 95% confidence level in the mass range 110–194 GeV, ...

#### Suppression of high transverse momentum D mesons in central Pb-Pb collisions at $\sqrt{{{s_{\mathrm{NN}}}}}=2.76\;\mathrm{TeV}$

The production of the prompt charm mesons D0, D+, D*+, and their antiparticles, was measured with the ALICE detector in Pb-Pb collisions at the LHC, at a centre-of-mass energy $\sqrt{{{s_{\mathrm{NN}}}}}=2.76\;\mathrm{TeV}$ per nucleon-nucleon collision. The p t-differential production yields in the range 2 < p t < 16 GeV/c at central rapidity, |y| < 0.5, were used to calculate ...

#### The Higgs sector of the phenomenological MSSM in the light of the Higgs boson discovery

The long awaited discovery of a new light scalar boson at the LHC opens up a new era of studies of the Higgs sector in the Standard Model and in its extensions. In this paper we discuss the consequences of the observation of a light Higgs boson with the mass and rates reported by the ATLAS and CMS collaborations on the parameter space of the phenomenological MSSM, accounting also ...

#### The gluino-glue particle and finite size effects in supersymmetric Yang-Mills theory

The spectrum of particles in supersymmetric Yang-Mills theory is expected to contain a spin 1/2 bound state of gluons and gluinos, the gluino-glue particle. We study the mass of this particle in softly broken supersymmetric Yang-Mills theory on a lattice by means of numerical simulations. The main focus is the estimation of finite size effects. We extrapolate the mass first to the ...

#### Resilience of the spectral standard model

We show that the inconsistency between the spectral Standard Model and the experimental value of the Higgs mass is resolved by the presence of a real scalar field strongly coupled to the Higgs field. This scalar field was already present in the spectral model and we wrongly neglected it in our previous computations. It was shown recently by several authors, independently of the ...

#### Duality covariant non-BPS first order systems

We study extremal black hole solutions to four dimensional $\mathcal{N} = {2}$ supergravity based on a cubic symmetric scalar manifold. Using the coset construction available for these models, we define the first order flow equations implied by the corresponding nilpotency conditions on the three-dimensional scalar momenta for the composite non-BPS class of multi-centre black ...

#### Search for dark matter and large extra dimensions in monojet events in pp collisions at $\sqrt {s} = {7}$ TeV

A search has been made for events containing an energetic jet and an imbalance in transverse momentum using a data sample of pp collisions at a center-of-mass energy of 7 TeV. This signature is common to both dark matter and extra dimensions models. The data were collected by the CMS detector at the LHC and correspond to an integrated luminosity of 5.0 fb−1. The number of observed ...

#### LHC sensitivity to lepton flavour violating Z boson decays

We estimate that the LHC could set bounds BR(Z → μ ± e ∓) < 4.1 × 10−7 and BR(Z → τ ± μ ∓) < 3.5 × 10−6 (at 95% C.L.) with 20 fb−1 of data at 8 TeV. A similar sensitivity can be anticipated for Z → τ ± e ∓, because we consider leptonic τ decays such that Z → τ ± μ ∓ → e ± μ ∓ + invisible. These limits can be compared to the LEP1 bounds of order 10−5 → 10−6. Such collider searches ...

#### The effective field theory of cosmological large scale structures

Large scale structure surveys will likely become the next leading cosmological probe. In our universe, matter perturbations are large on short distances and small at long scales, i.e. strongly coupled in the UV and weakly coupled in the IR. To make precise analytical predictions on large scales, we develop an effective field theory formulated in terms of an IR effective fluid ...

#### Search for the Standard Model Higgs boson in the H → τ + τ − decay mode in $\sqrt {s} = 7\,{\mathrm{TeV}}$ pp collisions with ATLAS

A search for the Standard Model Higgs boson decaying into a pair of τ leptons is reported. The analysis is based on a data sample of proton-proton collisions collected by the ATLAS experiment at the LHC and corresponding to an integrated luminosity of 4.7 fb−1. No significant excess over the expected background is observed in the Higgs boson mass range of 100–150 GeV. The observed ...

#### Does the ‘Higgs’ have Spin Zero?

The Higgs boson is predicted to have spin zero. The ATLAS and CMS experiments have recently reported of an excess of events with mass ~ 125 GeV that has some of the characteristics expected for a Higgs boson. We address the questions whether there is already any evidence that this excess has spin zero, and how this possibility could be confirmed in the near future. The excess ...

#### Large N Free Energy of 3d $\mathcal{N}$ = 4 SCFTs and AdS4/CFT3

We provide a non-trivial check of the AdS4/CFT3 correspondence recently proposed in [1] by verifying the GKPW relation in the large N limit. The CFT free energy is obtained from the previous works [2, 3] on the S 3 partition function for 3-dimensional N =4SCFTT[SU(N)]. ThisismatchedwiththecomputationofthetypeIIBactionon the corresponding gravity background. We unexpectedly find ...

