Test of CPT and Lorentz symmetry in entangled neutral kaons with the KLOE experiment

Babusci, D.; Balwierz-Pytko, I.; Bencivenni, G.; Bloise, C.; Bossi, F.; Branchini, P.; Budano, A.; Balkeståhl, L. Caldeira; Capon, G.; Ceradini, F.; Ciambrone, P.; Curciarello, F.; Czerwiński, E.; Dané, E.; Leo, V. De; Lucia, E. De; Robertis, G. De; Santis, A. De; Simone, P. De; Cicco, Alessandro Di; Domenico, A. Di; Donato, C. Di; Salvo, R. Di; Domenici, D.; Erriquez, O.; Fanizzi, G.; Fantini, A.; Felici, G.; Fiore, S.; Franzini, P.; Gajos, A.; Gauzzi, P.; Giardina, G.; Giovannella, S.; Graziani, E.; Happacher, F.; Heijkenskjöld, L.; Höistad, B.; Jacewicz, M.; Johansson, T.; Kacprzak, K.; Kamińska, D.; Kupść, A.; Lee‐Franzini, J.; Loddo, F.; Loffredo, S.; Mandaglio, G.; Martemianov, M.; Martini, M.; Mascolo, M.; Messi, R.; Miscetti, S.; Morello, G.; Moricciani, D.; Moskal, P.; Nguyen, F.; Palladino, A.; Passeri, A.; Patera, V.; Longhi, I. Prado; Ranieri, A.; Santangelo, P.; Sarra, I.; Schioppa, M.; Sciascia, B.; Silarski, M.; Taccini, C.; Tortora, L.; Venanzoni, G.; Wiślicki, W.; Wolke, M.; Zdebik, J.

doi:10.1016/j.physletb.2014.01.026

Cited by 75 publications

(60 citation statements)

References 24 publications

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“…We find no significant evidence for CPT-violating effects and place limits on the size of the Lorentz violating effects, ∆a µ . These limits constrain a linear combination of the Lorentz-violating coupling constants a q µ for the b and s valence quarks in the B 0 s meson that are different from the linear combinations of valence quarks in the B 0 [11] or K 0 [9] mesons, and therefore further constrain the possible separate values of the three coefficients a b µ , a s µ , and a d µ . We find 95% confidence intervals for the flavor-dependent coefficients ∆a ⊥ < 1.2×10 −12 GeV and (−0.8 < ∆a T − 0.396∆a Z < 3.9) × 10 −13 GeV.…”

Section: And D ±mentioning

confidence: 99%

Search for Violation ofCPTand Lorentz Invariance inBs0Meson Oscillations

Abazov¹,

Abbott²,

Acharya³

et al. 2015

Phys. Rev. Lett.

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We present the first search for CPT-violating effects in the mixing of B 0 s mesons using the full Run II data set with an integrated luminosity of 10.4 fb −1 of proton-antiproton collisions collected using the D0 detector at the Fermilab Tevatron Collider. We measure the CPT-violating asymmetry in the decay B 0 s → µ ± D ± s as a function of celestial direction and sidereal phase. We find no evidence for CPT-violating effects and place limits on the direction and magnitude of flavor-dependent CPTand Lorentz-invariance violating coupling coefficients. We find 95% confidence intervals of ∆a ⊥ < 1.2 × 10 −12 GeV and (−0.8 < ∆aT − 0.396∆aZ < 3.9) × 10 −13 GeV.PACS numbers: 11.30. Cp, 13.20.He, 14.40.Nd Lorentz invariance requires that the description of a particle is independent of its direction of motion or boost velocity. The Standard Model Extension (SME) [1] provides a framework for potential Lorentz and CPT invariance violation (CPTV), suggesting that such violations can occur at the Planck scale but still result in potentially observable effects at currently available collider energies. The process of neutral meson oscillations is described by a 2 × 2 effective Hamiltonian with mass eigenvalues of the propagating particles having very small differences between them that drive the oscillation probability. For the B 0 s -B 0 s system, the fractional difference between the eigenvalues is of the order of 10 −12 . Due to this, B 0 s -B 0 s oscillations form an interferometric system that is very sensitive to small couplings between the valence quarks and a possible Lorentz-invariance violating field, making it an ideal place to search for new physics [2]. The measurement of the like-sign dimuon asymmetry by the D0 Collaboration [3] shows evidence of anomalously large CP-violating effects. This is currently one of the few significant deviations from the standard model of particle physics. One of the interpretations of this effect could be a CPT-invariant CP violation (CPV) in neutral B-meson mixing. The propagating "light" (L) and "heavy" (H) mass eigenvalues of the B 0 s -B 0 s system can be written as [4]:If the complex parameter ξ s is zero, CPT is conserved and CPV is due to |q/p| = 1 so that the oscillation probability). An alternative interpretation is that the asymmetry could arise from T-invariant CPV in B 0 s -B 0 s mixing [5] where |q/p| = 1, but ξ s is non-zero so that the probability of non-oscillation or oscillation back to the original state where ∆a µ is a four vector direction and magnitude in space-time characterizing Lorentz-invariance violation which in the SME is given by ∆a µ = r s a s µ −r b a b µ where a q µ are Lorentz-violating coupling constants for the two valence quarks in the B 0 s meson, and where the factors r q allow for quark-binding or other normalization effects. The four-velocity of the B 0 s meson is given by β µ = γ(1, β), β µ ∆a µ is the difference between the diagonal elements of the effective Hamiltonian, and the mass and decay rate differences of the mass eigenstates are...

