Search For Cpt And Lorentz Violation In B0 B0bar Oscillations With Inclusive Dilepton Events PDF Download
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| Author | : B. Aubert |
| Publisher | : |
| Total Pages | : 19 |
| Release | : 2006 |
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| ISBN | : |
Download Search for CPT and Lorentz Violation in B0-B0bar Oscillations with Inclusive Dilepton Events Book in PDF, ePub and Kindle
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.
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| Total Pages | : 7 |
| Release | : 2007 |
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Download Search for CPT and Lorentz Violation in B0-B0bar Oscillations with Dilepton Events Book in PDF, ePub and Kindle
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.
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| Release | : 2003 |
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Download Search for T and CP Violation in B0-B0bar Mixing with Inclusive Dileptons Events Book in PDF, ePub and Kindle
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).
| Author | : Lehnert Ralf |
| Publisher | : World Scientific |
| Total Pages | : 264 |
| Release | : 2020-04-04 |
| Genre | : Science |
| ISBN | : 9811213992 |
Download Cpt And Lorentz Symmetry - Proceedings Of The Eighth Meeting On Cpt And Lorentz Symmetry Book in PDF, ePub and Kindle
| Author | : |
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| Total Pages | : 5 |
| Release | : 2008 |
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Download Search for CPT Violation in B0-B0bar Oscillations with BABAR. Book in PDF, ePub and Kindle
| Author | : |
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| Total Pages | : 18 |
| Release | : 2001 |
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Download Study of T and CP Violation in B°-anti-B° Mixing with Inclusive Dilepton Events Book in PDF, ePub and Kindle
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 +
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| Release | : 2001 |
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Download Study of T and CP Violation in B[sup 0]-anti-B[sup 0] Mixing with Inclusive Dilepton Events Book in PDF, ePub and Kindle
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].
| Author | : John Collins |
| Publisher | : Cambridge University Press |
| Total Pages | : 637 |
| Release | : 2011-04-28 |
| Genre | : Science |
| ISBN | : 1139500627 |
Download Foundations of Perturbative QCD Book in PDF, ePub and Kindle
Giving an accurate account of the concepts, theorems and their justification, this book is a systematic treatment of perturbative QCD. It relates the concepts to experimental data, giving strong motivations for the methods. Ideal for graduate students starting their work in high-energy physics, it will also interest experienced researchers.
| Author | : Frieder Lenz |
| Publisher | : Springer |
| Total Pages | : 763 |
| Release | : 1997-10-15 |
| Genre | : Science |
| ISBN | : 9783540634423 |
Download Lectures on QCD Book in PDF, ePub and Kindle
The two-volume set Lectures on QCD provides an introductory overview of Quantum Chromodynamics, the theory of strong interactions. In a series of pedagogically written articles based on lectures given over the years to graduate students, the fundamentals of QCD are discussed and significant application areas are described. The field-theoretic basis of QCD is the focus of the first volume, while the application of QCD to the phenomenology of strong interactions forms the subject of the second volume.
| Author | : V Alan Kostelecky |
| Publisher | : World Scientific |
| Total Pages | : 293 |
| Release | : 2014-01-15 |
| Genre | : Science |
| ISBN | : 9814566446 |
Download Cpt And Lorentz Symmetry - Proceedings Of The Sixth Meeting Book in PDF, ePub and Kindle
This book contains the Proceedings of the Sixth Meeting on CPT and Lorentz Symmetry, held at Indiana University in Bloomington on June 17-21, 2013. The Meeting focused on tests of these fundamental symmetries and on related theoretical issues, including scenarios for possible violations.Topics covered at the meeting include searches for CPT and Lorentz violations involving: accelerator and collider experiments; atomic, nuclear, and particle decays; birefringence, dispersion, and anisotropy in cosmological sources; clock-comparison measurements; electromagnetic resonant cavities and lasers; tests of the equivalence principle; gauge and Higgs particles; high-energy astrophysical observations; laboratory tests of gravity; matter interferometry; neutrino oscillations and propagation; oscillations and decays of neutral mesons; particle-antiparticle comparisons; post-newtonian gravity in the solar system and beyond; second- and third-generation particles; space-based missions; spectroscopy of hydrogen and antihydrogen; spin-polarized matter; and time-of-flight measurements. Theoretical discussions include physical effects at the level of the Standard Model, General Relativity, and beyond; the possible origins and mechanisms for Lorentz and CPT violations; classical and quantum issues in field theory, particle physics, gravity, and string theory; and mathematical foundations including Finsler geometry.
