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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2008, Volume 87, Issue 3, Pages 147–149
(Mi jetpl26)
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This article is cited in 23 scientific papers (total in 23 papers)
FIELDS, PARTICLES, AND NUCLEI
Di-pion emission in heavy quarkonia decays
Yu. A. Simonov State Research Center Institute of Theoretical and Experimental Physics, Moscow, 117218, Russia
Abstract:
The di-pion spectrum for the $\Upsilon(nS)\to\Upsilon (n'S)$ transition with $n\le4$ has the form ${dw}/{dq}\sim$ (phase space) $|\eta-x|^2$, with $x=\frac{q^2-4m^2_\pi}{(\Delta M)^2-4m^2_\pi}<q^2\equiv M^2_{\pi\pi}$, and $\Delta M=M(nS)-M(n'S)$. The parameter $\eta$ is calculated and the spectrum is shown to reproduce the experimental data for all 3 types of decays: $3\to 1,2\to1$ and $3\to2$ with $\eta\approx0.5;0$, and $-3$, respectively.
Received: 13.12.2007
Citation:
Yu. A. Simonov, “Di-pion emission in heavy quarkonia decays”, Pis'ma v Zh. Èksper. Teoret. Fiz., 87:3 (2008), 147–149; JETP Letters, 87:3 (2008), 121–123
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https://www.mathnet.ru/eng/jetpl26 https://www.mathnet.ru/eng/jetpl/v87/i3/p147
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Abstract page: | 199 | Full-text PDF : | 74 | References: | 34 |
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