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تسجيل مستخدم جديدModel Independent Search at the D0 experiment
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P. Renkel
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We present a review of global searches at the Tevatron with D0 detector. The strategy involves splitting the data from the Tevatron into many final states and looking for signs of new physics in the high $p_T$ tails of various distributions using SLEUTH algorithm. We analyzed 117 D0 final states and 5543 D0 distributions. No evidence of new physics is found. The two discrepant final states arise from detector modeling issues.
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A search for CP violation in the phase-space structures of D0 and D0bar decays to the final states K-K+pi-pi+ and pi-pi+pi+pi- is presented. The search is carried out with a data set corresponding to an integrated luminosity of 1.0fb^-1 collected in
2011 by the LHCb experiment in $pp$ collisions at a centre-of-mass energy of 7TeV. For the K-K+pi-pi+ final state, the four-body phase space is divided into 32 bins, each bin with approximately 1800 decays. The p-value under the hypothesis of no CP violation is 9.1%, and in no bin is a CP asymmetry greater than 6.5% observed. The phase space of the pi-pi+pi+pi- final state is partitioned into 128 bins, each bin with approximately 2500 decays. The $p$-value under the hypothesis of no CP violation is 41%, and in no bin is a CP asymmetry greater than 5.5% observed. All results are consistent with the hypothesis of no CP violation at the current sensitivity.
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.1fb^-1 no deviation from the standard model expectations could be found.
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