Precise measurements of direct CP violation, CPT symmetry, and other parameters in the neutral kaon system

E. Abouzaid; M. Arenton; A. R. Barker; M. Barrio; L. Bellantoni; E. Blucher; G. J. Bock; C. Bown; E. Cheu; R. Coleman; M. D. Corcoran; B. Cox; A. R. Erwin; C. O. Escobar; A. Glazov; A. Golossanov; R. A. Gomes; P. Gouffon; J. Graham; J. Hamm; Y. B. Hsiung; D. A. Jensen; R. Kessler; K. Kotera; J. Ladue; A. Ledovskoy; P. L. McBride; E. Monnier; H. Nguyen; R. Niclasen; D. G. Phillips; V. Prasad; X. R. Qi; E. J. Ramberg; R. E. Ray; M. Ronquest; A. Roodman; E. Santos; P. Shanahan; P. S. Shawhan; W. Slater; D. Smith; N. Solomey; E. C. Swallow; S. A. Taegar; P. A. Toale; R. Tschirhart; Y. W. Wah; J. Wang; H. B. White; J. Whitmore; M. J. Wilking; B. Winstein; R. Winston; E. T. Worcester; T. Yamanaka; E. D. Zimmerman; R. F. Zukanovich

doi:10.1103/PhysRevD.83.092001

Precise measurements of direct CP violation, CPT symmetry, and other parameters in the neutral kaon system

E. Abouzaid, M. Arenton, A. R. Barker, M. Barrio, L. Bellantoni, E. Blucher, G. J. Bock, C. Bown, E. Cheu, R. Coleman, M. D. Corcoran, B. Cox, A. R. Erwin, C. O. Escobar, A. Glazov, A. Golossanov, R. A. Gomes, P. Gouffon, J. Graham, J. HammY. B. Hsiung, D. A. Jensen, R. Kessler, K. Kotera, J. Ladue, A. Ledovskoy, P. L. McBride, E. Monnier, H. Nguyen, R. Niclasen, D. G. Phillips, V. Prasad, X. R. Qi, E. J. Ramberg, R. E. Ray, M. Ronquest, A. Roodman, E. Santos, P. Shanahan, P. S. Shawhan, W. Slater, D. Smith, N. Solomey, E. C. Swallow, S. A. Taegar, P. A. Toale, R. Tschirhart, Y. W. Wah, J. Wang, H. B. White, J. Whitmore, M. J. Wilking, B. Winstein, R. Winston, E. T. Worcester, T. Yamanaka, E. D. Zimmerman, R. F. Zukanovich

Physics

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Abstract

We present precise tests of CP and CPT symmetry based on the full data set of K→ππ decays collected by the KTeV experiment at Fermi National Accelerator Laboratory during 1996, 1997, and 1999. This data set contains 16×106 K→π0π0 and 69×106 K→π⁺π ^- decays. We measure the direct CP violation parameter Re(ε^′/ε)=(19.2±2.1)×10^-4. We find the K_L-K_S mass difference Δm=(5270±12) ×106hs^-1 and the K_S lifetime τ_S=(89. 62±0.05)×10^-12s. We also measure several parameters that test CPT invariance. We find the difference between the phase of the indirect CP violation parameter ε and the superweak phase: φ_ε- φ_SW=(0.40±0.56)°. We measure the difference of the relative phases between the CP violating and CP conserving decay amplitudes for K→π⁺π^- (φ_+-) and for K→π0π0 (φ₀₀): Δφ=(0.30±0.35)°. From these phase measurements, we place a limit on the mass difference between K0 and K^̄0: ΔM<4.8×10^-19GeV/c2 at 95% C.L. These results are consistent with those of other experiments, our own earlier measurements, and CPT symmetry.

