A measurement of the KL-KS mass difference from the charge asymmetry in semi-leptonic kaon decays

Gjesdal, Sturla; Presser, G.; Kamae, T.; Steffen, P.; Steinberger, J.; Vannucci, F.; Wahl, H.; Eisele, F.; Filthuth, H.; Lüth, V.; Zech, G.; Kleinknecht, K.

doi:10.1016/0370-2693(74)90734-5

Cited by 37 publications

(7 citation statements)

References 3 publications

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“…The weighted average of these two experiments is [20]: ∆m LS = m L − m S = (0.5282 ± 0.0030)10 10 hs −1 . The four other experiments [21,22,23,24] are at lower energy, with p K ≈ 5 GeV, or less with a weighted average ∆m LS = (0.5322 ± 0.0018)10 10 hs −1 . A fit of equation ( 19) with the high and low energy value of ∆m LS gives : δm = (3.503 ± 0.012) × 10 −12 MeV and φδg = (8.0 ± 7.0) × 10 −22 × 90 Eav 2 , (where E av is the average energy for the high energy experiment).…”

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confidence: 99%

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Test of special relativity from K physics

1998

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A violation of Local Lorentz Invariance (VLI) and hence the special theory of relativity or a violation of equivalence principle (VEP) in the Kaon system can, in principle, induce oscillations between K 0 andK 0 . We construct a general formulation in which simultaneous pairwise diagonalization of mass, momemtum, weak or gravitational eigenstates is not assumed. We discuss this problem in a general way and point out that, as expected, the VEP and VLI contributions are indistinguishable. We then insist on the fact that VEP or VLI can occur even when CPT is conserved. A possible CP violation of the superweak type induced by VEP or VLI is introduced and discussed. We show that the general VEP mechanism (or the VLI mechanism, but not both simultaneously), with or without conserved CPT, could be clearly tested experimentally through the energy dependence of the K L − K S mass difference and of η +− , η 00 , δ. Constraints imposed by present experiments are calculated. 1

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“…The weighted average of these two experiments is [12]: ∆m LS = m L − m S = (0.5282 ± 0.0030) × 10 10 hs −1 . The four other experiments [13,14,15,16] are at lower energy, with p K ≈ 5 GeV, or less. The weighted average of these low energy experiments is ∆m LS = (0.5322 ± 0.0018) × 10 10 hs −1 .…”

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confidence: 99%

Test of special relativity from K physics

1998

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“…For the experimental value of the K L and K S mass difference we consider the CDF experiments [9,10], which were done at energies as high as 160 GeV. Although earlier low energy experiments [11,12,13] differ from these CDF values by 2 σ, a recent low energy experiment at CERN [14] gives a value close to the CDF values. Another advantage of CDF value is that it is done at higher energies.…”

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confidence: 99%

Constraints on background torsion field from K-physics

Mohanty

Sarkar

1998

Physics Letters B

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We point out that a background torsion field will produce an effective potential to the K andK with opposite signs. This allows us to constrain the background torsion field from the K L and K S mass difference, CP T violating K • andK • mass difference and the CP violating quantities ǫ and η +− . The most stringent bound on the cosmological background torsion T 0 < 10 −25 GeV comes from the direct measurement of the CP T violation.

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“…Figure taken from thesis of V.Luth, Heidelberg University (1974); a published version of this work can be found inGjesdal et al (1974). Distributions of reconstructed Kzx events, and regenerated K& m 7r events.…”

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CPsymmetry violation—the search for its origin

Cronin

1981

Rev. Mod. Phys.

119

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The greatest pleasure a sc ientist can expe r ience is to encounter an unexpected discovery. I am always astonished when a simple apparatus, designed to ask the right question of nature, receives a clear response. Our experiment, carried out with James Christenson, Val Fitch, and Rene Turlay, gave convincing evidence that the long-lived neutral K meson (K~) decayed into two charged pions, a decay mode forbidden by CI' symmetry. The forbidden decay mode was found to be

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A measurement of the KL-KS mass difference from the charge asymmetry in semi-leptonic kaon decays

Cited by 37 publications

References 3 publications

Test of special relativity from K physics

Test of special relativity from K physics

Constraints on background torsion field from K-physics

CPsymmetry violation—the search for its origin

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