منابع مشابه
Measurement of prominent eta-decay branching fractions.
The decay psi(2S) --> etaJ/psi is used to measure, for the first time, all prominent eta-meson branching fractions with the same experiment in the same dataset, thereby providing a consistent treatment of systematics across branching fractions. We present results for eta decays to gamma gamma, pi(+)pi(-)pi(0), 3pi(0), pi(+)pi(-)gamma and e(+)e(-)gamma, accounting for 99.9% of all eta decays. Th...
متن کاملMeasurement of Branching Fractions in τ Decays
Full LEP-I data collected by the ALEPH detector during 1991-1995 running are analyzed in order to measure the τ decay branching fractions. The analysis follows the global method used in the published study based on 1991-1993 data, with several improvements, especially concerning the treatment of photons and π’s. Extensive systematic studies are performed, in order to match the large statistics ...
متن کاملMeasurement of the absolute branching fractions forD
P. del Amo Sanchez, J. P. Lees, V. Poireau, E. Prencipe, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, M. Battaglia, D.N. Brown, B. Hooberman, L. T. Kerth, Yu. G. Kolomensky, G. Lynch, I. L. Osipenkov, T. Tanabe, C.M. Hawkes, A. T. Watson, H. Koch, T. Schroeder, D. J. Asgeirsson, C. Hearty, T. S. Mattison, J. A. McKenna, A. Khan, A...
متن کامل21 Measurement of branching fractions in radiative
Publications in refereed journals 1 Observation of e+e− annihilations into the C = +1 hadronic final states ρρ and φρ B. Aubert et al. [BABAR Collaboration], Phys. Rev. Lett. 97, 112002 (2006). 2 Search for the decay B → K SK SK L B. Aubert et al. [BABAR Collaboration], Phys. Rev. D 74, 032005 (2006). 3 Search for doubly charmed baryons Ξcc and Ξ ++ cc in BABAR B. Aubert et al. [BABAR Collabora...
متن کاملAn Approach to Fractions Via Measurement
No matter how many diagrams they see of pizzas divided into slices, students have persistent difficulties with understanding fractions. What does a fraction mean? Where do the rules for fraction arithmetic come from? What does multiplication, or division, of fractions represent? What is the role of “proportional reasoning” in all this? What is the significance of the rational number system whic...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2009
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.80.052005