Diffractive Pion Dissociation into π[sup −]π[sup +]π[sup −]π[sup +]π[sup −] at COMPASS | Zendy

S. Neubert | Zendy; Volker Crede | Zendy; P. Eugenio | Zendy; A. Ostrovidov | Zendy

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Diffractive Pion Dissociation into π[sup −]π[sup +]π[sup −]π[sup +]π[sup −] at COMPASS

Author(s) -

S. Neubert,

Volker Crede,

P. Eugenio,

A. Ostrovidov

Publication year - 2010

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.3483337

Subject(s) - pion , physics , dissociation (chemistry) , nuclear physics , invariant mass , momentum transfer , spectral line , atomic physics , particle physics , scattering , chemistry , optics , astronomy

At the COMPASS experiment a sample of ∼380000 exclusive events of diffractive pion dissociation on a lead target into a π−π+π−π+π− final state has been recorded in 2004. The 5π invariant mass spectrum shows a momentum transfer dependent structure peaking around 1.8 GeV/c2. In the (4π)0 subsystem there is a clear signal for the f1(1285) resonance decaying into 4 pions. In this note we describe the data sample and explore the physics potential of this final state.

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