Universitat de Barcelona

output

19912026

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 2009 · hep-phShow all

32 papers · 2 filters

hep-ph2009★ 27 cited

The effect of kinematic constraints on multi-tension string network evolution

A. Avgoustidis, E. J. Copeland

We consider the evolution of a network of strings in an expanding universe, allowing for the formation of junctions between strings of different tensions. By explicitly including,…

hep-ph2009★ 20 cited

The axion shield

A. Andrianov, D. Espriu, F. Mescia +1

We investigate the propagation of a charged particle in a spatially constant, but time dependent, pseudoscalar background. Physically this pseudoscalar background could be provided…

hep-ph2009★ 29 cited

A New Mechanism of Quark Energy Loss

Jorge Casalderrey-Solana, Daniel Fernandez, David Mateos

We show that a heavy quark moving sufficiently fast through a quark-gluon plasma may lose energy by Cherenkov-radiating mesons. We demonstrate that this takes place in all strongly…

hep-ph2009★ 124 cited

Fitting Parton Distribution Data with Multiplicative Normalization Uncertainties

The NNPDF Collaboration, Richard D. Ball, Luigi Del Debbio +5

We consider the generic problem of performing a global fit to many independent data sets each with a different overall multiplicative normalization uncertainty. We show that the me…

hep-ph2009

Strange mesons from SIS to FAIR

L. Tolos, D. Cabrera, A. Polls +1

The properties of $K$ and $K ˉ$ mesons in nuclear matter at finite temperature are obtained from a chiral unitary approach in coupled channels which incorporates the $s$ - and p-…

hep-ph2009★ 12 cited

Exclusive J/Psi electroproduction in a dual model

R. Fiore, L. L. Jenkovszky, V. K. Magas +2

Exclusive J/Psi electroproduction is studied in the framework of the analytic S-matrix theory. The differential and integrated elastic cross sections are calculated using the Modif…

hep-ph2009

Strange and charm mesons at FAIR

L. Tolos, D. Cabrera, D. Gamermann +5

We study the properties of strange and charm mesons in hot and dense matter within a self-consistent coupled-channel approach for the experimental conditions of density and tempera…

hep-ph2009★ 10 cited

Inclusive J/ψProduction In ΥDecay Via Color-singlet Mechanism

Zhi-Guo He, Jian-Xiong Wang

We reconsider the tree level color-singlet contribution for the inclusive J/ψproduction in Υdecay with the α_{s}^{5} order QCD process Υ\to J/ψ+c\bar{c}+g and α^{2}α_s^{2} order QE…

hep-ph2009★ 1 cited

Quantum Decoherence of Photons in the Presence of Hidden U(1)s

M. Ahlers, L. A. Anchordoqui, M. C. Gonzalez-Garcia

Many extensions of the standard model predict the existence of hidden sectors that may contain unbroken abelian gauge groups. We argue that in the presence of quantum decoherence p…

hep-ph2009★ 30 cited

Direct determination of the solar neutrino fluxes from solar neutrino data

M. C. Gonzalez-Garcia, Michele Maltoni, Jordi Salvado

We determine the solar neutrino fluxes from a global analysis of the solar and terrestrial neutrino data in the framework of three-neutrino mixing. Using a Bayesian approach we rec…

hep-ph2009★ 25 cited

Search for $C = +$ charmonium and bottomonium states in $e^{+} e^{-} \to γ + X$ at B factories

Dan Li, Zhi-Guo He, Kuang-Ta Chao

We study the production of $C = +$ charmonium states $X$ in $e^{+} e^{-} \to γ + X$ at B factories with $X = η_{c} (n S)$ (n=1,2,3), $χ_{c J} (m P)$ (m=1,2), and $^{1} D_{2} (1 D)$ . In the S and P wave cas…

hep-ph2009★ 81 cited

Estimates of hadron azimuthal anisotropy from multiparton interactions in proton-proton collisions at sqrt(s) = 14 TeV

D. d'Enterria, G. Kh. Eyyubova, V. L. Korotkikh +4

We estimate the amount of collective "elliptic flow" expected at mid-rapidity in proton-proton (p-p) collisions at the CERN Large Hadron Collider (LHC), assuming that any possible…

hep-ph2009★ 26 cited

Leptogenesis without violation of B-L

M. C. Gonzalez-Garcia, J. Racker, N. Rius

We study the possibility of generating the observed baryon asymmetry via leptogenesis in the decay of heavy Standard Model singlet fermions which carry lepton number, in a framewor…

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★ 35 cited

Neutral Higgs-pair production at Linear Colliders within the general 2HDM: quantum effects and triple Higgs boson self-interactions

David Lopez-Val, Joan Sola

The pairwise production of neutral Higgs bosons is analyzed in the context of the future linear colliders, such as the ILC and CLIC, within the general Two-Higgs-Doublet Model (2HD…

hep-ph2009★ 21 cited

Signals for New Spin-1 Resonances in Electroweak Gauge Boson Pair Production at the LHC

A. Alves, O. J. P. Eboli, D. Goncalves +2

The mechanism of electroweak symmetry breaking (EWSB) will be directly scrutinized soon at the CERN Large Hadron Collider (LHC). We analyze the LHC potential to look for new vector…

hep-ph2009★ 24 cited

BMSSM Implications for Cosmology

Nicolas Bernal, Kfir Blum, Marta Losada +1

The addition of non-renormalizable terms involving the Higgs fields to the MSSM (BMSSM) ameliorates the little hierarchy problem of the MSSM. We analyze in detail the two main cosm…

hep-ph2009★ 246 cited

Flavor Physics in the Quark Sector

M. Antonelli, D. M. Asner, D. Bauer +137

One of the major challenges of particle physics has been to gain an in-depth understanding of the role of quark flavor and measurements and theoretical interpretations of their res…

hep-ph2009★ 78 cited

Dynamically generated open charmed baryons beyond the zero range approximation

C. E. Jimenez-Tejero, A. Ramos, I. Vidana

The interaction of the low lying pseudo-scalar mesons with the ground state baryons in the charm sector is studied within a coupled channel approach using a t-channel vector-exchan…

hep-ph2009★ 19 cited

A Phenomenological Study of Bottom Quark Fragmentation in Top Quark Decay

Gennaro Corcella, Federico Mescia

Top-quark physics is one of the main fields of investigation at the Tevatron accelerator and, ultimately, at the LHC. We perform a phenomenological analysis of ttbar events at hadr…

hep-ph2009★ 56 cited

Anomalous positron excess from Lorentz-violating QED

Alexander A. Andrianov, Domenec Espriu, Paola Giacconi +1

We entertain the idea that a suitable background of cold (very low momentum) pseudoscalar particles or condensate, may trigger a background that effectively generates Lorentz-invar…

hep-ph2009★ 2 cited

Dynamically generated resonances

E. Oset, A. Ramos, S. Sarkar +8

In this talk I report on recent work related to the dynamical generation of baryonic resonances, some made up from pseudoscalar meson-baryon, others from vector meson-baryon and a…

hep-ph2009★ 6 cited

Charmed baryon resonances with heavy-quark symmetry

L. Tolos, C. Garcia-Recio, V. K. Magas +4

We study charmed baryon resonances that are generated dynamically from a coupled-channel unitary approach that implements heavy-quark symmetry. Some states can already be identifie…