Welcome to the web site of the Collaboration

• 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>
</ul>

<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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   Highlights

29/08/2023: Fit results section updated with summer 2022 update (summer 2023 soon to arrive).

21/09/2018: Fit results section updated with summer 2018 update.

16/09/2016: Fit results section updated with summer 2016 update presented at ICHEP'16.

01/07/2014: Fit results section updated with pre-ICHEP 2014 measurements.

12/09/2013: Fit results section updated with post-EPS 2013 measurements.

15/03/2013: Fit results section updated with pre-Moriond 2013 measurements.

03/07/2012: Fit results section updated with pre-ICHEP 2012 measurements.

25/04/2012: Fit results section updated with PDG 2012 inputs.

04/12/2011: Fit results section updated with post-LP 2011 measurements.

23/07/2010: First release of the new web site. Fit results section updated with pre-ICHEP 2010 measurements. Old web site is still available here.

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<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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