Artículos de revistas
Measurement Of The Σ̄- Lifetime And Direct Comparison With The Σ+ Lifetime
Registro en:
Physical Review D - Particles, Fields, Gravitation And Cosmology. , v. 61, n. 3, p. 1 - 4, 2000.
5562821
2-s2.0-18144366245
Autor
Barbosa R.F.
Albuquerque I.F.
Bondar N.F.
Carrigan R.
Chen D.
Cooper P.S.
Lisheng D.
Denisov A.S.
Dobrovolsky A.V.
Dubbs T.
Endler A.M.F.
Escobar C.O.
Foucher M.
Golovtsov V.L.
Gottschalk H.
Gouffon P.
Grachev V.T.
Khanzadeev A.V.
Kubantsev M.A.
Kuropatkin N.P.
Lach J.
Langland J.
Pengfei L.
Chengze L.
Yunshan L.
Luksys M.
Mahon J.R.P.
McCliment E.
Morelos A.
Newsom C.
Pommot Maia M.C.
Samsonov V.M.
Schegelsky V.A.
Huanzhang S.
Smith V.J.
Fukun T.
Terentyev N.K.
Timm S.
Tkatch I.I.
Uvarov L.N.
Vorobyov A.A.
Jie Y.
Wenheng Z.
Shuchen Z.
Yuanyuan Z.
Institución
Resumen
We have measured the lifetime of the Σ̄- using the Fermilab Proton Center 375 GeV/c charged hyperon beam. We obtained (80.43±0.80±0.14) ps. We also measured the lifetime of the Σ+, obtaining (80.38 ±0.40±0.14) ps, in agreement with the Particle Data Group value. A direct comparison between the two lifetimes from the ratio of the decay curves gives a fractional lifetime difference of Δτ/τ=(-0.06±1.12)%, consistent with equal lifetimes for baryon and antibaryon as required by CPT invariance. ©1999 The American Physical Society. 61 3 1 4 Foucher, M., (1992) Phys. Rev. Lett., 68, p. 3004 Timm, S., (1995) Phys. Rev. D, 51, p. 4638 Dubbs, T., (1994) Phys. Rev. Lett., 72, p. 808 Caso, C., (1998) Eur. Phys. J. C, 3, p. 690 (1993) GEANT 3.21 CERN Program Library W5103, , CERN Kuropatkin, N., private communicationLangland, J.L., (1995) Hyperon and Antihyperon Production in P-Cu Interactions, , Ph.D. thesis, University of Iowa Morelos, A., (1993) Phys. Rev. Lett., 71, p. 3417