Study of n̄p → øπ+ and n̄p → ωπ+ annihilation reactions in flight: The OBELIX collaboration

A. Filippi; M. Agnello; F. Balestra; D. Bergo; E. Botta; T. Bressani; M. P. Bussa; L. Busso; D. Calvo; P. Cerello; S. Costa; O. Denisov; C. Fanara; A. Feliciello; L. Ferrero; R. Garfagnini; A. Grasso; F. Iazzi; A. Maggiora; S. Marcello; B. Minetti; N. Mirfakhraee; A. Panzarasa; D. Panzieri; A. Raimondo; F. Tosello; L. Valacca; G. Zosi; V. Alberico; A. Bertin; M. Bruschi; M. Capponi; S. De Castro; R. Donà; A. Ferretti; D. Galli; B. Giacobbe; U. Marconi; M. Piccinini; M. Poli; N. Semprini Cesari; R. Spighi; V. Vagnoni; S. Vecchi; F. Vigotti; M. Villa; A. Vitale; A. Zoccoli; M. Corradini; A. Donzella; E. Lodi Rizzini; L. Venturelli; A. Zenoni; C. Cicalò; A. Masoni; S. Mauro; G. Puddu; S. Serci; P. Temnikov; G. Usai; O. E. Gorchakov; S. N. Prakhov; A. M. Rozhdestvensky; M. G. Sapozhnikov; I. Tretyak V; P. Gianotti; C. Guaraldo; A. Lanaro; V. Lucherini; F. Nichitiu; C. Petrascu; V. Ableev; C. Cavion; U. Gastaldi; M. Lombardi; G. Maron; L. Vannucci; G. Vedovato; G. Bendiscioli; V. Filippini; A. Fontana; P. Montagna; A. Rotondi; P. Salvini; C. Scoglio; G. Pauli; S. Tessaro; L. Santi

doi:10.1016/S0375-9474(99)00157-8

Study of n̄p → øπ⁺ and n̄p → ωπ⁺ annihilation reactions in flight: The OBELIX collaboration

A. Filippi, M. Agnello, F. Balestra, D. Bergo, E. Botta, T. Bressani, M. P. Bussa, L. Busso, D. Calvo, P. Cerello, S. Costa, O. Denisov, C. Fanara, A. Feliciello, L. Ferrero, R. Garfagnini, A. Grasso, F. Iazzi, A. Maggiora, S. MarcelloB. Minetti, N. Mirfakhraee, A. Panzarasa, D. Panzieri, A. Raimondo, F. Tosello, L. Valacca, G. Zosi, V. Alberico, A. Bertin, M. Bruschi, M. Capponi, S. De Castro, R. Donà, A. Ferretti, D. Galli, B. Giacobbe, U. Marconi, M. Piccinini, M. Poli, N. Semprini Cesari, R. Spighi, V. Vagnoni, S. Vecchi, F. Vigotti, M. Villa, A. Vitale, A. Zoccoli, M. Corradini, A. Donzella, E. Lodi Rizzini, L. Venturelli, A. Zenoni, C. Cicalò, A. Masoni, S. Mauro, G. Puddu, S. Serci, P. Temnikov, G. Usai, O. E. Gorchakov, S. N. Prakhov, A. M. Rozhdestvensky, M. G. Sapozhnikov, I. Tretyak V, P. Gianotti, C. Guaraldo, A. Lanaro, V. Lucherini, F. Nichitiu, C. Petrascu, V. Ableev, C. Cavion, U. Gastaldi, M. Lombardi, G. Maron, L. Vannucci, G. Vedovato, G. Bendiscioli, V. Filippini, A. Fontana, P. Montagna, A. Rotondi, P. Salvini, C. Scoglio, G. Pauli, S. Tessaro, L. Santi

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

The results of a study of the annihilation reactions n̄p → øπ⁺ and n̄p → ωπ⁺ are reported; the data were collected by the OBELIX apparatus, with antineutrons annihilating in flight (momenta from ̃ 50 MeV/c to 405 MeV/c). Annihilation frequencies and annihilation cross sections have been deduced, for both channels, as a function of antineutron momentum. From the cross section ratio, a substantial deviation from OZI rule expectations is observed. An s̄s quark content in the nucleon offers a fairly plausible explanation for such an effect.

Lingua originale	Inglese
pagine (da-a)	453-494
Numero di pagine	42
Rivista	Nuclear Physics A
Volume	655
Numero di pubblicazione	3-4
DOI	https://doi.org/10.1016/S0375-9474(99)00157-8
Stato di pubblicazione	Pubblicato - 16 ago 1999
Pubblicato esternamente	Sì

Accesso al documento

10.1016/S0375-9474(99)00157-8

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Cita questo

Filippi, A., Agnello, M., Balestra, F., Bergo, D., Botta, E., Bressani, T., Bussa, M. P., Busso, L., Calvo, D., Cerello, P., Costa, S., Denisov, O., Fanara, C., Feliciello, A., Ferrero, L., Garfagnini, R., Grasso, A., Iazzi, F., Maggiora, A., ... Santi, L. (1999). Study of n̄p → øπ⁺ and n̄p → ωπ⁺ annihilation reactions in flight: The OBELIX collaboration. Nuclear Physics A, 655(3-4), 453-494. https://doi.org/10.1016/S0375-9474(99)00157-8

