Artículos de revistas
Precise measurements of direct CP violation, CPT symmetry, and other parameters in the neutral kaon system
Fecha
2011Registro en:
PHYSICAL REVIEW D, v.83, n.9, 2011
1550-7998
10.1103/PhysRevD.83.092001
Autor
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, Philippe
GRAHAM, J.
HAMM, J.
HSIUNG, Y. B.
JENSEN, D. A.
KESSLER, R.
KOTERA, K.
LADUE, J.
LEDOVSKOY, A.
MCBRIDE, P. L.
MONNIER, E.
NGUYEN, H.
NICLASEN, R.
II, D. G. Phillips
PRASAD, V.
QI, X. R.
RAMBERG, E. J.
RAY, R. E.
RONQUEST, M.
ROODMAN, A.
Paes, Eliel dos Santos
SHANAHAN, P.
SHAWHAN, P. S.
SLATER, W.
SMITH, D.
SOLOMEY, N.
SWALLOW, E. C.
TAEGAR, S. A.
TOALE, P. A.
TSCHIRHART, R.
WAH, Y. W.
WANG, J.
WHITE, H. B.
WHITMORE, J.
WILKING, M. J.
WINSTEIN, B.
WINSTON, R.
WORCESTER, E. T.
YAMANAKA, T.
ZIMMERMAN, E. D.
Funchal, Renata Zukanovich
Institución
Resumen
We present precise tests of CP and CPT symmetry based on the full data set of K -> pi pi decays collected by the KTeV experiment at Fermi National Accelerator Laboratory during 1996, 1997, and 1999. This data set contains 16 x 10(6) K -> pi(0)pi(0) and 69 x 10(6) K -> pi(+)pi(-) decays. We measure the direct CP violation parameter Re(epsilon'/epsilon) = (19.2 +/- 2.1) x 10(-4). We find the K(L) -> K(S) mass difference Delta m = (5270 +/- 12) x 10(6) (h) over tilde s(-1) and the K(S) lifetime tau(S) = (89.62 +/- 0.05) x 10(-12) s. We also measure several parameters that test CPT invariance. We find the difference between the phase of the indirect CP violation parameter epsilon and the superweak phase: phi(epsilon) - phi(SW) =(0.40 +/- 0.56)degrees. We measure the difference of the relative phases between the CP violating and CP conserving decay amplitudes for K -> pi(+)pi(-) (phi(+-)) and for K -> pi(0)pi(0) (phi(00)): Delta phi = (0.30 +/- 0.35)degrees. From these phase measurements, we place a limit on the mass difference between K(0) and (K) over bar (0): Delta M < 4.8 x 10(-19) GeV/c(2) at 95% C.L. These results are consistent with those of other experiments, our own earlier measurements, and CPT symmetry.