Paper detail

Precise measurement of the CP violation parameter sin2phi_1 in B0-->(c\bar c)K0 decays

We present a precise measurement of the CP violation parameter sin2phi_1 and the direct CP violation parameter A_f using the final data sample of 772x10^6 B\bar B pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. One neutral B meson is reconstructed in a J/psi K0S, psi(2S) K0S, chi_c1 K0S or J/psi K0L CP-eigenstate and its flavor is identified from the decay products of the accompanying B meson. From the distribution of proper time intervals between the two B decays, we obtain the following CP violation parameters: sin2phi_1=0.667+-0.023(stat)+-0.012(syst) and A_f=0.006+-0.016(stat)+-0.012(syst).

preprint2012arXivOpen access
Belle CollaborationI. AdachiH. AiharaD. M. AsnerV. AulchenkoT. AushevT. AzizA. M. BakichA. BayV. BhardwajB. BhuyanM. BischofbergerA. BondarA. BozekM. BrackoT. E. BrowderP. ChenB. G. CheonK. ChilikinR. ChistovK. ChoS. -K. ChoiY. ChoiJ. DalsenoM. DanilovZ. DolezalZ. DrasalS. EidelmanD. EpifanovJ. E. FastV. GaurN. GabyshevA. GarmashY. M. GohB. GolobJ. HabaK. HaraT. HaraK. HayasakaH. HayashiiT. HiguchiY. HoriiY. HoshiW. -S. HouY. B. HsiungH. J. HyunT. IijimaA. IshikawaR. ItohM. IwabuchiY. IwasakiT. IwashitaT. JuliusP. KapustaN. KatayamaT. KawasakiH. KichimiC. KieslingH. J. KimH. O. KimJ. B. KimJ. H. KimK. T. KimY. J. KimK. KinoshitaB. R. KoS. KoblitzP. KodyšS. KorparP. KrizanP. KrokovnyT. KuhrR. KumarT. KumitaA. KuzminY. -J. KwonJ. S. LangeS. -H. LeeJ. LiY. LiC. LiuY. LiuZ. Q. LiuD. LiventsevR. LouvotD. MatvienkoS. McOnieK. MiyabayashiH. MiyataY. MiyazakiR. MizukG. B. MohantyT. MoriN. MuramatsuE. NakanoM. NakaoH. NakazawaS. NeubauerS. NishidaK. NishimuraO. NitohS. OgawaT. OhshimaS. OkunoS. L. OlsenY. OnukiH. OzakiP. PakhlovG. PakhlovaH. K. ParkK. S. ParkT. K. PedlarR. PestotnikM. PetricL. E. PiilonenA. PoluektovM. RohrkenM. RozanskaH. SahooK. SakaiY. SakaiT. SanukiY. SatoO. SchneiderC. SchwandaA. J. SchwartzK. SenyoV. ShebalinC. P. ShenT. -A. ShibataJ. -G. ShiuB. ShwartzA. SibidanovF. SimonJ. B. SinghP. SmerkolY. -S. SohnA. SokolovE. SolovievaS. StanicM. StaricM. SumihamaK. SumisawaT. SumiyoshiS. TanakaG. TatishviliY. TeramotoI. TikhomirovK. TrabelsiT. TsuboyamaM. UchidaS. UeharaT. UglovY. UnnoS. UnoY. UshirodaS. E. VahsenG. VarnerK. E. VarvellA. VinokurovaC. H. WangM. -Z. WangP. WangM. WatanabeY. WatanabeK. M. WilliamsE. WonB. D. YabsleyH. YamamotoY. YamashitaM. YamauchiY. YusaZ. P. ZhangV. ZhilichA. ZupancO. Zyukova
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Belle CollaborationI. AdachiH. AiharaD. M. AsnerV. AulchenkoT. AushevT. AzizA. M. BakichA. BayV. BhardwajB. BhuyanM. BischofbergerA. BondarA. BozekM. BrackoT. E. BrowderP. ChenB. G. CheonK. ChilikinR. ChistovK. ChoS. -K. ChoiY. ChoiJ. DalsenoM. DanilovZ. DolezalZ. DrasalS. EidelmanD. EpifanovJ. E. FastV. GaurN. GabyshevA. GarmashY. M. GohB. GolobJ. HabaK. HaraT. HaraK. HayasakaH. HayashiiT. HiguchiY. HoriiY. HoshiW. -S. HouY. B. HsiungH. J. HyunT. IijimaA. IshikawaR. ItohM. IwabuchiY. IwasakiT. IwashitaT. JuliusP. KapustaN. KatayamaT. KawasakiH. KichimiC. KieslingH. J. KimH. O. KimJ. B. KimJ. H. KimK. T. KimY. J. KimK. KinoshitaB. R. KoS. KoblitzP. KodyšS. KorparP. KrizanP. KrokovnyT. KuhrR. KumarT. KumitaA. KuzminY. -J. KwonJ. S. LangeS. -H. LeeJ. LiY. LiC. LiuY. LiuZ. Q. LiuD. LiventsevR. LouvotD. MatvienkoS. McOnieK. MiyabayashiH. MiyataY. MiyazakiR. MizukG. B. MohantyT. MoriN. MuramatsuE. NakanoM. NakaoH. NakazawaS. NeubauerS. NishidaK. NishimuraO. NitohS. OgawaT. OhshimaS. OkunoS. L. OlsenY. OnukiH. OzakiP. PakhlovG. PakhlovaH. K. ParkK. S. ParkT. K. PedlarR. PestotnikM. PetricL. E. PiilonenA. PoluektovM. RohrkenM. RozanskaH. SahooK. SakaiY. SakaiT. SanukiY. SatoO. SchneiderC. SchwandaA. J. SchwartzK. SenyoV. ShebalinC. P. ShenT. -A. ShibataJ. -G. ShiuB. ShwartzA. SibidanovF. SimonJ. B. SinghP. SmerkolY. -S. SohnA. SokolovE. SolovievaS. StanicM. StaricM. SumihamaK. SumisawaT. SumiyoshiS. TanakaG. TatishviliY. TeramotoI. TikhomirovK. TrabelsiT. TsuboyamaM. UchidaS. UeharaT. UglovY. UnnoS. UnoY. UshirodaS. E. VahsenG. VarnerK. E. VarvellA. VinokurovaC. H. WangM. -Z. WangP. WangM. WatanabeY. WatanabeK. M. WilliamsE. WonB. D. YabsleyH. YamamotoY. YamashitaM. YamauchiY. YusaZ. P. ZhangV. ZhilichA. ZupancO. Zyukova

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