Branching fractions for D0 ---&gt; K+ K- and D0 ---&gt; pi+ pi-, and a search for CP violation in D0 decays

Aitala, E. M.

doi:10.1016/S0370-2693(97)01570-0

Branching fractions for D0 ---> K+ K- and D0 ---> pi+ pi-, and a search for CP violation in D0 decays

Journal Article · Sat Nov 01 04:00:00 EST 1997 · Phys.Lett.B

DOI:https://doi.org/10.1016/S0370-2693(97)01570-0· OSTI ID:1893430

Aitala, E. M.

Using the large hadroproduced charm sample collected in experiment E791 at Fermilab, we have measured ratios of branching fractions for the two-body singly-Cabibbo-suppressed charged decays of the D0: (D0 -> KK)/(D0 -> Kpi) = 0.109 +- 0.003 +- 0.003, (D0 -> pipi)/(D0 -> Kpi) = 0.040 +- 0.002 +- 0.003, and (D0 -> KK)/(D0 -> pipi) = 2.75 +- 0.15 +- 0.16. We have looked for differences in the decay rates of D0 and D0bar to the CP eigenstates K+K- and pi+pi-, and have measured the CP asymmetry parameters A_CP(K+K-) = -0.010 +- 0.049 +- 0.012 and A_CP(pi+pi-) = -0.049 +- 0.078 +- 0.030, both consistent with zero.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Organization:: E791

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1893430

Report Number(s):: FERMILAB-PUB-97-345-E; FNAL-P-PUB-97-345-E; arXiv:hep-ex/9711003; oai:inspirehep.net:450879

Journal Information:: Phys.Lett.B, Journal Name: Phys.Lett.B Vol. 421

Country of Publication:: United States

Language:: English

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