Precise Measurements of Direct CP Violation, CPT Symmetry, and Other Parameters in the Neutral Kaon System
| العنوان: | Precise Measurements of Direct CP Violation, CPT Symmetry, and Other Parameters in the Neutral Kaon System |
|---|---|
| المؤلفون: | Collaboration, K, 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, II, DGP, 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 |
| سنة النشر: | 2010 |
| مصطلحات موضوعية: | High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, High Energy Physics - Experiment |
| الوصف: | We present precise tests of CP and CPT symmetry based on the full dataset of K to pipi decays collected by the KTeV experiment at Fermi National Accelerator Laboratory during 1996, 1997, and 1999. This dataset contains 16 million K to 2pi0 and 69 million K to pi+pi- decays. We measure the direct CP violation parameter Re(epsilon'/epsilon) = (19.2 pm 2.1)x10-4. We find the KL-KS mass difference Deltam = (5270 pm 12)x10^6 hbar/s and the KS lifetime tauS = (89.62 pm 0.05)x10-12 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 pm 0.56) degrees. We measure the difference of the relative phases between the CP violating and CP conserving decay amplitudes for K to pi+pi- (phi+-) and for K to 2pi0 (phi00), Delta phi = (0.30 pm 0.35) degrees. From these phase measurements, we place a limit on the mass difference between K0 and K0bar, DeltaM < 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. 28 pages, 30 figures; removed extra figure |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7259b696ab65b5d58594c073663f98cb http://arxiv.org/abs/1011.0127 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....7259b696ab65b5d58594c073663f98cb |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |