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Title: Observation potential for {chi}{sub b} at the Fermilab Tevatron and CERN LHC

Abstract

We confirm the results of previous works that the internal motion of quarks inside charmonium mesons increases the cross section of the process e{sup +}e{sup -}{yields}J/{psi}{eta}{sub c}. We also show, that this effect increases the widths of the scalar meson decay into two vector ones and state that the decays {chi}{sub b0,2}{yields}2J/{psi} can be used to detect these scalar mesons at Tevatron and LHC colliders.

Authors:
; ;  [1]
  1. Institute for High Energy Physics, Protvino (Russian Federation)
Publication Date:
OSTI Identifier:
20713832
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 72; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.72.094018; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CERN LHC; ELECTRON-POSITRON INTERACTIONS; ETA C-2980 MESONS; FERMILAB TEVATRON; HADRONIC PARTICLE DECAY; J PSI-3097 MESONS; PARTICLE IDENTIFICATION; PARTICLE WIDTHS; POTENTIALS; QUARKS; SCALAR MESONS

Citation Formats

Braguta, V.V., Likhoded, A.K., and Luchinsky, A.V. Observation potential for {chi}{sub b} at the Fermilab Tevatron and CERN LHC. United States: N. p., 2005. Web. doi:10.1103/PhysRevD.72.094018.
Braguta, V.V., Likhoded, A.K., & Luchinsky, A.V. Observation potential for {chi}{sub b} at the Fermilab Tevatron and CERN LHC. United States. doi:10.1103/PhysRevD.72.094018.
Braguta, V.V., Likhoded, A.K., and Luchinsky, A.V. Tue . "Observation potential for {chi}{sub b} at the Fermilab Tevatron and CERN LHC". United States. doi:10.1103/PhysRevD.72.094018.
@article{osti_20713832,
title = {Observation potential for {chi}{sub b} at the Fermilab Tevatron and CERN LHC},
author = {Braguta, V.V. and Likhoded, A.K. and Luchinsky, A.V.},
abstractNote = {We confirm the results of previous works that the internal motion of quarks inside charmonium mesons increases the cross section of the process e{sup +}e{sup -}{yields}J/{psi}{eta}{sub c}. We also show, that this effect increases the widths of the scalar meson decay into two vector ones and state that the decays {chi}{sub b0,2}{yields}2J/{psi} can be used to detect these scalar mesons at Tevatron and LHC colliders.},
doi = {10.1103/PhysRevD.72.094018},
journal = {Physical Review. D, Particles Fields},
number = 9,
volume = 72,
place = {United States},
year = {Tue Nov 01 00:00:00 EST 2005},
month = {Tue Nov 01 00:00:00 EST 2005}
}
  • We calculate several differential distributions for exclusive double-diffractive {chi}{sub c}(0{sup ++}) production in the proton-antiproton collisions at the Tevatron and in proton-proton collisions at RHIC and LHC. We use unintegrated gluon distributions (UGDFs) within the k{sub t}-factorization approach. The g*g*{yields}{chi}{sub c}(0{sup ++}) transition vertex is calculated as a function of gluon virtualities via the standard perturbative nonrelativistic QCD technique. The off shell effects are discussed and quantified. They lead to a reduction of the cross section by a factor of 2-5, depending on the position in the phase space and UGDFs. Different models of UGDFs are used and the resultsmore » are shown and discussed. The cross section for the diffractive component depends strongly on UGDFs. Transverse momentum distribution of {chi}{sub c}(0) shows a well localized minimum. We calculate also the differential distributions for the {gamma}*{gamma}*{yields}{chi}{sub c}(0{sup ++}) fusion mechanism. The integrated cross section for photon-photon fusion is much smaller than that of diffractive origin. The two components have very different dependence on the momentum transfers t{sub 1}, t{sub 2} in the nucleon lines as well as azimuthal-angle correlations between both outgoing nucleons.« less
  • Results of recent studies that indicate that allowance for the relative motion of quarks in mesons leads to an increase in the cross sections for the process e{sup +}e{sup -} {sup {yields}} J/{psi}{eta}{sub c} are confirmed. It is shown that the same effect also leads to an increase in the width of scalar and tensor mesons with respect to their decay to two vector mesons, so that the decays {chi}{sub b0,2} {sup {yields}} 2J/{psi} can be used to observe these mesons at the Tevatron collider and LHC.
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  • We calculate the cross section for {eta}{sub b} production at the Tevatron at next-to-leading-order in the strong coupling and find that more than two millions of {eta}{sub b}'s are expected per inverse picobarn of integrated luminosity. We discuss the decay modes into charmed states and suggest that the decays into D{sup *}D{sup (*)} mesons might be the most promising channels to observe the {eta}{sub b} in Run II.
  • We study the discovery potential of the CERN LHC, Fermilab Tevatron and CERN LEP colliders in the search for the neutral CP-even Higgs boson of the MSSM which couples to the weak gauge bosons with a strength close to the standard model one and, hence, plays a relevant role in the mechanism of electroweak symmetry breaking. We place special emphasis on the radiative effects which influence the discovery reach of these colliders. We concentrate on the Vbb(bar sign) channel, with V=Z or W, and on the channels with diphoton final states, which are the dominant ones for the search formore » a light standard model Higgs boson at LEP or Tevatron and LHC, respectively. By analyzing the parameters of the MSSM for which the searches become difficult at one or more of these three colliders, we demonstrate their complementarity in the search for a light Higgs boson which plays a relevant role in the mechanism of electroweak symmetry breaking. (c) 2000 The American Physical Society.« less