Results 211 to 220 of about 140,238 (256)

Computing \(\psi(x)\)

Math. Comput., 1998
Summary: ``Let \(\Lambda\) denote the von Mangoldt function and \(\psi(x)=\sum_{n \leq x} \Lambda(n)\). We describe an elementary method for computing isolated values of \(\psi(x)\). The complexity of the algorithm is \(O(x^{2/3}(\log\log x)^{1/3})\) time and \(O(x^{1/3}(\log\log x)^{2/3})\) space. A table of values of \(\psi(x)\) for \(x\) up to \(10^{
Deléglise, Marc, Rivat, Joel
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Measurement of the branching ratios psi'->e(+)e(-), psi'->J/psi pi pi, and psi'->J/psi eta

1997
We have observed exclusive decays of the [Formula presented] in an experiment where the [Formula presented] is formed in antiproton-proton annihilations. We report the branching ratios [Formula presented], [Formula presented] [Formula presented] [Formula presented]. © 1997 The American Physical Society.
ARMSTRONG TA   +66 more
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Measurement of the branching ratios psi(')-> e(+)e(-), psi '-> J/psi pi pi, and psi '-> J/psi eta

2005
We have measured several branching ratios for psi(') decay using the data collected by the FNAL E835 experiment during the year 2000, obtaining B(psi(')-->e(+)e(-))=0.0068+/-0.0001+/-0.0004, B(psi(')-->J/psipi(+)pi(-))=0.292+/-0.005+/-0.018, B(psi(')-->J/psipi(0)pi(0))=0.167+/-0.005+/-0.014, and B(psi(')-->J/psieta)=0.028+/-0.002+/-0.002.
ANDREOTTI, Mirco   +49 more
openaire   +1 more source

Chimie - PSI/PSI*

2022
Bruno Fosset   +2 more
openaire   +1 more source

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