Details

Autor(en) / Beteiligte

• Lees, J P
• Schroeder, T
• Buzykaev, A R
• Kravchenko, E A
• Long, O
• Vitug, G M
• Campagnari, C
• Hong, T M
• Kroseberg, J
• Martinez, A J
• Hitlin, D G
• Wagner, S R
• Bernard, D
• Clark, P J
• Santoro, V
• Piccolo, M
• Patrignani, C
• Bhuyan, B
• Prasad, V
• Adametz, A
• Uwer, U
• Mallik, U
• Cochran, J
• Gritsan, A V
• Arnaud, N
• Davier, M
• Le Diberder, F
• Stocchi, A
• Wormser, G
• Wright, D M
• Gabathuler, E
• Sacco, R
• Lafferty, G D
• Cenci, R
• Roberts, D A
• Lindemann, D
• Biassoni, P
• Palombo, F
• Stracka, S
• Kroeger, R
• Simard, M
• De Nardo, G
• Losecco, J M
• Honscheid, K
• Brau, J
• Sinev, N B
• Strom, D
• Torrence, E
• Pompili, A
• Rotondo, M
• Hamon, O
• Pacetti, S
• Carpinelli, M
• Forti, F
• Lopes Pegna, D
• Telnov, A V
• Anulli, F
• Gaspero, M
• Mazzoni, M A
• Hartmann, T
• Leddig, T
• Voss, C
• Waldi, R
• Hamel de Monchenault, G
• Vasseur, G
• Aston, D
• Benitez, J F
• Dorfan, J
• Dunwoodie, W
• Field, R C
• Franco Sevilla, M
• Fulsom, B G
• Gabareen, A M
• Innes, W R
• Kim, P
• Lindquist, B
• Luth, V
• Neal, H
• Nelson, S
• Pulliam, T
• Ratcliff, B N
• Salnikov, A A
• Schindler, R H
• Snyder, A
• Wittgen, M
• Wright, D H
• Ziegler, V
• Sekula, S J
• Bellis, M
• Puccio, E M T
• Spanier, S M
• Bianchi, F
• Lanceri, L
• Vitale, L
• Ahmed, H
• Albert, J
• Bernlochner, F U
• Tasneem, N
• Harrison, P F
• Band, H R

Titel

Observation of time-reversal violation in the B0 meson system

Ist Teil von

• Physical review letters, 2012-11, Vol.109 (21), p.211801-211801

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2012

Quelle

American Physical Society

Beschreibungen/Notizen

• Although CP violation in the B meson system has been well established by the B factories, there has been no direct observation of time-reversal violation. The decays of entangled neutral B mesons into definite flavor states (B(0) or B(0)), and J/ψK(L)(0) or ccK(S)(0) final states (referred to as B(+) or B(-)), allow comparisons between the probabilities of four pairs of T-conjugated transitions, for example, B(0) → B(-) and B(-) → B(0), as a function of the time difference between the two B decays. Using 468 × 10(6) BB pairs produced in Υ(4S) decays collected by the BABAR detector at SLAC, we measure T-violating parameters in the time evolution of neutral B mesons, yielding ΔS(T)(+) = -1.37 ± 0.14(stat) ± 0.06(syst) and ΔS(T)(-) = 1.17 ± 0.18(stat) ± 0.11(syst). These nonzero results represent the first direct observation of T violation through the exchange of initial and final states in transitions that can only be connected by a T-symmetry transformation.