This is the main web site of the UTfit Collaboration

Brief description of UTfit aims....

• Combine all available measurements of CP violation and rare decays in the flavour sector into a global Unitarity Triangle fit


• Check the validity of the CKM mechanism in the Standard Model and determine accurately the parameters of the CKM matrix


• Look for indirect effects of New Physics and put stringent bounds on relevant New Physics parameters


• Compare the values of hadronic parameters obtained from the Unitarity Triangle fits with theoretical predictions from Lattice QCD

<ul class="benefits">
<li id="benefitsCombine">Combine all available measurements of <b>%RED%CP violation%ENDCOLOR%</b> and <b>%RED%rare decays%ENDCOLOR%</b> in the flavour sector into a <b>%RED%global Unitarity Triangle fit%ENDCOLOR%</b></li><br><li id="benefitsCheck">Check the validity of the <b>%RED%CKM mechanism%ENDCOLOR%</b> in the Standard Model and determine accurately the <b>%RED%parameters of the CKM matrix%ENDCOLOR%</b></li><br><li  id="benefitsNP">Look for <b>%RED%indirect effects of New Physics%ENDCOLOR%</b> and put stringent bounds on relevant <b>%RED%New Physics parameters%ENDCOLOR%</b></li><br><li id="benefitsLQCD">Compare the values of <b>%RED%hadronic parameters%ENDCOLOR%</b> obtained from the Unitarity Triangle fits with theoretical predictions from <b>%RED%Lattice QCD%ENDCOLOR%</b></li>
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<img width="320" alt="rho eta UTfit animation" src="%PUBURL%/UTfit/repository/system/ckm.gif" height="320" hspace="60px" vspace="0px" />
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---++ UTfit news
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          <b>17/12/2008:</b> completed the summer08 update of the sites. Starting the winter09 update %BR%
          <b>05/03/2008:</b> released arXiv:0803.0659 [hep-ph], First evidence of New Physics in Bs sector %BR%
          <b>04/07/2007:</b> released arXiv:0707.0636 [hep-ph] on the "Model-independent constraints on Delta F=2 operators and the scale of New Physics" %BR%
          <b>25/04/2007:</b> website updated, including winter '07 new results and  the following improvements: sin2&#946; from B0&#8594;J/&#968;K0 only, including the theoretical error &#945; from B&#8594;&#960;&#960; and B&#8594;&#961;&#961; using the improved isospin analysis &#945; from B&#8594;&#961;&#960; using CPS approach %BR%
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<li id="benefitsEditor">World class <b>text editor built in</b>, so that you get what you see</li><li id="benefitsDynamic">Create <b>dynamic pages</b>: status boards, to-do lists, inventory systems, employee handbooks, bug trackers and much more</li><li id="benefitsLayouts"><b>Customize the layout</b> of the site, or per page, user or group</li><li id="benefitsExtensions">Over <b>200 polished extensions, all actively maintained,</b> to expand the out of the box functions</li><li id="benefitsCompatible">Compatible with TWiki, including a seamless migration path</li><li id="benefitsCommunity"><b>Free, friendly, and effective community-based support</b> by a community dedicated to democracy</li>
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