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Section: And D ±mentioning

confidence: 99%

Search for Violation ofCPTand Lorentz Invariance inBs0Meson Oscillations

Abazov¹,

Abbott²,

Acharya³

et al. 2015

Phys. Rev. Lett.

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“…Using 1.7 fb −1 of data collected at KLOE and studying the interference pattern of the entangled neutral kaon pairs in the φ → K 0K0 → π + π − π + π − final state, as a function of sidereal time and particle direction in celestial coordinates, the following results have been obtained 25 :…”

Section: Cpt and Lorentz Symmetry Testsmentioning

confidence: 99%

CPT symmetry, quantum gravity, and entangled neutral K mesons

Domenico¹

2017

The Fourteenth Marcel Grossmann Meeting

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CP T appears as the only inversion symmetry transformation under which the laws of nature are strictly invariant. This fact has a very solid theoretical ground in the CP T theorem, and any violation of the CP T symmetry would unambiguously represent a signal of a New Physics framework. The entangled neutral kaon system at a φ-factory offers a unique possibility to perform a variety of fundamental tests of CP T invariance, as well as of the basic principles of quantum mechanics. The KLOE experiment at the DAΦNE collider put stringent limits on several kinds of possible CP T violation and decoherence mechanisms, which might be justified in a quantum gravity framework. No deviation from the expectations of quantum mechanics and CP T symmetry is observed, while the extreme precision of the measurements, in some cases, reaches the interesting Planck scale region. At present the KLOE-2 experiment is collecting data with an upgraded detector with the aim of significantly improve this kind of experimental tests.

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“…By studying the ∆t interference pattern of the entangled neutral kaon pairs in the decay channel φ → K S K L → π + π − π + π − , as a function of sidereal time and particle direction in celestial coordinates, the KLOE collaboration obtained the following results [29]: ∆a 0 = (−6.0 ± 7.7 stat ± 3.1 syst ) × 10 −18 GeV, ∆a X = ( 0.9 ± 1.5 stat ± 0.6 syst ) × 10 −18 GeV,…”

Section: Cpt-and Lorentz-symmetry Testsmentioning

confidence: 99%

Precision tests of CPT symmetry and Quantum coherence with entangled neutral K

Domenico¹

2017

Proceedings of Corfu Summer Institute 2016 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2016)

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The neutral kaon system at a φ -factory offers a unique possibility to perform fundamental tests of CPT invariance, as well as of the basic principles of quantum mechanics. The most recent and significant limits on CPT violation are reviewed, including the ones related to possible decoherence mechanisms or Lorentz symmetry breaking, which might be induced in a quantum gravity scenario. The present experimental results show no deviations from the expectations of quantum mechanics and CPT symmetry, while the accuracy in some cases reaches the interesting Planck scale region. The KLOE-2 experiment, presently taking data at the DAΦNE facility, will further improve these results.

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Test of CPT and Lorentz symmetry in entangled neutral kaons with the KLOE experiment

Cited by 75 publications

References 24 publications

Search for Violation ofCPTand Lorentz Invariance inBs0Meson Oscillations

Search for Violation ofCPTand Lorentz Invariance inBs0Meson Oscillations

CPT symmetry, quantum gravity, and entangled neutral K mesons

Precision tests of CPT symmetry and Quantum coherence with entangled neutral K

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