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

A. Alavi-Harati; T. Alexopoulos; M. Arenton; K. Arisaka; S. Averitte; R. F. Barbosa; A. R. Barker; M. Barrio; L. Bellantoni; A. Bellavance; J. Belz; D. R. Bergman; E. Blucher; G. J. Bock; C. Bown; S. Bright; E. Cheu; S. Childress; R. Coleman; M. D. Corcoran; G. Corti; B. Cox; A. R. Erwin; R. Ford; A. Glazov; A. Golossanov; G. Graham; J. Graham; E. Halkiadakis; J. Hamm; K. Hanagaki; Y. B. Hsiung; V. Jejer; D. A. Jensen; R. Kessler; H. G.E. Kobrak; J. LaDue; A. Lath; A. Ledovskoy; P. L. McBride; P. Mikelsons; E. Monnier; T. Nakaya; K. S. Nelson; H. Nguyen; V. O'Dell; M. Pang; R. Pordes; V. Prasad; X. R. Qi; B. Quinn; E. J. Ramberg; R. E. Ray; A. Roodman; S. Schnetzer; K. Senyo; P. Shanahan; P. S. Shawhan; J. Shields; W. Slater; N. Solomey; S. V. Somalwar; R. L. Stone; E. C. Swallow; S. A. Taegar; R. J. Tesarek; G. B. Thomson; P. A. Toale; A. Tripathi; R. Tschirhart; S. E. Turner; Y. W. Wah; J. Wang; H. B. White; J. Whitmore; B. Winstein; R. Winston; T. Yamanaka; E. D. Zimmerman

doi:10.1103/PhysRevD.67.012005

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

A. Alavi-Harati, T. Alexopoulos, M. Arenton, K. Arisaka, S. Averitte, R. F. Barbosa, A. R. Barker, M. Barrio, L. Bellantoni, A. Bellavance, J. Belz, D. R. Bergman, E. Blucher, G. J. Bock, C. Bown, S. Bright, E. Cheu, S. Childress, R. Coleman, M. D. CorcoranG. Corti, B. Cox, A. R. Erwin, R. Ford, A. Glazov, A. Golossanov, G. Graham, J. Graham, E. Halkiadakis, J. Hamm, K. Hanagaki, Y. B. Hsiung, V. Jejer, D. A. Jensen, R. Kessler, H. G.E. Kobrak, J. LaDue, A. Lath, A. Ledovskoy, P. L. McBride, P. Mikelsons, E. Monnier, T. Nakaya, K. S. Nelson, H. Nguyen, V. O'Dell, M. Pang, R. Pordes, V. Prasad, X. R. Qi, B. Quinn, E. J. Ramberg, R. E. Ray, A. Roodman, S. Schnetzer, K. Senyo, P. Shanahan, P. S. Shawhan, J. Shields, W. Slater, N. Solomey, S. V. Somalwar, R. L. Stone, E. C. Swallow, S. A. Taegar, R. J. Tesarek, G. B. Thomson, P. A. Toale, A. Tripathi, R. Tschirhart, S. E. Turner, Y. W. Wah, J. Wang, H. B. White, J. Whitmore, B. Winstein, R. Winston, T. Yamanaka, E. D. Zimmerman

Physics

Research output: Contribution to journal › Article › peer-review

261 Scopus citations

Abstract

We present a series of measurements based on K_L,S→ π⁺ π^- and K _L,S→π⁰π⁰ decays collected in 1996-1997 by the KTeV experiment (E832) at Fermilab. We compare these four K→ππ decay rates to measure the direct CP violation parameter Re(ε′/ε) = (20.7±2.8)×10^-4. We also test CPT symmetry by measuring the relative phase between the CP violating and CP conserving decay amplitudes for K → π⁺ π^- (φ_+-) and for K → π⁰ π⁰ (φ₀₀). We find the difference between the relative phases to be Δφ=φ₀₀-φ_+- = (+ 0.39 ±0.50)°, and the deviation of φ_+- from the superweak phase to be φ_+- - φ_SW=(+0.61±1.19)°; both results are consistent with CPT symmetry. In addition, we present new measurements of the K_L-K_S mass difference and K_S lifetime: Δm = (5261±15)×10⁶ ℏs^-1 and τ_S= (89.65±0.07)×10^-12 S.

