Showing 2009 · hep-phShow all

53 papers · 2 filters

hep-ph2009★ 84 cited

NLO QCD corrections to ZZ+jet production at hadron colliders

T. Binoth, T. Gleisberg, S. Karg +2

A fully differential calculation of the next-to-leading order QCD corrections to the production of Z-boson pairs in association with a hard jet at the Tevatron and LHC is presented…

hep-ph2009★ 2 cited

Next-to-Leading Order Jet Physics with BlackHat

C. F. Berger, Z. Bern, L. J. Dixon +6

We present several results obtained using the BlackHat next-to-leading order QCD program library, in conjunction with SHERPA. In particular, we present distributions for vector bos…

hep-ph2009★ 31 cited

Centrality, Rapidity and Transverse-Momentum Dependence of Cold Nuclear Matter Effects on J/Psi Production in d+Au, Cu+Cu and Au+Au Collisions at sqrt(s_NN)=200 GeV

E. G. Ferreiro, F. Fleuret, J. P. Lansberg +1

We have carried out a wide study of Cold Nuclear Matter (CNM) effects on J/Psi production in d+Au, Cu+Cu and Au+Au collisions at sqrt(s_NN)=200 GeV. We have studied the effects of…

hep-ph2009★ 5 cited

Collective Quartics from Simple Groups

Anson Hook, Jay G. Wacker

This article classifies Little Higgs models that have collective quartic couplings. There are two classes of collective quartics: Special Cosets and Special Quartics. After taking…

hep-ph2009★ 32 cited

Parity Violation in Composite Inelastic Dark Matter Models

Mariangela Lisanti, Jay G. Wacker

Recent experimental results indicate that the dark matter sector may have a non-minimal structure with a spectrum of states and interactions. Inelastic scattering has received part…

hep-ph2009★ 97 cited

Terrestrial and Solar Limits on Long-Lived Particles in a Dark Sector

Philip Schuster, Natalia Toro, Itay Yavin

Dark matter charged under a new gauge sector, as motivated by recent data, suggests a rich GeV-scale "dark sector" weakly coupled to the Standard Model by gauge kinetic mixing. The…

hep-ph2009★ 66 cited

Higher-Twist Dynamics in Large Transverse Momentum Hadron Production

Francois Arleo, Stanley J. Brodsky, Dae Sung Hwang +1

A scaling law analysis of the world data on inclusive large-pT hadron production in hadronic collisions is carried out. A significant deviation from leading-twist perturbative QCD…

hep-ph2009★ 121 cited

Dark Matter Particle Spectroscopy at the LHC: Generalizing MT2 to Asymmetric Event Topologies

Partha Konar, Kyoungchul Kong, Konstantin T. Matchev +1

We consider SUSY-like missing energy events at hadron colliders and critically examine the common assumption that the missing energy is the result of two identical missing particle…

hep-ph2009★ 28 cited

Dynamical Supersymmetry Breaking, with Flavor

Nathaniel Craig, Rouven Essig, Sebastian Franco +2

We explore calculable models with low-energy supersymmetry where the flavor hierarchy is generated by quark and lepton compositeness, and where the composites emerge from the same…

hep-ph2009★ 24 cited

Disentangling Dark Matter Dynamics with Directional Detection

Mariangela Lisanti, Jay G. Wacker

Inelastic dark matter reconciles the DAMA anomaly with other null direct detection experiments and points to a non-minimal structure in the dark matter sector. In addition to the d…

hep-ph2009★ 20 cited

Measuring Sparticles with the Matrix Element

Johan Alwall, Ayres Freitas, Olivier Mattelaer

We apply the Matrix Element Method (MEM) to mass determination of squark pair production with direct decay to quarks and LSP at the LHC, showing that simultaneous mass determinatio…

hep-ph2009★ 13 cited

Massless versus Kaluza-Klein Gravitons at the LHC

Xavier Calmet, Priscila de Aquino, Thomas G. Rizzo

We show that the LHC will be able to differentiate between a four-dimensional model with quantum gravity at ~1 TeV where the (massless) graviton becomes strongly coupled to standar…

