We measure the time dependence of the ratio of decay rates for D-0 -> K+ pi(-) to the Cabibbo- favored decay D-0 -> K- pi(+). The charge conjugate decays are included. A signal of 3: 3 x 10(4) D*(+) -> pi D-+(0), D-0 -> K+ pi(-) decays is obtained with D-0 proper decay times between 0.75 and 10 mean D-0 lifetimes. The data were recorded with the CDF II detector at the Fermilab Tevatron and correspond to an integrated luminosity of 9: 6 fb(-1) for p (p) over bar collisions at root s = 1: 96 TeV. Assuming CP conservation, we search for D-0-(D) over bar (0) mixing and measure the mixing parameters to be R-D = (3: 51 +/- 0: 35) x 10(-3), y' = (4: 3 +/- 4: 3) x 10(-3), and x'(2) = (0: 08 +/- 0: 18) x 10(-3). We report Bayesian probability intervals in the x'(2)- y' plane and find that the significance of excluding the no- mixing hypothesis is equivalent to 6.1 Gaussian standard deviations, providing the second observation of D-0-(D) over bar (0) mixing from a single experiment.

T. Aaltonen, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, et al. (2013). Observation of D-0-(D)over-bar(0) Mixing Using the CDF II Detector. PHYSICAL REVIEW LETTERS, 111, 231802-1-231802-8 [10.1103/PhysRevLett.111.231802].

Observation of D-0-(D)over-bar(0) Mixing Using the CDF II Detector

BRIGLIADORI, LUCA;CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MAZZANTI, PAOLO;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2013

Abstract

We measure the time dependence of the ratio of decay rates for D-0 -> K+ pi(-) to the Cabibbo- favored decay D-0 -> K- pi(+). The charge conjugate decays are included. A signal of 3: 3 x 10(4) D*(+) -> pi D-+(0), D-0 -> K+ pi(-) decays is obtained with D-0 proper decay times between 0.75 and 10 mean D-0 lifetimes. The data were recorded with the CDF II detector at the Fermilab Tevatron and correspond to an integrated luminosity of 9: 6 fb(-1) for p (p) over bar collisions at root s = 1: 96 TeV. Assuming CP conservation, we search for D-0-(D) over bar (0) mixing and measure the mixing parameters to be R-D = (3: 51 +/- 0: 35) x 10(-3), y' = (4: 3 +/- 4: 3) x 10(-3), and x'(2) = (0: 08 +/- 0: 18) x 10(-3). We report Bayesian probability intervals in the x'(2)- y' plane and find that the significance of excluding the no- mixing hypothesis is equivalent to 6.1 Gaussian standard deviations, providing the second observation of D-0-(D) over bar (0) mixing from a single experiment.
2013
T. Aaltonen, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, et al. (2013). Observation of D-0-(D)over-bar(0) Mixing Using the CDF II Detector. PHYSICAL REVIEW LETTERS, 111, 231802-1-231802-8 [10.1103/PhysRevLett.111.231802].
T. Aaltonen;S. Amerio;D. Amidei;A. Anastassov;A. Annovi;J. Antos;G. Apollinari;J. Appel;T. Arisawa;A. Artikov;J. Asaadi;W. Ashmanskas;B. Auerbach;A. A...espandi
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/229715
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 46
  • ???jsp.display-item.citation.isi??? 32
social impact