Original language	English (US)
Article number	012005
Journal	Physical Review D
Volume	67
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevD.67.012005
State	Published - 2003

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.67.012005

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Alavi-Harati, A., Alexopoulos, T., Arenton, M., Arisaka, K., Averitte, S., Barbosa, R. F., Barker, A. R., Barrio, M., Bellantoni, L., Bellavance, A., Belz, J., Bergman, D. R., Blucher, E., Bock, G. J., Bown, C., Bright, S., Cheu, E., Childress, S., Coleman, R., ... Zimmerman, E. D. (2003). Measurements of direct CP violation, CPT symmetry, and other parameters in the neutral kaon system. Physical Review D, 67(1), [012005]. https://doi.org/10.1103/PhysRevD.67.012005

Alavi-Harati, A, Alexopoulos, T, Arenton, M, Arisaka, K, Averitte, S, Barbosa, RF, Barker, AR, Barrio, M, Bellantoni, L, Bellavance, A, Belz, J, Bergman, DR, Blucher, E, Bock, GJ, Bown, C, Bright, S, Cheu, E, Childress, S, Coleman, R, Corcoran, MD, Corti, G, Cox, B, Erwin, AR, Ford, R, Glazov, A, Golossanov, A, Graham, G, Graham, J, Halkiadakis, E, Hamm, J, Hanagaki, K, Hsiung, YB, Jejer, V, Jensen, DA, Kessler, R, Kobrak, HGE, LaDue, J, Lath, A, Ledovskoy, A, McBride, PL, Mikelsons, P, Monnier, E, Nakaya, T, Nelson, KS, Nguyen, H, O'Dell, V, Pang, M, Pordes, R, Prasad, V, Qi, XR, Quinn, B, Ramberg, EJ, Ray, RE, Roodman, A, Schnetzer, S, Senyo, K, Shanahan, P, Shawhan, PS, Shields, J, Slater, W, Solomey, N, Somalwar, SV, Stone, RL, Swallow, EC, Taegar, SA, Tesarek, RJ, Thomson, GB, Toale, PA, Tripathi, A, Tschirhart, R, Turner, SE, Wah, YW, Wang, J, White, HB, Whitmore, J, Winstein, B, Winston, R, Yamanaka, T & Zimmerman, ED 2003, 'Measurements of direct CP violation, CPT symmetry, and other parameters in the neutral kaon system', Physical Review D, vol. 67, no. 1, 012005. https://doi.org/10.1103/PhysRevD.67.012005

@article{bc39332fa5bd4786903c709e9ce08af7,

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

abstract = "We present a series of measurements based on KL,S→ π+ π- and K L,S→π0π0 decays collected in 1996-1997 by the KTeV experiment (E832) at Fermilab. We compare these four K→ππ decay rates to measure the direct CP violation parameter Re(ε′/ε) = (20.7±2.8)×10-4. We also test CPT symmetry by measuring the relative phase between the CP violating and CP conserving decay amplitudes for K → π+ π- (φ+-) and for K → π0 π0 (φ00). We find the difference between the relative phases to be Δφ=φ00-φ+- = (+ 0.39 ±0.50)°, and the deviation of φ+- from the superweak phase to be φ+- - φSW=(+0.61±1.19)°; both results are consistent with CPT symmetry. In addition, we present new measurements of the KL-KS mass difference and KS lifetime: Δm = (5261±15)×106 ℏs-1 and τS= (89.65±0.07)×10-12 S.",

author = "A. Alavi-Harati and T. Alexopoulos and M. Arenton and K. Arisaka and S. Averitte and Barbosa, {R. F.} and Barker, {A. R.} and M. Barrio and L. Bellantoni and A. Bellavance and J. Belz and Bergman, {D. R.} and E. Blucher and Bock, {G. J.} and C. Bown and S. Bright and E. Cheu and S. Childress and R. Coleman and Corcoran, {M. D.} and G. Corti and B. Cox and Erwin, {A. R.} and R. Ford and A. Glazov and A. Golossanov and G. Graham and J. Graham and E. Halkiadakis and J. Hamm and K. Hanagaki and Hsiung, {Y. B.} and V. Jejer and Jensen, {D. A.} and R. Kessler and Kobrak, {H. G.E.} and J. LaDue and A. Lath and A. Ledovskoy and McBride, {P. L.} and P. Mikelsons and E. Monnier and T. Nakaya and Nelson, {K. S.} and H. Nguyen and V. O'Dell and M. Pang and R. Pordes and V. Prasad and Qi, {X. R.} and B. Quinn and Ramberg, {E. J.} and Ray, {R. E.} and A. Roodman and S. Schnetzer and K. Senyo and P. Shanahan and Shawhan, {P. S.} and J. Shields and W. Slater and N. Solomey and Somalwar, {S. V.} and Stone, {R. L.} and Swallow, {E. C.} and Taegar, {S. A.} and Tesarek, {R. J.} and Thomson, {G. B.} and Toale, {P. A.} and A. Tripathi and R. Tschirhart and Turner, {S. E.} and Wah, {Y. W.} and J. Wang and White, {H. B.} and J. Whitmore and B. Winstein and R. Winston and T. Yamanaka and Zimmerman, {E. D.}",

year = "2003",

doi = "10.1103/PhysRevD.67.012005",

language = "English (US)",

volume = "67",

journal = "Physical review D: Particles and fields",

issn = "0556-2821",

publisher = "American Institute of Physics",

number = "1",

}

TY - JOUR

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

AU - Alavi-Harati, A.

