Changes between Version 1 and Version 2 of VBF


Ignore:
Timestamp:
Apr 6, 2012, 4:33:02 PM (13 years ago)
Author:
trac
Comment:

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  • VBF

    v1 v2  
    129129==== libintf_15.f ====
    130130
    131 The file libintf_15.f contains the LO interferences between the VBF-like diagrams (eg. ud->udh, uu->uuh) as well as the interferences between VBF and S-channel (udbar->udbarh). It as been checked with Madgraph point by point in the phase space and at the integrated level.
     131The file libintf_15.f contains the LO interferences between the VBF-like diagrams (eg. ud->udh, uu->uuh) as well as the interferences between VBF and S-channel (udbar->udbarh). It as been checked with Madgraph point by point in the phase space and at the integrated level.
    132132
    133133The interference impact is at the per-mille level or less at 14 TeV
    … …  
    142142      * See paper by Jeppe, Thomas, and Jennifer: ["http://arxiv.org/abs/0709.3513"]
    143143   * top quark effects:
    144       * In particular we neglect diagrams including a top box coupled to two gluons, a Z and the higgs, and their interference with diagrams included in our calculation. Those diagrams are suppressed in the mt->infty limit. However, this contribution can be substantial at the LHC. (See for example [http://arxiv.org/abs/hep-ph/0307206 Brein, Djouadi, Harlander]), and have been computed in this work by [http://dx.doi.org/10.1103/PhysRevD.42.2253 Kniehl] (see also attachment kniehl.pdf)
     144      * In particular we neglect diagrams including a top box coupled to two gluons, a Z and the higgs, and their interference with diagrams included in our calculation. Those diagrams are suppressed in the mt->infty limit. However, this contribution can be substantial at the LHC. (See for example [http://arxiv.org/abs/hep-ph/0307206 Brein, Djouadi, Harlander]), and have been computed in this work by [http://dx.doi.org/10.1103/PhysRevD.42.2253 Kniehl] (see also attachment kniehl.pdf)
    145145      *
    146    * b quark initiated charged current processes (i.e. no b->c, b->u mixing). Since b->u << b->c, we just need to check the effect of the latter. Being totally inclusive, we already take into account CKM mixing for the other flavours
     146   * b quark initiated charged current processes (i.e. no b->c, b->u mixing). Since b->u << b->c, we just need to check the effect of the latter. Being totally inclusive, we already take into account CKM mixing for the other flavours
    147147   * interferences beyond LO (ok if interferences are already small)
    148    * Non DY-like diagrams in the s-channel (related to top quark effects, ex. gg-&gt;VH via top box or triangle, (see above)
    149    * ||s-ch||^2 -&gt; branching ratio into hadrons: we should understand if take the experimental value, or the fixed order QCD computation
     148   * Non DY-like diagrams in the s-channel (related to top quark effects, ex. gg->VH via top box or triangle, (see above)
     149   * ||s-ch||^2 -> branching ratio into hadrons: we should understand if take the experimental value, or the fixed order QCD computation
    150150
    151151-- Main.MarcoZaro - 2009-12-18
    … …  
    178178   * [attachment:vbf_20.tar vbf_20.tar]: the 2.0 version of the vbf code
    179179
    180    * [attachment:kniehl.pdf kniehl.pdf]: knihel paper about pp-&gt;ZH @NNLO
     180   * [attachment:kniehl.pdf kniehl.pdf]: knihel paper about pp->ZH @NNLO
    181181
    182182   * [attachment:vbf_20.tar vbf_20.tar]: the 2.0 version of the vbf code
    … …  
    225225
    226226
     227