#### On semiclassical analysis of pure spinor superstring in an AdS 5 × S 5 background

Relation between semiclassical analyses of Green-Schwarz and pure spinor formalisms in an AdS 5 × S 5 background is clarified. It is shown that the two formalisms have identical semiclassical partition functions for a simple family of classical solutions. It is also shown that, when the classical string is furthermore rigid, this in turn implies that the two formalisms predict the ...

#### Inclusive deep inelastic scattering at high Q 2 with longitudinally polarised lepton beams at HERA

Inclusive e ± p single and double differential cross sections for neutral and charged current deep inelastic scattering processes are measured with the H1 detector at HERA. The data were taken at a centre-of-mass energy of $\sqrt {s} = {319}$ GeV with a total integrated luminosity of 333.7 pb−1 shared between two lepton beam charges and two longitudinal lepton polarisation ...

#### Universal contributions to scalar masses from five dimensional supergravity

We compute the effective Kahler potential for matter fields in warped compactifications, starting from five dimensional gauged supergravity, as a function of the matter fields localization. We show that truncation to zero modes is inconsistent and the tree-level exchange of the massive gravitational multiplet is needed for consistency of the four-dimensional theory. In addition to ...

#### A critical appraisal of NLO+PS matching methods

In this publication, uncertainties in and differences between the MC@NLO and POWHEG methods for matching next-to-leading order QCD calculations with parton showers are discussed. Implementations of both algorithms within the event generator SHERPA and based on Catani-Seymour subtraction are employed to assess the impact on a representative selection of observables. In the case of ...

#### A search for $t\overline t$ resonances in lepton+jets events with highly boosted top quarks collected in pp collisions at $\sqrt {s} = 7$ TeV with the ATLAS detector

A search for resonant production of high-mass top-quark pairs is performed on 2.05 fb−1 of proton-proton collisions at $\sqrt {s} = 7$ TeV collected in 2011 with the ATLAS experiment at the Large Hadron Collider. This analysis of the lepton+jets final state is specifically designed for the particular topology that arises from the decay of highly boosted top quarks. The observed ...

#### Higgs, moduli problem, baryogenesis and large volume compactifications

We consider the cosmological moduli problem in the context of high-scale supersymmetry breaking suggested by the recent discovery of the standard-model like Higgs boson. In order to solve the notorious moduli-induced gravitino problem, we focus on the LARGE volume scenario, in which the modulus decay into gravitinos can be kinematically forbidden. We then consider the Affleck-Dine ...

#### Free energy v.s. Sasaki-Einstein volume for infinite families of M2-brane theories

We investigate infinite families of 3d $\mathcal{N} = {2}$ superconformal Chern-Simons quivers with an arbitrarily large number of gauge groups arising on M2-branes over toric CY4’s. These theories have the same matter content and superpotential of those on D3-branes probing cones over L a,b,a Sasaki-Einstein manifolds. For all these infinite families, we explicitly show the ...

#### Natural SUSY endures

The first 1 fb−1 of LHC searches have set impressive limits on new colored particles decaying to missing energy. We address the implication of these searches for naturalness in supersymmetry (SUSY). General bottom-up considerations of natural electroweak symmetry breaking show that higgsinos, stops, and the gluino should not be too far above the weak scale. The rest of the ...

#### Search for anomalous $t\overline t$ production in the highly-boosted all-hadronic final state

A search is presented for a massive particle, generically referred to as a Z′, decaying into a ${\mathrm{t}}\overline {\mathrm{t}}$ pair. The search focuses on Z′ resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to ...

#### Matrix elements of unstable states

Using the language of non-relativistic effective Lagrangians, we formulate a systematic framework for the calculation of resonance matrix elements in lattice QCD. The generalization of the Lüscher-Lellouch formula for these matrix elements is derived. We further discuss in detail the procedure of the analytic continuation of the resonance matrix elements into the complex energy ...

#### Towards the continuous limit of cluster integrable systems

We initiate the study of how to extend the correspondence between dimer models and (0 + 1)-dimensional cluster integrable systems to (1 + 1) and (2 + 1)-dimensional continuous integrable field theories, addressing various points that are necessary for achieving this goal. We first study how to glue and split two integrable systems, from the perspectives of the spectral curve, the ...

#### The transfer matrix in four-dimensional CDT

The Causal Dynamical Triangulation model of quantum gravity (CDT) has a transfer matrix, relating spatial geometries at adjacent (discrete lattice) times. The transfer matrix uniquely determines the theory. We show that the measurements of the scale factor of the (CDT) universe are well described by an effective transfer matrix where the matrix elements are labeled only by the ...

#### Enhancing lepton flavour violation in the supersymmetric inverse seesaw beyond the dipole contribution

In minimal supersymmetric models the Z-penguin usually provides sub-dominant contributions to charged lepton flavour violating observables. In this study, we consider the supersymmetric inverse seesaw in which the non-minimal particle content allows for dominant contributions of the Z-penguin to several lepton flavour violating observables. In particular, and due to the low-scale ...