AU - Alexopoulos, T.

AU - Arenton, M.

AU - Arisaka, K.

AU - Averitte, S.

AU - Barbosa, R. F.

AU - Barker, A. R.

AU - Barrio, M.

AU - Bellantoni, L.

AU - Bellavance, A.

AU - Belz, J.

AU - Bergman, D. R.

AU - Blucher, E.

AU - Bock, G. J.

AU - Bown, C.

AU - Bright, S.

AU - Cheu, E.

AU - Childress, S.

AU - Coleman, R.

AU - Corcoran, M. D.

AU - Corti, G.

AU - Cox, B.

AU - Erwin, A. R.

AU - Ford, R.

AU - Glazov, A.

AU - Golossanov, A.

AU - Graham, G.

AU - Graham, J.

AU - Halkiadakis, E.

AU - Hamm, J.

AU - Hanagaki, K.

AU - Hsiung, Y. B.

AU - Jejer, V.

AU - Jensen, D. A.

AU - Kessler, R.

AU - Kobrak, H. G.E.

AU - LaDue, J.

AU - Lath, A.

AU - Ledovskoy, A.

AU - McBride, P. L.

AU - Mikelsons, P.

AU - Monnier, E.

AU - Nakaya, T.

AU - Nelson, K. S.

AU - Nguyen, H.

AU - O'Dell, V.

AU - Pang, M.

AU - Pordes, R.

AU - Prasad, V.

AU - Qi, X. R.

AU - Quinn, B.

AU - Ramberg, E. J.

AU - Ray, R. E.

AU - Roodman, A.

AU - Schnetzer, S.

AU - Senyo, K.

AU - Shanahan, P.

AU - Shawhan, P. S.

AU - Shields, J.

AU - Slater, W.

AU - Solomey, N.

AU - Somalwar, S. V.

AU - Stone, R. L.

AU - Swallow, E. C.

AU - Taegar, S. A.

AU - Tesarek, R. J.

AU - Thomson, G. B.

AU - Toale, P. A.

AU - Tripathi, A.

AU - Tschirhart, R.

AU - Turner, S. E.

AU - Wah, Y. W.

AU - Wang, J.

AU - White, H. B.

AU - Whitmore, J.

AU - Winstein, B.

AU - Winston, R.

AU - Yamanaka, T.

AU - Zimmerman, E. D.

PY - 2003

Y1 - 2003

N2 - We present a series of measurements based on KL,S→ π+ π- and K L,S→π0π0 decays collected in 1996-1997 by the KTeV experiment (E832) at Fermilab. We compare these four K→ππ decay rates to measure the direct CP violation parameter Re(ε′/ε) = (20.7±2.8)×10-4. We also test CPT symmetry by measuring the relative phase between the CP violating and CP conserving decay amplitudes for K → π+ π- (φ+-) and for K → π0 π0 (φ00). We find the difference between the relative phases to be Δφ=φ00-φ+- = (+ 0.39 ±0.50)°, and the deviation of φ+- from the superweak phase to be φ+- - φSW=(+0.61±1.19)°; both results are consistent with CPT symmetry. In addition, we present new measurements of the KL-KS mass difference and KS lifetime: Δm = (5261±15)×106 ℏs-1 and τS= (89.65±0.07)×10-12 S.

AB - We present a series of measurements based on KL,S→ π+ π- and K L,S→π0π0 decays collected in 1996-1997 by the KTeV experiment (E832) at Fermilab. We compare these four K→ππ decay rates to measure the direct CP violation parameter Re(ε′/ε) = (20.7±2.8)×10-4. We also test CPT symmetry by measuring the relative phase between the CP violating and CP conserving decay amplitudes for K → π+ π- (φ+-) and for K → π0 π0 (φ00). We find the difference between the relative phases to be Δφ=φ00-φ+- = (+ 0.39 ±0.50)°, and the deviation of φ+- from the superweak phase to be φ+- - φSW=(+0.61±1.19)°; both results are consistent with CPT symmetry. In addition, we present new measurements of the KL-KS mass difference and KS lifetime: Δm = (5261±15)×106 ℏs-1 and τS= (89.65±0.07)×10-12 S.

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U2 - 10.1103/PhysRevD.67.012005

DO - 10.1103/PhysRevD.67.012005

M3 - Article

AN - SCOPUS:0042948593

SN - 0556-2821

VL - 67

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

IS - 1

M1 - 012005

ER -

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

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