The neutral kaon decays to 
                
$\pi^+ \pi^- \pi^0$
              : a detailed analysis of the CPLEAR data

Angelopoulos, A.

doi:10.1007/s100529800974

Cited by 99 publications

(215 citation statements)

References 15 publications

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“…We may recall that CP violation was first observed in the K 0 -K 0 system [2], and is now being actively searched for in the B 0 d -B 0 d system [3]; there are also observations of T violation [4] and tests of CPT invariance [5] in the K 0 -K 0 system, although their interpretation remains controversial [6].…”

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confidence: 99%

Testing CPT invariance by using C-even neutral-meson-antimeson correlated states

Dass

Grimus

Lavoura³

2001

J. High Energy Phys.

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We consider the decays of a correlated neutral-meson-antimeson state with Cparity +1. We show that there is CPT noninvariance in the mixing of the neutral mesons if, for any two decay modes f and g, the decay rate has a component R A which is antisymmetric under the interchange of the decay times t 1 and t 2 . In particular, one may cleanly extract the CPT-noninvariance parameter with the help of R A by using opposite-sign dilepton events.

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confidence: 99%

Testing CPT invariance by using C-even neutral-meson-antimeson correlated states

Dass

Grimus

Lavoura³

2001

J. High Energy Phys.

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“…Recently, time-reversal violation (TV) has been measured experimentally in the K 0 system [1], and thus complements the information on CP violation (CPV) that has been steadily accumulating for the past thirty seven years. The data is in accordance with the CPT theorem which is fundamental to local quantum field theories with Lorentz invariance and the usual spin-statistics connection.…”

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confidence: 85%

T violation in Γb → Γl+l− decays

Chen

Geng

2003

Nuclear Physics B - Proceedings Supplements

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We examine the T-odd transverse lepton and Λ polarizations in the baryonic decays of Λ b → Λl + l − (l = e , µ) to study the T violating effects. We show that the lepton polarizations are suppressed but the Λ ones can be as large as 50% in CP violating theories beyond the standard model such as the SUSY models, which can be tested in various future hadron colliders.Recently, time-reversal violation (TV) has been measured experimentally in the K 0 system [1], and thus complements the information on CP violation (CPV) that has been steadily accumulating for the past thirty seven years. The data is in accordance with the CPT theorem which is fundamental to local quantum field theories with Lorentz invariance and the usual spin-statistics connection. However, the origin of the violation remains unclear. In the standard model, CPV or TV arises from a unique physical phase in the Cabibbo-Kobayashi-Maskawa (CKM) quark mixing matrix [2]. This paradigm also predicts CPV effect in the b-quark system. To test the accuracy of this paradigm and to search for other sources of CPV one needs to look for new processes. Indeed this is an important quest of the B-factories. In addition we deem it particularly interesting if the time reversal symmetry violation can be directly detected in the b-system rather than inferring it as a consequence of CPT invariance. In this talk, we will present our recent studies on T violation in the baryonic decays of Λ b → Λl + l − (l = e, µ) [3,4,5,6].It is known that for a general three-body decay * Talk presented by C.Q. Geng at the 5th International Conference on Hyperons, Charm and Beauty Hadrons of a baryon the triple spin-momentum correlations, such as s k ·( p i × p j ), are T-odd observables, where s k and p i,j are the spin and momentum vectors of the final particles, respectively. There are a number of different sources that might give rise to these T-odd observables. The most important ones being the weak CPV such as the CKM phase of the SM. However, final state interactions such as QCD for non-leptonic decays or the electromagnetic (EM) interaction among the final state particles can also make contributions. These are usually less interesting and they could even hide the signals from the weak CPV. We note that the T-odd triple correlations do not need nonzero strong phases unlike some of CP violating observables, such as the rate asymmetry between a particle and its antiparticle. In Λ b → Λl + l − decays, we can use either the polarization of the lepton (s l ) or the Λ baryon (s Λ ) to study the Todd correlations. It is interesting to note that the decays can be used to analyze the helicity structure of the interaction, which is impossible in the B meson system.We start with the effective Hamiltonian for b → sl + l − by including the right-handed couplings in

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“…See [35], as well as [23,39], with [36] and [40], for a justification of the neglect of the other decay modes . (In Eq.…”

Section: Decays To Two Pions -With Focus On Cpt Invariancementioning

confidence: 99%

“…The other processes enter with the reduction factor Γ S / Γ L ≈ 580, and, given their abundances, can often be neglected [23,36,40]. What remains of the sum, is approximately Γ S η ππ , with η ππ defined by…”

Section: Unitaritymentioning

confidence: 99%

“…We remark that CPT invariance imposes no restrictions on the off-diagonal elements, and that T invariance imposes no restrictions on the diagonal elements of Λ . CP invariance is violated, whenever one, at least, of these invariances is The last column indicates asymmetries of quantities which have been measured by the CPLEAR experiment [23] at CERN. More explanations are given in the text.…”

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confidence: 99%

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Plate with a hole obeys the averaged null energy condition

Graham

Olum

2005

Phys. Rev. D

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During the recent years experiments with neutral kaons have yielded remarkably sensitive results which are pertinent to such fundamental phenomena as CPT invariance (protecting causality), timereversal invariance violation, coherence of wave functions, and entanglement of kaons in pair states. We describe the phenomenological developments and the theoretical conclusions drawn from the experimental material. An outlook to future experimentation is indicated.

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The neutral kaon decays to $\pi^+ \pi^- \pi^0$ : a detailed analysis of the CPLEAR data

Abstract: The neutral kaon decays to + 0 : a detailed analysis of the CPLEAR data CPLEAR Collaboration

Cited by 99 publications

References 15 publications

Testing CPT invariance by using C-even neutral-meson-antimeson correlated states

Testing CPT invariance by using C-even neutral-meson-antimeson correlated states

T violation in Γb → Γl+l− decays

Plate with a hole obeys the averaged null energy condition

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