Determination of the strong phase in D0-->K+pi- using quantum-correlated measurements

J L Rosner; J P Alexander; D G Cassel; J E Duboscq; R Ehrlich; L Fields; L Gibbons; R Gray; S W Gray; D L Hartill; B K Heltsley; D Hertz; C D Jones; J Kandaswamy; D L Kreinick; V E Kuznetsov; H Mahlke-Krüger; D Mohapatra; P U E Onyisi; J R Patterson; D Peterson; D Riley; A Ryd; A J Sadoff; X Shi; S Stroiney; W M Sun; T Wilksen; S B Athar; R Patel; J Yelton; P Rubin; B I Eisenstein; I Karliner; S Mehrabyan; N Lowrey; M Selen; E J White; J Wiss; R E Mitchell; M R Shepherd; D Besson; T K Pedlar; D Cronin-Hennessy; K Y Gao; J Hietala; Y Kubota; T Klein; B W Lang; R Poling; A W Scott; P Zweber; S Dobbs; Z Metreveli; K K Seth; A Tomaradze; J Libby; A Powell; G Wilkinson; K M Ecklund; W Love; V Savinov; A Lopez; H Mendez; J Ramirez; J Y Ge; D H Miller; B Sanghi; I P J Shipsey; B Xin; G S Adams; M Anderson; J P Cummings; I Danko; D Hu; B Moziak; J Napolitano; Q He; J Insler; H Muramatsu; C S Park; E H Thorndike; F Yang; M Artuso; S Blusk; S Khalil; J Li; R Mountain; S Nisar; K Randrianarivony; N Sultana; T Skwarnicki; S Stone; J C Wang; L M Zhang; G Bonvicini; D Cinabro; M Dubrovin; A Lincoln; J Rademacker; D M Asner; K W Edwards; P Naik; R A Briere; T Ferguson; G Tatishvili; H Vogel; M E Watkins; CLEO Collaboration

doi:10.1103/PhysRevLett.100.221801

Determination of the strong phase in D0-->K+pi- using quantum-correlated measurements

Phys Rev Lett. 2008 Jun 6;100(22):221801. doi: 10.1103/PhysRevLett.100.221801. Epub 2008 Jun 4.

Authors

J L Rosner¹, J P Alexander, D G Cassel, J E Duboscq, R Ehrlich, L Fields, L Gibbons, R Gray, S W Gray, D L Hartill, B K Heltsley, D Hertz, C D Jones, J Kandaswamy, D L Kreinick, V E Kuznetsov, H Mahlke-Krüger, D Mohapatra, P U E Onyisi, J R Patterson, D Peterson, D Riley, A Ryd, A J Sadoff, X Shi, S Stroiney, W M Sun, T Wilksen, S B Athar, R Patel, J Yelton, P Rubin, B I Eisenstein, I Karliner, S Mehrabyan, N Lowrey, M Selen, E J White, J Wiss, R E Mitchell, M R Shepherd, D Besson, T K Pedlar, D Cronin-Hennessy, K Y Gao, J Hietala, Y Kubota, T Klein, B W Lang, R Poling, A W Scott, P Zweber, S Dobbs, Z Metreveli, K K Seth, A Tomaradze, J Libby, A Powell, G Wilkinson, K M Ecklund, W Love, V Savinov, A Lopez, H Mendez, J Ramirez, J Y Ge, D H Miller, B Sanghi, I P J Shipsey, B Xin, G S Adams, M Anderson, J P Cummings, I Danko, D Hu, B Moziak, J Napolitano, Q He, J Insler, H Muramatsu, C S Park, E H Thorndike, F Yang, M Artuso, S Blusk, S Khalil, J Li, R Mountain, S Nisar, K Randrianarivony, N Sultana, T Skwarnicki, S Stone, J C Wang, L M Zhang, G Bonvicini, D Cinabro, M Dubrovin, A Lincoln, J Rademacker, D M Asner, K W Edwards, P Naik, R A Briere, T Ferguson, G Tatishvili, H Vogel, M E Watkins; CLEO Collaboration

Affiliation

¹ Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.

PMID: 18643413
DOI: 10.1103/PhysRevLett.100.221801

Abstract

We exploit the quantum coherence between pair-produced D0 and D[over]0 in psi(3770) decays to study charm mixing, which is characterized by the parameters x and y, and to make a first determination of the relative strong phase delta between D0-->K+pi- and D[over]0-->K+pi-. Using 281 pb(-1) of e+e- collision data collected with the CLEO-c detector at Ecm=3.77 GeV, as well as branching fraction input and time-integrated measurements of RM identical with (x2 + y2)/2 and RWS identical with Gamma(D0-->K+pi-)/Gamma(D[over]0-->K+pi-) from other experiments, we find cosdelta=1.03(-0.17)(+0.31)+/-0.06, where the uncertainties are statistical and systematic, respectively. By further including other mixing parameter measurements, we obtain an alternate measurement of cosdelta=1.10+/-0.35+/-0.07, as well as x sindelta=(4.4(-1.8)(+2.7)+/-2.9)x10(-3) and delta=(22(-12-11)(+11+9)) degrees .