+++ /dev/null
-<html>
-<head>
-<title>Compositeness Processes</title>
-<link rel="stylesheet" type="text/css" href="pythia.css"/>
-<link rel="shortcut icon" href="pythia32.gif"/>
-</head>
-<body>
-
-<h2>Compositeness Processes</h2>
-
-Compositeness scenarios may give rise to sharp resonances of excited
-quarks and leptons. An excited copy of the first generation is
-implemented, consisting of spin 1/2 particles. The possibility of
-contact interactions between SM fermions is also implemented in the
-context of <i>2 -> 2</i> quark or fermion-lepton scattering.
-
-<p/>
-Related to excited fermions, the current implementation contains gauge
-interaction production by quark-gluon fusion or lepton-photon fusion
-and contact interaction production by quark-quark or quark-antiquark
-scattering. For both the <i>2 -> 1</i> and <i>2 -> 2</i> processes
-a non-trivial angular dependence is included in the decay, however,
-only decays into gauge bosons are supported, i.e. not decays through
-contact interactions. In additions to the compositness scale and couplings
-listed below, you are expected to change the excited-fermion masses in
-accordance with what is desired. See [<a href="Bibliography.html" target="page">Bau90</a>] for conventions.
-
-<p/>
-The contact interactions are implemented according to [<a href="Bibliography.html" target="page">Eic83</a>].
-The processes include the SM contributions as well as interference.
-For this reason the processes below converge toward the SM equivalents
-when the contact interaction contributions are close to zero, e.g.
-<code>HardQCD:qq2qq</code> and <code>HardQCD:qqbar2qqbarNew</code> in
-the case of quark scattering.
-
-<h3>Excited fermions, production processes</h3>
-
-A few different production processes have been implemented, which normally
-would not overlap and therefore could be run together.
-
-<p/><code>flag </code><strong> ExcitedFermion:all </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Common switch for the group of implemented processes that produce an
-excited fermion.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:dg2dStar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>d g -> d^*</i>.
-Code 4001.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:ug2uStar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>u g -> u^*</i>.
-Code 4002.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:sg2sStar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>s g -> s^*</i>.
-Code 4003.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:cg2cStar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>c g -> c^*</i>.
-Code 4004.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:bg2bStar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>b g -> b^*</i>.
-Code 4005.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:egm2eStar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>e gamma -> e^*</i>.
-Code 4011.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:mugm2muStar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>mu gamma -> mu^*</i>.
-Code 4013.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:taugm2tauStar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>tau gamma -> tau^*</i>.
-Code 4015.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:qq2dStarq </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q q(bar) -> d^* q(bar)</i>.
-Code 4021.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:qq2uStarq </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q q(bar) -> u^* q(bar)</i>.
-Code 4022.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:qq2sStarq </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q q(bar) -> s^* q(bar)</i>.
-Code 4023.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:qq2cStarq </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q q(bar) -> c^* q(bar)</i>.
-Code 4024.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:qq2bStarq </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q q(bar) -> b^* q(bar)</i>.
-Code 4025.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:qqbar2eStare </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q qbar -> e^*+- e^-+</i>.
-Code 4031.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:qqbar2nueStarnue </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q qbar -> nu_e^* nu_ebar</i>.
-Code 4032.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:qqbar2muStarmu </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q qbar -> mu^*+- mu^-+</i>.
-Code 4033.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:qqbar2numuStarnumu </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q qbar -> nu_mu^* nu_mubar</i>.
-Code 4034.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:qqbar2tauStartau </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q qbar -> tau^*+- tau^-+</i>.
-Code 4035.
-
-
-<p/><code>flag </code><strong> ExcitedFermion:qqbar2nutauStarnutau </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q qbar -> nu_tau^* nu_taubar</i>.
-Code 4036.
-
-
-<h3>Excited fermions, parameters</h3>
-
-The basic couplings of the model are
-
-<p/><code>parm </code><strong> ExcitedFermion:Lambda </strong>
- (<code>default = <strong>1000.</strong></code>; <code>minimum = 100.</code>)<br/>
-Compositeness scale <i>Lambda</i> in GeV.