Original language	English (US)
Article number	092001
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	83
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevD.83.092001
State	Published - May 5 2011

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.83.092001

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Abouzaid, E., Arenton, M., Barker, A. R., Barrio, M., Bellantoni, L., Blucher, E., Bock, G. J., Bown, C., Cheu, E., Coleman, R., Corcoran, M. D., Cox, B., Erwin, A. R., Escobar, C. O., Glazov, A., Golossanov, A., Gomes, R. A., Gouffon, P., Graham, J., ... Zukanovich, R. F. (2011). Precise measurements of direct CP violation, CPT symmetry, and other parameters in the neutral kaon system. Physical Review D - Particles, Fields, Gravitation and Cosmology, 83(9), Article 092001. https://doi.org/10.1103/PhysRevD.83.092001

Abouzaid, E, Arenton, M, Barker, AR, Barrio, M, Bellantoni, L, Blucher, E, Bock, GJ, Bown, C, Cheu, E, Coleman, R, Corcoran, MD, Cox, B, Erwin, AR, Escobar, CO, Glazov, A, Golossanov, A, Gomes, RA, Gouffon, P, Graham, J, Hamm, J, Hsiung, YB, Jensen, DA, Kessler, R, Kotera, K, Ladue, J, Ledovskoy, A, McBride, PL, Monnier, E, Nguyen, H, Niclasen, R, Phillips, DG, Prasad, V, Qi, XR, Ramberg, EJ, Ray, RE, Ronquest, M, Roodman, A, Santos, E, Shanahan, P, Shawhan, PS, Slater, W, Smith, D, Solomey, N, Swallow, EC, Taegar, SA, Toale, PA, Tschirhart, R, Wah, YW, Wang, J, White, HB, Whitmore, J, Wilking, MJ, Winstein, B, Winston, R, Worcester, ET, Yamanaka, T, Zimmerman, ED & Zukanovich, RF 2011, 'Precise measurements of direct CP violation, CPT symmetry, and other parameters in the neutral kaon system', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 83, no. 9, 092001. https://doi.org/10.1103/PhysRevD.83.092001

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title = "Precise measurements of direct CP violation, CPT symmetry, and other parameters in the neutral kaon system",

abstract = "We present precise tests of CP and CPT symmetry based on the full data set of K→ππ decays collected by the KTeV experiment at Fermi National Accelerator Laboratory during 1996, 1997, and 1999. This data set contains 16×106 K→π0π0 and 69×106 K→π+π - decays. We measure the direct CP violation parameter Re(ε′/ε)=(19.2±2.1)×10-4. We find the KL-KS mass difference Δm=(5270±12) ×106hs-1 and the KS lifetime τS=(89. 62±0.05)×10-12s. We also measure several parameters that test CPT invariance. We find the difference between the phase of the indirect CP violation parameter ε and the superweak phase: φε- φSW=(0.40±0.56)°. We measure the difference of the relative phases between the CP violating and CP conserving decay amplitudes for K→π+π- (φ+-) and for K→π0π0 (φ00): Δφ=(0.30±0.35)°. From these phase measurements, we place a limit on the mass difference between K0 and {\=K}0: ΔM<4.8×10-19GeV/c2 at 95% C.L. These results are consistent with those of other experiments, our own earlier measurements, and CPT symmetry.",

author = "E. Abouzaid and M. Arenton and Barker, {A. R.} and M. Barrio and L. Bellantoni and E. Blucher and Bock, {G. J.} and C. Bown and E. Cheu and R. Coleman and Corcoran, {M. D.} and B. Cox and Erwin, {A. R.} and Escobar, {C. O.} and A. Glazov and A. Golossanov and Gomes, {R. A.} and P. Gouffon and J. Graham and J. Hamm and Hsiung, {Y. B.} and Jensen, {D. A.} and R. Kessler and K. Kotera and J. Ladue and A. Ledovskoy and McBride, {P. L.} and E. Monnier and H. Nguyen and R. Niclasen and Phillips, {D. G.} and V. Prasad and Qi, {X. R.} and Ramberg, {E. J.} and Ray, {R. E.} and M. Ronquest and A. Roodman and E. Santos and P. Shanahan and Shawhan, {P. S.} and W. Slater and D. Smith and N. Solomey and Swallow, {E. C.} and Taegar, {S. A.} and Toale, {P. A.} and R. Tschirhart and Wah, {Y. W.} and J. Wang and White, {H. B.} and J. Whitmore and Wilking, {M. J.} and B. Winstein and R. Winston and Worcester, {E. T.} and T. Yamanaka and Zimmerman, {E. D.} and Zukanovich, {R. F.}",

year = "2011",

month = may,

day = "5",

doi = "10.1103/PhysRevD.83.092001",

language = "English (US)",

volume = "83",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

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TY - JOUR

T1 - Precise measurements of direct CP violation, CPT symmetry, and other parameters in the neutral kaon system

AU - Abouzaid, E.

