Measurement of D{sup 0}{yields}{pi}l{nu}(Kl{nu}) Form Factors and Absolute Branching Fractions

Journal Article · Fri Aug 11 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.061804· OSTI ID:20860633

Widhalm, L; Leder, G; Mandl, F; Mitaroff, W; Schwanda, C ^[1]; Abe, K; Adachi, I; Gershon, T; Haba, J; Hazumi, M; Itoh, R; Iwasaki, Y; Limosani, A; Nakamura, I; Nishida, S; Sakai, Y; Stamen, R; Suzuki, S Y; Takasaki, F; Tamai, K ^[2]

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1. Institute of High Energy Physics, Vienna (Austria)
2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)

Using a 282 fb{sup -1} data sample collected by the Belle experiment at the KEKB e{sup +}e{sup -} collider, we study D{sup 0} decays to K{sup -}l{sup +}{nu} and {pi}{sup -}l{sup +}{nu} final states. The D{sup 0} flavor and momentum are tagged through a full reconstruction of the recoiling charm meson and additional mesons from fragmentation. The reconstruction method provides very good resolution in neutrino momentum and in q{sup 2}=(p{sub l}+p{sub {nu}}){sup 2}. Normalizing to the total number of D{sup 0} tags, we measure the absolute branching fractions to be B(D{sup 0}{yields}Kl{nu})=(3.45{+-}0.07{sub stat}{+-}0.20{sub syst})% and B(D{sup 0}{yields}{pi}l{nu})=(0.255{+-}0.019{sub stat}{+-}0.016{sub syst})% and the semileptonic form factors (within the modified pole model) f{sub +}{sup K}(0)=0.695{+-}0.007{sub stat}{+-}0.022{sub syst} and f{sub +}{sup {pi}}(0)=0.624{+-}0.020{sub stat}{+-}0.030{sub syst}.

• OSTI ID: 20860633
• Journal Information: Physical Review Letters, Vol. 97, Issue 6; Other Information: DOI: 10.1103/PhysRevLett.97.061804; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
D NEUTRAL MESONS
FLAVOR MODEL
FORM FACTORS
KAONS
NEUTRINOS
PARTICLE DECAY
PARTICLE PRODUCTION
PIONS MINUS