Search For Cpt And Lorentz Violation In B0 B0bar Oscillations With Inclusive Dilepton Events
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Search For Cpt And Lorentz Violation In B0 B0bar Oscillations With Dilepton Events
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Author :
language : en
Publisher:
Release Date : 2007
Search For Cpt And Lorentz Violation In B0 B0bar Oscillations With Dilepton Events written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
We report results of a search for CPT and Lorentz violation in B°-{bar B}° oscillations using inclusive dilepton events from 232 million [Upsilon](4S) → B{bar B} decays recorded by the BABAR detector at the PEP-II B Factory at SLAC. We find 2.8[sigma] significance, compatible with no signal, for variations in the complex CPT violation parameter z at the Earth's sidereal frequency and extract values for the quantities [Delta]a{sub {mu}} in the general Lorentz-violating standard-model extension. The spectral powers for variations in z over the frequency range 0.26 year−1 to 2.1 day−1 are also compatible with no signal.
Search For Cpt And Lorentz Violation In B0 B0bar Oscillations With Inclusive Dilepton Events
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Author : B. Aubert
language : en
Publisher:
Release Date : 2006
Search For Cpt And Lorentz Violation In B0 B0bar Oscillations With Inclusive Dilepton Events written by B. Aubert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
We report preliminary results of a search for CPT and Lorentz violation in B{sup 0}-{bar B}{sup 0} oscillations using an inclusive dilepton sample collected by the BABAR experiment at the PEP-II B Factory. Using a sample of 232 million B{bar B} pairs, we search for time-dependent variations in the complex CPT parameter z = z{sub 0} +z{sub 1} cos ({Omega}{cflx t} + {phi}) where {Omega} is the Earth's sidereal frequency and {cflx t} is sidereal time. We measure Imz{sub 0} = ( -14.1 {+-} 7.3(stat.) {+-} 2.4(syst.)) x 10{sup -3}, {Delta}{Lambda} x Rez{sub 0} = ( -7.2 {+-} 4.1(stat.) {+-} 2.1(syst.)) x 10{sup -3} ps{sup -1}, Im z{sub 1} = ( -24.0 {+-} 10.7(stat.) {+-} 5.9(syst.)) x 10{sup -3}, and {Delta}{Lambda} x Re z{sub 1} = ( -18.8 {+-} 5.5(stat.) {+-} 4.0(syst.)) x 10{sup -3} ps{sup -1}, where {Delta}{Lambda} is the difference between the decay rates of the neutral B mass eigenstates. The statistical correlation between the measurements of Imz{sub 0} and {Delta}{Lambda} x Rez{sub 0} is 76%; between Imz{sub 1} and {Delta}{Lambda} x Rez{sub 1} it is 79%. These results are used to evaluate expressions involving coefficients for Lorentz and CPT violation in the general Lorentz-violating standard-model extension. In a complementary approach, we examine the spectral power of periodic variations in z over a wide range of frequencies and find no significant signal.
Search For T Cp And Cpt Violation In B0 B0bar Mixingwith Inclusive Dilepton Events
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Author :
language : en
Publisher:
Release Date : 2006
Search For T Cp And Cpt Violation In B0 B0bar Mixingwith Inclusive Dilepton Events written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
The authors report the results of a search for T, CP and CPT violation in B°-{bar B}° mixing using an inclusive dilepton sample collected by the BABAR experiment at the PEP-II B Factory. Using a sample of 232 million B{bar B} pairs, with a simultaneous likelihood fit of the same-sign and opposite-sign dileptons, they measure the T and Cp violation parameter
Search For T And Cp Violation In B0 B0bar Mixing With Inclusive Dileptons Events
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Author :
language : en
Publisher:
Release Date : 2003
Search For T And Cp Violation In B0 B0bar Mixing With Inclusive Dileptons Events written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
The authors report the results of a search for T and CP violation in B[sup 0]-[bar B][sup 0] mixing using an inclusive dilepton sample collected by the BABAR experiment at the PEP-II B Factory. The asymmetry between[ell][sup+][ell][sup+] and[ell][sup -][ell][sup -] events allows the authors to compare the probabilities for[bar B][sup 0][yields] B[sup 0] and B[sup 0][yields][bar B][sup 0] oscillations and thus probe T and CP invariance. Using a sample of 23 million B[bar B] pairs, they measure a same-sign dilepton asymmetry of A[sub T/CP]= (0.5[+-] 1.2(stat)[+-] 1.4(syst))%. For the modulus of the ratio of complex mixing parameters p and q, they obtainq/p= 0.998[+-] 0.006(stat)[+-] 0.007(syst).
Study Of T And Cp Violation In B Sup 0 Anti B Sup 0 Mixing With Inclusive Dilepton Events
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Author :
language : en
Publisher:
Release Date : 2001
Study Of T And Cp Violation In B Sup 0 Anti B Sup 0 Mixing With Inclusive Dilepton Events written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
We report a study of T and CP violation in B[sup 0][bar B][sup 0] mixing using an inclusive dilepton sample collected by the BABAR experiment at the PEP-II B Factory. The asymmetry between[ell][sup+][ell][sup+] and[ell][sup -][ell][sup -] allows us to compare the probabilities for[bar B][sup 0][yields] B[sup 0] and B[sup 0][yields][bar B][sup 0] oscillations and thus probe T and CP invariance. A sample of 20,381 same-sign dilepton events is selected in the 1999--2000 data sample, corresponding to an integrated luminosity of 20.7 fb[sup -1] on the[Upsilon](4S) resonance. We measure a same-sign dilepton asymmetry of A[sub T]= (0.5[+-] 1.2[+-] 1.4)%; for the parameter[epsilon][sub B] representing T and CP violations in mixing, we obtain a preliminary result of Re([epsilon][sub B])/1+[epsilon][sub B][sup 2]= (1.2[+-] 2.9[+-] 3.6) x 10[sup -3].
Study Of T And Cp Violation In B Anti B Mixing With Inclusive Dilepton Events
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Author :
language : en
Publisher:
Release Date : 2001
Study Of T And Cp Violation In B Anti B Mixing With Inclusive Dilepton Events written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
We report a study of T and CP violation in B°{bar B}° mixing using an inclusive dilepton sample collected by the BABAR experiment at the PEP-II B Factory. The asymmetry between ll and l−l− allows us to compare the probabilities for {bar B}° 2!B° and B° 2!{bar B}° oscillations and thus probe T and CP invariance. A sample of 20,381 same-sign dilepton events is selected in the 1999--2000 data sample, corresponding to an integrated luminosity of 20.7 fb−1 on the [Upsilon](4S) resonance. We measure a same-sign dilepton asymmetry of A{sub T} = (0.5 ± 1.2 ± 1.4)%; for the parameter [epsilon]{sub B} representing T and CP violations in mixing, we obtain a preliminary result of Re([epsilon]{sub B})/1 +
Study Of Cp Asymmetry In B0 B0bar Mixing With Inclusive Dilepton Events
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Author :
language : en
Publisher:
Release Date : 2014
Study Of Cp Asymmetry In B0 B0bar Mixing With Inclusive Dilepton Events written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Search For Cpt Violation In B0 B0bar Oscillations With Babar
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Author :
language : en
Publisher:
Release Date : 2008
Search For Cpt Violation In B0 B0bar Oscillations With Babar written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Measurement Of The Time Dependence Of B0 B0 Bar Oscillations Using Inclusive Dilepton Events
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Author :
language : en
Publisher:
Release Date : 2000
Measurement Of The Time Dependence Of B0 B0 Bar Oscillations Using Inclusive Dilepton Events written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.