-
-
-<p/><code>parm </code><strong> ExcitedFermion:coupF </strong>
- (<code>default = <strong>1.0</strong></code>; <code>minimum = 0.0</code>)<br/>
-Strength <i>f</i> of the <i>SU(2)</i> coupling.
-
-
-<p/><code>parm </code><strong> ExcitedFermion:coupFprime </strong>
- (<code>default = <strong>1.0</strong></code>; <code>minimum = 0.0</code>)<br/>
-Strength <i>f'</i> of the <i>U(1)</i> coupling.
-
-
-<p/><code>parm </code><strong> ExcitedFermion:coupFcol </strong>
- (<code>default = <strong>1.0</strong></code>; <code>minimum = 0.0</code>)<br/>
-Strength <i>f_c</i> of the <i>SU(3)</i> coupling.
-
-
-<h3>Contact interactions, production processes</h3>
-
-The processes including contact interactions are
-
-<p/><code>flag </code><strong> ContactInteractions:QCqq2qq </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q q -> q q</i> including contact interactions.
-Code 4201.
-
-
-<p/><code>flag </code><strong> ContactInteractions:QCqqbar2qqbar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q qbar -> q' qbar'</i> including contact interactions.
-Code 4202.
-
-
-<p/><code>flag </code><strong> ContactInteractions:QCffbar2eebar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>f fbar -> e- e+</i> including contact interactions.
-Code 4203.
-
-
-<p/><code>flag </code><strong> ContactInteractions:QCffbar2mumubar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>f fbar -> mu- mu+</i> including contact interactions.
-Code 4204.
-
-
-<p/><code>flag </code><strong> ContactInteractions:QCffbar2tautaubar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>f fbar -> tau- tau+</i> including contact interactions.
-Code 4205.
-
-
-<h3>Contact interactions, parameters</h3>
-
-<p/><code>mode </code><strong> ContactInteractions:nQuarkNew </strong>
- (<code>default = <strong>3</strong></code>; <code>minimum = 0</code>; <code>maximum = 5</code>)<br/>
-Number of allowed outgoing new quark flavours in the above
-<i>q qbar -> q' qbar'</i> process. Similar to <i>HardQCD:nQuarkNew</i>
-for the QCD processes.
-
-
-<p/><code>parm </code><strong> ContactInteractions:Lambda </strong>
- (<code>default = <strong>1000.</strong></code>; <code>minimum = 100.</code>)<br/>
-Compositeness scale <i>Lambda</i> in GeV.
-
-
-<p/><code>mode </code><strong> ContactInteractions:etaLL </strong>
- (<code>default = <strong>0</strong></code>; <code>minimum = -1</code>; <code>maximum = 1</code>)<br/>
-Helicity parameter.
-<br/><code>option </code><strong> 1</strong> :
-<br/><code>option </code><strong> 0</strong> :
-<br/><code>option </code><strong> -1</strong> :
-
-
-<p/><code>mode </code><strong> ContactInteractions:etaRR </strong>
- (<code>default = <strong>0</strong></code>; <code>minimum = -1</code>; <code>maximum = 1</code>)<br/>
-Helicity parameter.
-<br/><code>option </code><strong> 1</strong> :
-<br/><code>option </code><strong> 0</strong> :
-<br/><code>option </code><strong> -1</strong> :
-
-
-<p/><code>mode </code><strong> ContactInteractions:etaLR </strong>
- (<code>default = <strong>0</strong></code>; <code>minimum = -1</code>; <code>maximum = 1</code>)<br/>
-Helicity parameter.
-<br/><code>option </code><strong> 1</strong> :
-<br/><code>option </code><strong> 0</strong> :
-<br/><code>option </code><strong> -1</strong> :
-
-
-</body>
-</html>
-
-<!-- Copyright (C) 2012 Torbjorn Sjostrand -->
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff