Production of the F0 Meson in the Double Pomeron Exchange Reaction $p p \to p p \pi^+ \pi^-$ at $\sqrt{s}=62$-{GeV}

The Ames-Bologna-CERN-Dortmund-Heidelberg-Warsaw collaboration Breakstone, A. ; Campanini, R. ; Crawley, H.B. ; et al.
Z.Phys.C 31 (1986) 185, 1986.
Inspire Record 227129 DOI 10.17182/hepdata.15893

Data are presented for the exclusive reaction pp → pp π+ π− at\(\sqrt s= 62GeV\) with two leading protons at large Feynman-x and a centrally produced π+;π− system. In this kinematical configuration one expects a substantial contribution from Double Pomeron Exchange, which is a potential source of glueballs. The experiment was performed at the CERN ISR using the Split Field Magnet spectrometer. In the mass range between 1,000 and 1,700 MeV/c2 the invariant mass distribution for the central π+;π− system exhibits a very significant signal for thef0(1270) and no other obvious resonant states.

1 data table

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THE REACTIONS P P ---> P P PI+ PI-, K+ P ---> K+ P PI+ PI-, PI+ P ---> PI+ P PI+ PI- AND PI- P ---> PI- P PI+ PI- AT 147-GeV/c

Brick, D.H. ; Rudnicka, H. ; Shapiro, A.M. ; et al.
Z.Phys.C 19 (1983) 1-9, 1983.
Inspire Record 194363 DOI 10.17182/hepdata.16321

We have studied the reactionspp→ppπ+π-,K+p→K+pπ+π−π, π+p→ π+,pπ+π− and π−p →π+π− at 147 GeV/c using the 30-inch Fermilab hybrid system. All four reactions were detected with the same apparatus and analyzed in the same way. The energy dependence of the channel cross section was found to beAp−0.6+B for thepp reaction andAp−1+B for the other three. About 90% of the cross section at 147 GeV/c can be accounted for by either beam or target diffraction. Some of the remaining cross section may come from double Pomeron exchange reactions which we tried to isolate. We have tested the hypothesis of a factorizable Pomeron and our data indicates a violation of this hypothesis. We show that the 3π mass enhancement in the mass region 1.2–1.4 GeV is diffractively produced in the π± beam reactions. Fourprong, four-constraint and six-prong, four-constraint cross sections are reported.

6 data tables

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CROSS SECTIONS FOR DIFFRACTION DISSOCIATION OF BEAM. FEYNMAN X OF OUTGOING PROTON <-0.96.

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STUDY OF ASSOCIATED PRODUCTION OF DELTA++ AND DELTA0 ISOBARS IN P P ---> P P PI+ PI- REACTION AT THE MOMENTUM OF 4-GEV/. (IN RUSSIAN)

Beketov, G.V. ; Vanyushin, I.A. ; Ergakov, V.A. ; et al.
Yad.Fiz. 33 (1981) 1036-1045, 1981.
Inspire Record 170099 DOI 10.17182/hepdata.17864

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34 data tables

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ANALYSIS OF THE REACTION P P ---> DELTA++ P PI- AT THE MOMENTUM OF 4-GEV/. (IN RUSSIAN)

Beketov, G.V. ; Vanyushin, I.A. ; Ergakov, V.A. ; et al.
Yad.Fiz. 31 (1980) 386-395, 1980.
Inspire Record 157174 DOI 10.17182/hepdata.18181

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34 data tables

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