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-<head>
-<title>Top Processes</title>
-<link rel="stylesheet" type="text/css" href="pythia.css"/>
-<link rel="shortcut icon" href="pythia32.gif"/>
-</head>
-<body>
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-<h2>Top Processes</h2>
-
-Different ways to produce top quarks, singly or in pairs.
-
-<p/><code>flag </code><strong> Top:all </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Common switch for the group of top production.
-
-
-<p/><code>flag </code><strong> Top:gg2ttbar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>g g -> t tbar</i>.
-Code 601.
-
-
-<p/><code>flag </code><strong> Top:qqbar2ttbar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q qbar -> t tbar</i> by gluon exchange.
-Code 602.
-
-
-<p/><code>flag </code><strong> Top:qq2tq(t:W) </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>q q' -> t q''</i> by <i>t</i>-channel exchange
-of a <i>W^+-</i> boson.
-Code 603.
-
-
-<p/><code>flag </code><strong> Top:ffbar2ttbar(s:gmZ) </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>f fbar -> t tbar</i> by <i>s</i>-channel exchange
-of a <i>gamma^*/Z^0</i> boson.
-Code 604.
-
-
-<p/><code>flag </code><strong> Top:ffbar2tqbar(s:W) </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>f fbar' -> t q''</i> by <i>s</i>-channel exchange
-of a <i>W^+-</i> boson.
-Code 605.
-
-
-<p/><code>flag </code><strong> Top:gmgm2ttbar </strong>
- (<code>default = <strong>off</strong></code>)<br/>
-Scatterings <i>gamma gamma -> t tbar</i>.
-Code 606.
-
-
-<p/>
-By default top always decays to a <i>W</i> and a down-type quark.
-It is possible to switch on the <i>t -> H+ b</i> decay mode.
-Note that its partial width is calculated using the <i>tan(beta)</i>
-value stored in <code>HiggsHchg:tanBeta</code>, so that it can be used
-without having to read in a SUSY parameter file. For the <i>H+</i> to
-decay also <code>Higgs:useBSM = on</code> is necessary.
-
-</body>
-</html>
-
-<!-- Copyright (C) 2012 Torbjorn Sjostrand -->
-