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Sehgal, L.M.; Leusen, Jan van

doi:10.1103/physrevlett.83.4933

Cited by 25 publications

(50 citation statements)

References 11 publications

(16 reference statements)

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“…We discuss this result here, because its interpretation as a genuine example of a time-reversal noninvariance [54], or as a first direct observation of a time asymmetry in neutral kaon decay [55] has triggered critical comments [27,30,32,56], with the concurring conclusion that, in the absence of final state interactions, the KTEV experiment at FNAL would find the same asymmetry when we assume there is no T violation [32].…”

Section: Time Reversal Invariance In the Decay To ππEmentioning

confidence: 87%

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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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Section: Time Reversal Invariance In the Decay To ππEmentioning

confidence: 87%

“…As a complement, we wish to show that the model of [54] is an example, that a T odd effect may well persist within T invariance, even in the absence of final state interactions.…”

Section: Time Reversal Invariance In the Decay To ππEmentioning

confidence: 99%

Plate with a hole obeys the averaged null energy condition

Graham

Olum

2005

Phys. Rev. D

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“…Those vectors are even under TR; but, if we compute the cosine and the sine of their azimutal angles, φ (ni) = φ nΛ , φ nV , as it was suggested by Seghal [6] and Wolfenstein [7] for the decay…”

Section: Special Anglesmentioning

confidence: 99%

Testing CP and Time Reversal Symmetries with Decays

Leitner

Ajaltouni

2007

Nuclear Physics B - Proceedings Supplements

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In this letter, an overview is given for interesting tests of both CP and Time Reversal symmetries with the beauty baryon Λ b . Extensive use of the helicity formalism and HQET is done for all calculations. Then, emphasis is put on sophisticated methods like analysis of resonance polarizations and particular angle distributions which can exhibit a clear signal of TR violation. PHYSICAL MOTIVATIONSModern Particle Physics is well described by gauge field theories which are built on fundamental principles, the most important ones being Lorentz Invariance, Unitarity and Hermiticity. An immediate consequence of these principles is the famous CPT theorem which stipulates that any physical system and its CPT-conjugate one have identical physical laws. On another side, CPT theorem supposes that, if CP symmetry is violated, Time Reversal (TR) is no longer a good symmetry and this mathematical feature represents only an indirect violation of TR symmetry. However some experiments performed recently at CERN and Fermilab have shown a clear signal of direct TR violation in the K 0K 0 system. Our aim is to demonstrate that search for direct TR violation can be performed at the LHC energies by studying the cascade decays of Λ b → ΛV, Λ → pπ, V → x + x − , x being a lepton or a pion. Our main tool is constructing Triple Product Correlations (TPC) defined by the following relations Cascade decaysThe initial laboratory frame to which Λ b polarization is referred is defined like: e 1 = p 1 /p 1 , e 3 = p1× p b | p1× p b | , e 2 = e 3 × e 1 where p 1 and p b are respectively the incident proton momentum and the produced Λ b one. Λ b being transversally polarized, its polarization value is given by P Λ b = S Λ b · e 3 . Let M i be the Λ b spin projection along e 3 axis and, λ 1 and λ 2 are respectively the helicity values of Λ and V . Conservation of total angular momentum leads to four possible values for the pair (λ 1 , λ 2 ) = (1/2, 0), (1/2, 1), (−1/2, −1), (−1/2, 0) 1

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“…where Seghal [91][92][93] predicted CPV of approximately 14 % based on K 0.002. Unit vectors aid in discussing this scenario in more detail, where…”

Section: -Odd Observables Wherementioning

confidence: 99%

“Could charm (& τ) transitions be the ‘poor princess’ providing a deeper understanding of fundamental dynamics ?” or: “Finding novel forces”

Bigi

2015

Front. Phys.

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We know that our Universe is composed of only ∼ 4.5% "known" matter; therefore, our understanding is incomplete. This can be seen directly in the case of neutrino oscillations (without even considering potential other universes). Charm quarks have had considerable impact on our understanding of known matter, and quantum chromodynamics (QCD) is the only local quantum field theory to describe strong forces. It is possible to learn novel lessons concerning strong dynamics by measuring rates around the thresholds of [QQ] states with Q = b, c. Furthermore, these states provide us with gateways towards new dynamics (ND), where we must transition from "accuracy" to "precision" eras. Finally, we can make connections with τ transitions and, perhaps, with dark matter. Charm dynamics acts as a bridge between the worlds of light-and heavy-flavor hadrons (namely, beauty hadrons), and finding regional asymmetries in many-body final states may prove to be a "game changer". There are several different approaches to achieving these goals: for example, experiments such as the Super Tau-Charm Factory, Super Beauty Factory, and the Super Z 0 Factory act as gatekeepers -and deeper thinking regarding symmetries.

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Violation of Time Reversal Invariance in the DecaysKL→π+π−

Cited by 25 publications

References 11 publications

Plate with a hole obeys the averaged null energy condition

Plate with a hole obeys the averaged null energy condition

Testing CP and Time Reversal Symmetries with Decays

“Could charm (& τ) transitions be the ‘poor princess’ providing a deeper understanding of fundamental dynamics ?” or: “Finding novel forces”

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