AU - Arenton, M.

AU - Barker, A. R.

AU - Barrio, M.

AU - Bellantoni, L.

AU - Blucher, E.

AU - Bock, G. J.

AU - Bown, C.

AU - Cheu, E.

AU - Coleman, R.

AU - Corcoran, M. D.

AU - Cox, B.

AU - Erwin, A. R.

AU - Escobar, C. O.

AU - Glazov, A.

AU - Golossanov, A.

AU - Gomes, R. A.

AU - Gouffon, P.

AU - Graham, J.

AU - Hamm, J.

AU - Hsiung, Y. B.

AU - Jensen, D. A.

AU - Kessler, R.

AU - Kotera, K.

AU - Ladue, J.

AU - Ledovskoy, A.

AU - McBride, P. L.

AU - Monnier, E.

AU - Nguyen, H.

AU - Niclasen, R.

AU - Phillips, D. G.

AU - Prasad, V.

AU - Qi, X. R.

AU - Ramberg, E. J.

AU - Ray, R. E.

AU - Ronquest, M.

AU - Roodman, A.

AU - Santos, E.

AU - Shanahan, P.

AU - Shawhan, P. S.

AU - Slater, W.

AU - Smith, D.

AU - Solomey, N.

AU - Swallow, E. C.

AU - Taegar, S. A.

AU - Toale, P. A.

AU - Tschirhart, R.

AU - Wah, Y. W.

AU - Wang, J.

AU - White, H. B.

AU - Whitmore, J.

AU - Wilking, M. J.

AU - Winstein, B.

AU - Winston, R.

AU - Worcester, E. T.

AU - Yamanaka, T.

AU - Zimmerman, E. D.

AU - Zukanovich, R. F.

PY - 2011/5/5

Y1 - 2011/5/5

N2 - We present precise tests of CP and CPT symmetry based on the full data set of K→ππ decays collected by the KTeV experiment at Fermi National Accelerator Laboratory during 1996, 1997, and 1999. This data set contains 16×106 K→π0π0 and 69×106 K→π+π - decays. We measure the direct CP violation parameter Re(ε′/ε)=(19.2±2.1)×10-4. We find the KL-KS mass difference Δm=(5270±12) ×106hs-1 and the KS lifetime τS=(89. 62±0.05)×10-12s. We also measure several parameters that test CPT invariance. We find the difference between the phase of the indirect CP violation parameter ε and the superweak phase: φε- φSW=(0.40±0.56)°. We measure the difference of the relative phases between the CP violating and CP conserving decay amplitudes for K→π+π- (φ+-) and for K→π0π0 (φ00): Δφ=(0.30±0.35)°. From these phase measurements, we place a limit on the mass difference between K0 and K̄0: ΔM<4.8×10-19GeV/c2 at 95% C.L. These results are consistent with those of other experiments, our own earlier measurements, and CPT symmetry.

AB - We present precise tests of CP and CPT symmetry based on the full data set of K→ππ decays collected by the KTeV experiment at Fermi National Accelerator Laboratory during 1996, 1997, and 1999. This data set contains 16×106 K→π0π0 and 69×106 K→π+π - decays. We measure the direct CP violation parameter Re(ε′/ε)=(19.2±2.1)×10-4. We find the KL-KS mass difference Δm=(5270±12) ×106hs-1 and the KS lifetime τS=(89. 62±0.05)×10-12s. We also measure several parameters that test CPT invariance. We find the difference between the phase of the indirect CP violation parameter ε and the superweak phase: φε- φSW=(0.40±0.56)°. We measure the difference of the relative phases between the CP violating and CP conserving decay amplitudes for K→π+π- (φ+-) and for K→π0π0 (φ00): Δφ=(0.30±0.35)°. From these phase measurements, we place a limit on the mass difference between K0 and K̄0: ΔM<4.8×10-19GeV/c2 at 95% C.L. These results are consistent with those of other experiments, our own earlier measurements, and CPT symmetry.

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JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

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ER -

Precise measurements of direct CP violation, CPT symmetry, and other parameters in the neutral kaon system

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