HERA prospects on compositeness and new vector bosons

Autor: Pierre Chiappetta, J.-M. Virey

Publikováno v: Physics Letters B. 389:89-92

The absence of deviations from the Standard Model for the differential cross section ${d\sigma}/{dQ^2}$ at HERA is used to set limits on electron quark compositeness scale and on new vector bosons, especially the hadrophilic one recently introduced a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::610d9b9c6dd788e1e66b34c9dc167d4c
https://doi.org/10.1016/s0370-2693(96)01245-2

Top-induced electroweak breaking in the minimal supersymmetric standard model

Autor: Pierre Chiappetta, Jean-Marc Gérard, R. Gonzalez Felipe, Jacques Weyers, Masud Chaichian

Publikováno v: Physics Letters B. 365:141-148

Severe constraints on parameters of the minimal supersymmetric standard model follow from a dynamical electroweak symmetry breaking mechanism dominated by top and stop loops. In particular, the lightest Higgs boson mass is expected to be smaller than

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d33df63460e7931d25d1f25c6cf8f7d
https://doi.org/10.1016/0370-2693(95)01238-9

Double prompt photon production from hadronic collisions

Autor: J.Ph. Guillet, R. Fergani, Pierre Chiappetta

Publikováno v: Physics Letters B. 348:646-656

We study the transverse momentum spectrum of the photon pair produced from hadronic collisions. Resummation of soft gluons is essential to bring the QCD predictions in agreement with experimental fixed target data.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ff4251c0f4688e02556990c588e6df4
https://doi.org/10.1016/0370-2693(95)00161-d

Higgs search by neural networks at LHC

Autor: Pierre Chiappetta, P. Colangelo, P. De Felice, Guido Pasquariello, Giuseppe Nardulli

Publikováno v: Physics letters. B
322 (1994): 219–223. doi:10.1016/0370-2693(94)91110-X
info:cnr-pdr/source/autori:CHIAPPETTA P and COLANGELO P and DEFELICE P and NARDULLI G and PASQUARIELLO G./titolo:HIGGS SEARCH BY NEURAL NETWORKS AT LHC/doi:10.1016%2F0370-2693(94)91110-X/rivista:Physics letters. B (Print)/anno:1994/pagina_da:219/pagina_a:223/intervallo_pagine:219–223/volume:322

We show that neural network classifiers can be used to discriminate Higgs production from background at LHC for $ 150< M_H
LaTex, 9 pages, 1 figure (Postscript file included), CPT-93/PE 2969, BARI-TH/159-93

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da487f894eed6c2c8ae049f0958a0bd8
https://doi.org/10.1016/0370-2693(94)91110-x

Hadronic colliders as probes of the proton spin structure

Autor: J.Ph. Guillet, P. Colangelo, Pierre Chiappetta, Giuseppe Nardulli

Publikováno v: Zeitschrift für Physik C Particles and Fields. 59:629-639

We perform a systematic analysis of different processes with high energy polarized proton beams: jets, direct photon, lepton pairs (Drell-Yan) andWZ production. Different sets of polarized partonic densities are used that fit EMC and SLAC polarized d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::56754869574840667bea5b4d26042c84
https://doi.org/10.1007/bf01562555