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19912026
Showing 2009 · hep-phShow all

67 papers · 2 filters

hep-ph2009★ 27 cited

QCD corrections to stoponium production at hadron colliders

James E. Younkin, Stephen P. Martin

If the lighter top squark has no kinematically allowed two-body decays that conserve flavor, then it will live long enough to form hadronic bound states. The observation of the dip…

hep-ph2009★ 83 cited

Discovering the Higgs Boson in New Physics Events using Jet Substructure

Graham D. Kribs, Adam Martin, Tuhin S. Roy +1

We present a novel method to discover the Higgs boson in new physics event samples at the LHC. Our technique applies to broad classes of models where the Higgs has a significant br…

hep-ph2009★ 12 cited

Semileptonic decays of the standard Higgs boson

Bogdan A. Dobrescu, Joseph D. Lykken

The Higgs boson decay into a pair of real or virtual W bosons, with one of them decaying leptonically, is predicted within the Standard Model to have the largest branching fraction…

hep-ph2009★ 57 cited

Charged Higgs boson production in association with a top quark in MC@NLO

C. Weydert, S. Frixione, M. Herquet +5

We discuss the calculation of charged Higgs boson production in association with top quark in the MC@NLO framework for combining NLO matrix elements with a parton shower. The proce…

hep-ph2009★ 21 cited

Predictions for m_t and m_W in Minimal Supersymmetric Models

O. Buchmueller, R. Cavanaugh, A. De Roeck +7

Using a frequentist analysis of experimental constraints within two versions of the minimal supersymmetric extension of the Standard Model, we derive the predictions for the top qu…

hep-ph2009★ 9 cited

Neutralino dark matter annihilation to monoenergetic gamma rays as a signal of low mass superstrings

Luis A. Anchordoqui, Haim Goldberg, Dan Hooper +2

We consider extensions of the standard model based on open strings ending on D-branes, in which gauge bosons and their associated gauginos exist as strings attached to stacks of D-…

hep-ph2009★ 21 cited

The Lepton Sector of a Fourth Generation

Gustavo Burdman, Leandro Da Rold, Ricardo D. Matheus

In extensions of the standard model with a heavy fourth generation one important question is what makes the fourth-generation lepton sector, particularly the neutrinos, so differen…

hep-ph2009★ 135 cited

Global interpretation of direct Dark Matter searches after CDMS-II results

Joachim Kopp, Thomas Schwetz, Jure Zupan

We perform a global fit to data from Dark Matter (DM) direct detection experiments, including the recent CDMS-II results. We discuss possible interpretations of the DAMA annual mod…

hep-ph2009★ 44 cited

Constraining chameleon field theories using the GammeV afterglow experiments

A. Upadhye, J. H. Steffen, A. Weltman

The GammeV experiment has constrained the couplings of chameleon scalar fields to matter and photons. Here we present a detailed calculation of the chameleon afterglow rate underly…

hep-ph2009★ 229 cited

Extra vector-like matter and the lightest Higgs scalar boson mass in low-energy supersymmetry

Stephen P. Martin

The lightest Higgs scalar boson mass in supersymmetry can be raised significantly by extra vector-like quark and lepton supermultiplets with large Yukawa couplings but dominantly e…

hep-ph2009★ 2 cited

Overview of Neutrino Mixing Models and Their Mixing Angle Predictions

Carl H. Albright

An overview of neutrino-mixing models is presented with emphasis on the types of horizontal flavor and vertical family symmetries that have been invoked. Distributions for the mixi…

hep-ph2009★ 36 cited

Efficient Color-Dressed Calculation of Virtual Corrections

Walter Giele, Zoltan Kunszt, Jan Winter

With the advent of generalized unitarity and parametric integration techniques, the construction of a generic Next-to-Leading Order Monte Carlo becomes feasible. Such a generator w…

hep-ph2009★ 43 cited

Cascade Events at IceCube+DeepCore as a Definitive Constraint on the Dark Matter Interpretation of the PAMELA and Fermi Anomalies

Sourav K. Mandal, Matthew R. Buckley, Katherine Freese +2

Dark matter decaying or annihilating into mu+mu- or tau+tau- has been proposed as an explanation for the e+e- anomalies reported by PAMELA and Fermi. Recent analyses show that IceC…

hep-ph2009★ 288 cited

Dark Matter Self-Interactions and Light Force Carriers

Matthew R. Buckley Patrick J. Fox

Recent observations from PAMELA, FERMI, and ATIC point to a new source of high energy cosmic rays. If these signals are due to annihilating dark matter, then the annihilation cross…

hep-ph2009★ 19 cited

Ultra-low Q values for neutrino mass measurements

Joachim Kopp, Alexander Merle

We investigate weak nuclear decays with extremely small kinetic energy release (Q value) and thus extremely good sensitivity to the absolute neutrino mass scale. In particular, we…

hep-ph2009★ 80 cited

New parton distributions from large-x and low-Q^2 data

A. Accardi, M. E. Christy, C. E. Keppel +4

We report results of a new global next-to-leading order fit of parton distribution functions in which cuts on W and Q are relaxed, thereby including more data at high values of x.…

hep-ph2009★ 15 cited

Topological Interactions in Warped Extra Dimensions

Yang Bai, Gustavo Burdman, Christopher T. Hill

Topological interactions will be generated in theories with compact extra dimensions where fermionic chiral zero modes have different localizations. This is the case in many warped…

hep-ph2009★ 54 cited

Analytic results for the one-loop NMHV Hqqgg amplitude

Simon Badger, John M. Campbell, R. Keith Ellis +1

We compute the one-loop amplitude for a Higgs boson, a quark-antiquark pair and a pair of gluons of negative helicity, i.e. for the next-to-maximally helicity violating (NMHV) case…

hep-ph2009★ 48 cited

The Dark Side of the Electroweak Phase Transition

Subinoy Das, Patrick J. Fox, Abhishek Kumar +1

Recent data from cosmic ray experiments may be explained by a new GeV scale of physics. In addition the fine-tuning of supersymmetric models may be alleviated by new O(GeV) states…

hep-ph2009★ 72 cited

Parton Distributions for Event Generators

Hung-Liang Lai, Joey Huston, Stephen Mrenna +4

In this paper, conventional Global QCD analysis is generalized to produce parton distributions optimized for use with event generators at the LHC. This optimization is accomplished…

hep-ph2009★ 9 cited

Pamela, FGST and Sub-Tev Dark Matter

Dan Hooper, Kathryn M. Zurek

PAMELA's observation that the cosmic ray positron fraction increases rapidly with energy implies the presence of primary sources of energetic electron-positron pairs. Of particular…

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★ 167 cited

Quirky Composite Dark Matter

Graham D. Kribs, Tuhin S. Roy, John Terning +1

We propose a new dark matter candidate, quirky dark matter, that is a scalar baryonic bound state of a new non-Abelian force that becomes strong below the electroweak scale. The bo…

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…