hep-ph2009★ 1 cited

MSSM Dark Matter Without Prejudice

James S. Gainer

Recently we examined a large number of points in a 19-dimensional parameter subspace of the CP-conserving MSSM with Minimal Flavor Violation. We determined whether each of these po…

hep-ph2009★ 85 cited

Superpartner mass measurements with 1D decomposed MT2

Partha Konar, Kyoungchul Kong, Konstantin T. Matchev +1

We propose a new model-independent technique for mass measurements in missing energy events at hadron colliders. We illustrate our method with the most challenging case of a short,…

hep-ph2009★ 123 cited

On soft singularities at three loops and beyond

Lance J. Dixon, Einan Gardi, Lorenzo Magnea

We report on further progress in understanding soft singularities of massless gauge theory scattering amplitudes. Recently, a set of equations was derived based on Sudakov factoriz…

hep-ph2009★ 97 cited

A Little Solution to the Little Hierarchy Problem: A Vector-like Generation

Peter W. Graham, Ahmed Ismail, Surjeet Rajendran +1

We present a simple solution to the little hierarchy problem in the MSSM: a vector-like fourth generation. With O(1) Yukawa couplings for the new quarks, the Higgs mass can natural…

hep-ph2009★ 59 cited

High Energy Electron Signals from Dark Matter Annihilation in the Sun

Philip Schuster, Natalia Toro, Neal Weiner +1

In this paper we discuss two mechanisms by which high energy electrons resulting from dark matter annihilations in or near the Sun can arrive at the Earth. Specifically, electrons…

hep-ph2009★ 73 cited

Light-Front Holography and Gauge/Gravity Duality: The Light Meson and Baryon Spectra

Guy F. de Teramond, Stanley J. Brodsky

Starting from the bound state Hamiltonian equation of motion in QCD, we derive relativistic light-front wave equations in terms of an invariant impact variable which measures t…

hep-ph2009★ 4 cited

Light-Front Holography, AdS/QCD, and Hadronic Phenomena

Stanley J. Brodsky, Guy F. de Teramond

AdS/QCD, the correspondence between theories in a modified five-dimensional anti-de Sitter space and confining field theories in physical space-time, provides a remarkable semiclas…

hep-ph2009★ 60 cited

From the LHC to Future Colliders

A. De Roeck, J. Ellis, C. Grojean +61

Discoveries at the LHC will soon set the physics agenda for future colliders. This report of a CERN Theory Institute includes the summaries of Working Groups that reviewed the phys…

hep-ph2009★ 46 cited

Supersymmetric Higgs Bosons and Beyond

Marcela Carena, Kyoungchul Kong, Eduardo Ponton +1

We consider supersymmetric models that include particles beyond the Minimal Supersymmetric Standard Model (MSSM) with masses in the TeV range, and that couple significantly to the…

hep-ph2009★ 46 cited

Study of Higgs boson production and its b-bbar decay in gamma-gamma processes in proton-nucleus collisions at the LHC

David d'Enterria, Jean-Philippe Lansberg

We explore for the first time the possibilities to measure an intermediate-mass (mH = 115-140 GeV/c^2) Standard-Model Higgs boson in electromagnetic proton-lead (pPb) interactions…

hep-ph2009★ 16 cited

Cosmic Ray Spectra in Nambu-Goldstone Dark Matter Models

Masahiro Ibe, Hitoshi Murayama, Satoshi Shirai +1

We discuss the cosmic ray spectra in annihilating/decaying Nambu-Goldstone dark matter models. The recent observed positron/electron excesses at PAMELA and Fermi experiments are we…

hep-ph2009★ 24 cited

Spin-Dependent Antenna Splitting Functions

Andrew J. Larkoski, Michael E. Peskin

We consider parton showers based on radiation from QCD dipoles or `antennae'. These showers are built from 2->3 parton splitting processes. The question then arises of what functio…