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2 results on '"*DECAY schemes (Radioactivity)"'

1. RESONANCE PARTICLES.

Author

Hill, R. D.

Subjects
PARTICLES (Nuclear physics), PROPERTIES of matter, DECAY schemes (Radioactivity), NUCLEAR physics, RESEARCH
Abstract

The article focuses on resonance particles which is described as particles that decay even more quickly compared to the 32 fundamental particles. The fundamental particles decay in about a ten-billionth of a second while resonance particles decay in about the time it takes for light to move a distance equal to a few diameters of an atomic nucleus or a measure of hundred-thousandths of a billion-billionth of a second. The first resonance particle experiment was performed by the bubble-chamber group at the Lawrence Radiation Laboratory in 1960 in California.

Published
1963
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2. Radiative penguin decays at BABAR.

Author

Ryd, Anders

Subjects
*DECAY schemes (Radioactivity), *RADIATIVE transitions, *BRANCHING ratios, *LINEAR accelerators
Abstract

We report preliminary results based on a data sample of 20.7 fb[sup -1] recorded at the ϒ(4S) resonance by the BABAR detector at the PEP-II energy asymmetric collider at the Stanford Linear Accelerator Center. We have measured the branching fraction B(B[sup 0] → K[sup *]γ) = (4.39 ± 0.41 ± 0.27) × 10[sup -5] and measured a charge asymmetry in the B → K[sup *]γ decays consistent with zero: A[sub CP] = -0.035 ± 0.076 ± 0.012. We also searched for the decay B[sup 0] → γγ and placed the 90% C.L. limit B(B[sup 0] → γγ) < 1.7 × 10[sup -6]. The search for the electroweak penguin decays B → K (*)l[sup +]l[sup -] yielded the limits B(B → Kl[sup +]l[sup -]) < 0.6 × 10[sup -6] and B(B → K[sup *]l[sup +]l[sup -]) < 2.5 × 10[sup -6] at the 90% C.L. [ABSTRACT FROM AUTHOR]

Published
2002

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