Annihilation of $\bar p+p\to e^++e^-+ \pi^0$ and $\bar p+p\to \gamma + \pi^0$ through $\omega$-meson intermediate state

E. A. Kuraev; Yu. M. Bystritskiy; V. V. Bytev; A. Dbeyssi; E. Tomasi-Gustafsson

HAL : in2p3-00710553, version 1

arXiv : 1012.5720

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Annihilation of $\bar p+p\to e^++e^-+ \pi^0$ and $\bar p+p\to \gamma + \pi^0$ through $\omega$-meson intermediate state

E. A. Kuraev, Yu. M. Bystritskiy, V. V. Bytev, A. Dbeyssi¹, E. Tomasi-Gustafsson¹

(2012)

The s-channel annihilation of proton and antiproton into a neutral pion and a real or virtual photon followed by lepton pair emission is studied. Such mechanism is expected to play a role at moderate values of the total energy $\sqrt{s}$, when the pion is emitted around $90^{\circ}$ in the center of mass. A fair comparison with the existing data is obtained taking into account scattering and annihilation channels. The cross section is calculated and numerical results are given in the kinematical range accessible in the PANDA experiment at FAIR.

1 :	IPNO - Institut de Physique Nucléaire d'Orsay

Thème(s)

Physique/Physique des Hautes Energies - Phénoménologie

Physique/Physique Nucléaire Théorique

Lien vers le texte intégral :

http://fr.arXiv.org/abs/1012.5720


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Contributeur : Sophie Heurteau <>
Soumis le : Jeudi 21 Juin 2012, 10:12:13
Dernière modification le : Jeudi 21 Juin 2012, 11:24:37