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Physical Review Letters | 2010

Indication of a deeply bound and compact K- pp state formed in the pp- -> pLambdaK+ reaction at 2.85 GeV.

T. Yamazaki; M. Maggiora; P. Kienle; K. Suzuki; A. Amoroso; M. Alexeev; F. Balestra; Y. Bedfer; R. Bertini; L.C. Bland; A. Brenschede; F. Brochard; M. P. Bussa; Seonho Choi; M. L. Colantoni; Dressler R; M. Dzemidzic; Jc Faivre; L. Ferrero; J. Foryciarz; Fröhlich I; Frolov; R. Garfagnini; A. Grasso; S. Heinz; W. W. Jacobs; W. Kühn; A. Maggiora; D. Panzieri; H.-W. Pfaff

We have analyzed data of the DISTO experiment on the exclusive pp --> pLambdaK+ reaction at 2.85 GeV to search for a strongly bound compact K- pp(approximately = X) state to be formed in the pp --> K+ + X reaction. The observed spectra of the K+ missing mass and the pLambda invariant-mass with high transverse momenta of p and K+ revealed a broad distinct peak of 26-sigma confidence with a mass M(X)=2267+/-3(stat)+/-5(syst) MeV/c2 and a width Gamma(X)=118+/-8(stat)+/-10(syst) MeV. The enormously large cross section indicates formation of a compact K- pp with a large binding energy of B(K)=103 MeV, which can be a possible gateway toward cold and dense kaonic nuclear matter.


Physical Review C | 2000

phi and omega meson production in p p reactions at p(lab) = 3.67-GeV/c

F. Balestra; V. Chalyshev; R. Bertini; A. Manara; M. P. Bussa; V. Frolov; F. Brochard; A. Grasso; L. Ferrero; E. Grosse; M. Debowski; A. Popov; J. Ritman; A. Maggiora; S. E. Vigdor; J.-Cl. Faivre; Seonho Choi; I. V. Falomkin; Y. Bedfer; G. Piragino; M. Maggiora; A. Brenschede; V.V. Ivanov; I. Fröhlich; G. Zosi; S. Heinz; H.-W. Pfaff; J. Foryciarz; P. Salabura; G. B. Pontecorvo

The exclusive production cross sections for


Physics Letters B | 2000

Antiproton–neon annihilation at 57 MeV/c

A. Bianconi; G. Bonomi; M.P. Bussa; E. Lodi Rizzini; L. Venturelli; A. Zenoni; G. B. Pontecorvo; C. Guaraldo; F. Balestra; L. Busso; M. Colantoni; A. Ferrero; L. Ferrero; A. Grasso; A. Maggiora; M. Maggiora; G. Piragino; F. Tosello

\omega


Physics Letters B | 1999

K- meson production in the proton proton reaction at 3.67-GeV/c

F. Balestra; Y. Bedfer; R. Bertini; L.C. Bland; A. Brenschede; F. Brochard; M. P. Bussa; V. Tchalyshev; Seonho Choi; M. Debowski; M. Dzemidzic; J.-Cl. Faivre; I. V. Falomkin; L. Fava; L. Ferrero; J. Foryciarz; I. Fröhlich; V. Frolov; R. Garfagnini; D. R. Gill; A. Grasso; E. Grosse; S. Heinz; V.V. Ivanov; W.W. Jacobs; W. Kühn; A. Maggiora; M. Maggiora; A. Manara; D. Panzieri

and


European Physical Journal A | 2012

Formation of the

P. Kienle; M. Maggiora; K. Suzuki; Toshimitsu Yamazaki; M. Alexeev; F. Balestra; Y. Bedfer; R. Bertini; L.C. Bland; A. Brenschede; F. Brochard; M. P. Bussa; M. Chiosso; Seonho Choi; M. L. Colantoni; R. Dressler; M. Dzemidzic; J.-Cl. Faivre; A. Ferrero; L. Ferrero; J. Foryciarz; I. Fröhlich; V. Frolov; R. Garfagnini; A. Grasso; S. Heinz; W.W. Jacobs; W. Kühn; A. Maggiora; D. Panzieri

\phi


Nuclear Physics | 2010

S=-1

M. Maggiora; P. Kienle; K. Suzuki; Toshimitsu Yamazaki; M. Alexeev; A. Amoroso; F. Balestra; Y. Bedfer; R. Bertini; L.C. Bland; A. Brenschede; F. Brochard; M. P. Bussa; Seonho Choi; M. L. Colantoni; R. Dressler; M. Dzemidzic; J.-Cl. Faivre; L. Ferrero; J. Foryciarz; I. Fröhlich; V. Frolov; R. Garfagnini; A. Grasso; S. Heinz; W.W. Jacobs; W. Kühn; A. Maggiora; D. Panzieri; S. Sosio

mesons have been measured in proton-proton reactions at


Physical Review Letters | 2002

resonance X(2265) in the reaction

F. Balestra; Y. Bedfer; R. Bertini; L. C. Bland; A. Brenschede; F. Brochard; M. P. Bussa; Seonho Choi; Colantoni Ml; Dressler R; M. Dzemidzic; Jc Faivre; Ferrero A; L. Ferrero; J. Foryciarz; Fröhlich I; Frolov; R. Garfagnini; A. Grasso; S. Heinz; W. W. Jacobs; W. Kühn; A. Maggiora; M. Maggiora; A. Manara; D. Panzieri; H.-W. Pfaff; G. Piragino; A. Popov; J. Ritman

p_{lab}=3.67


Nuclear Physics | 2000

pp -> X + K^+

M. Maggiora; F. Balestra; Y. Bedfer; R. Bertini; L.C. Bland; F. Brochard; M. P. Bussa; V. Chalyshev; Seonho Choi; M. Debowski; M. Dzemidzic; J.-Cl. Faivre; I. V. Falomkin; L. Fava; L. Ferrero; J. Foryciarz; V. Frolov; I. Fröhlich; R. Garfagnini; D. R. Gill; A. Grasso; S. Heinz; V.V. Ivanov; W.W. Jacobs; W. Kühn; A. Maggiora; A. Manara; D. Panzieri; H.-W. Pfaff; G. Piragino

GeV/c. The observed


Czechoslovak Journal of Physics | 2005

at 2.50 and 2.85 GeV

M. Maggiora; V. Abazov; G. D. Alexeev; M. Alexeev; A. Amoroso; N. Angelov; S. Baginyan; F. Balestra; I. Belolaptikov; R. Bertini; A. Bianconi; R. Birsa; T. Blokhintseva; A. Bonyushkina; F. Bradamante; A. Bressan; V. Butenko; M. Colantoni; M. Corradini; S. Dalla Torre; A. Demyanov; O. Denisov; V. Drozdov; J. Dupak; G. Erusalimtsev; L. Fava; A. Ferrero; L. Ferrero; M. Finger; V. Frolov

\phi/\omega


nuclear science symposium and medical imaging conference | 1998

DISTO data on K pp

F. Balestra; Y. Bedfer; R. Bertini; L.C. Bland; A. Brenschede; F. Brochard; M.P. Bussa; S. Choi; M. Debowski; M. Dzemidzic; I.V. Falomkin; J.C. Faivre; L. Fava; L. Ferrero; J. Foryciarz; V. Frolov; R. Garfagnini; D. Gill; A. Grasso; E. Grosse; W.W. Jacobs; W. Kuhn; A. Maggiora; M. Maggiora; A. Manara; D. Panzieri; H. Pfaff; G. Piragino; G. B. Pontecorvo; A.A. Popov

cross section ratio is

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