@article{d3c1d3fce46b4e1d9763617228b13e36,

title = "Study of {\=n}p → {\o}π+ and {\=n}p → ωπ+ annihilation reactions in flight: The OBELIX collaboration",

abstract = "The results of a study of the annihilation reactions {\=n}p → {\o}π+ and {\=n}p → ωπ+ are reported; the data were collected by the OBELIX apparatus, with antineutrons annihilating in flight (momenta from{\~ } 50 MeV/c to 405 MeV/c). Annihilation frequencies and annihilation cross sections have been deduced, for both channels, as a function of antineutron momentum. From the cross section ratio, a substantial deviation from OZI rule expectations is observed. An {\=s}s quark content in the nucleon offers a fairly plausible explanation for such an effect.",

keywords = "Antineutron-proton annihilation in flight, Measured {\o}-ω production, absolute annihilation frequencies, elementary branching ratios, cross sections, OBELIX spectrometer, OZI rule violation and strange content of the nucleon",

author = "A. Filippi and M. Agnello and F. Balestra and D. Bergo and E. Botta and T. Bressani and Bussa, {M. P.} and L. Busso and D. Calvo and P. Cerello and S. Costa and O. Denisov and C. Fanara and A. Feliciello and L. Ferrero and R. Garfagnini and A. Grasso and F. Iazzi and A. Maggiora and S. Marcello and B. Minetti and N. Mirfakhraee and A. Panzarasa and D. Panzieri and A. Raimondo and F. Tosello and L. Valacca and G. Zosi and V. Alberico and A. Bertin and M. Bruschi and M. Capponi and {De Castro}, S. and R. Don{\`a} and A. Ferretti and D. Galli and B. Giacobbe and U. Marconi and M. Piccinini and M. Poli and Cesari, {N. Semprini} and R. Spighi and V. Vagnoni and S. Vecchi and F. Vigotti and M. Villa and A. Vitale and A. Zoccoli and M. Corradini and A. Donzella and Rizzini, {E. Lodi} and L. Venturelli and A. Zenoni and C. Cical{\`o} and A. Masoni and S. Mauro and G. Puddu and S. Serci and P. Temnikov and G. Usai and Gorchakov, {O. E.} and Prakhov, {S. N.} and Rozhdestvensky, {A. M.} and Sapozhnikov, {M. G.} and {Tretyak V}, I. and P. Gianotti and C. Guaraldo and A. Lanaro and V. Lucherini and F. Nichitiu and C. Petrascu and V. Ableev and C. Cavion and U. Gastaldi and M. Lombardi and G. Maron and L. Vannucci and G. Vedovato and G. Bendiscioli and V. Filippini and A. Fontana and P. Montagna and A. Rotondi and P. Salvini and C. Scoglio and G. Pauli and S. Tessaro and L. Santi",

year = "1999",

month = aug,

day = "16",

doi = "10.1016/S0375-9474(99)00157-8",

language = "English",

volume = "655",

pages = "453--494",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier",

number = "3-4",

}

Filippi, A, Agnello, M, Balestra, F, Bergo, D, Botta, E, Bressani, T, Bussa, MP, Busso, L, Calvo, D, Cerello, P, Costa, S, Denisov, O, Fanara, C, Feliciello, A, Ferrero, L, Garfagnini, R, Grasso, A, Iazzi, F, Maggiora, A, Marcello, S, Minetti, B, Mirfakhraee, N, Panzarasa, A, Panzieri, D, Raimondo, A, Tosello, F, Valacca, L, Zosi, G, Alberico, V, Bertin, A, Bruschi, M, Capponi, M, De Castro, S, Donà, R, Ferretti, A, Galli, D, Giacobbe, B, Marconi, U, Piccinini, M, Poli, M, Cesari, NS, Spighi, R, Vagnoni, V, Vecchi, S, Vigotti, F, Villa, M, Vitale, A, Zoccoli, A, Corradini, M, Donzella, A, Rizzini, EL, Venturelli, L, Zenoni, A, Cicalò, C, Masoni, A, Mauro, S, Puddu, G, Serci, S, Temnikov, P, Usai, G, Gorchakov, OE, Prakhov, SN, Rozhdestvensky, AM, Sapozhnikov, MG, Tretyak V, I, Gianotti, P, Guaraldo, C, Lanaro, A, Lucherini, V, Nichitiu, F, Petrascu, C, Ableev, V, Cavion, C, Gastaldi, U, Lombardi, M, Maron, G, Vannucci, L, Vedovato, G, Bendiscioli, G, Filippini, V, Fontana, A, Montagna, P, Rotondi, A, Salvini, P, Scoglio, C, Pauli, G, Tessaro, S & Santi, L 1999, 'Study of n̄p → øπ⁺ and n̄p → ωπ⁺ annihilation reactions in flight: The OBELIX collaboration', Nuclear Physics A, vol. 655, n. 3-4, pagg. 453-494. https://doi.org/10.1016/S0375-9474(99)00157-8

TY - JOUR

T1 - Study of n̄p → øπ+ and n̄p → ωπ+ annihilation reactions in flight

T2 - The OBELIX collaboration

AU - Filippi, A.

AU - Agnello, M.

AU - Balestra, F.

AU - Bergo, D.

AU - Botta, E.

AU - Bressani, T.

AU - Bussa, M. P.

AU - Busso, L.

AU - Calvo, D.

AU - Cerello, P.

AU - Costa, S.

AU - Denisov, O.

AU - Fanara, C.

AU - Feliciello, A.

AU - Ferrero, L.

AU - Garfagnini, R.

AU - Grasso, A.

AU - Iazzi, F.

AU - Maggiora, A.

AU - Marcello, S.

AU - Minetti, B.

AU - Mirfakhraee, N.

AU - Panzarasa, A.

AU - Panzieri, D.

AU - Raimondo, A.

AU - Tosello, F.

AU - Valacca, L.

AU - Zosi, G.

AU - Alberico, V.

AU - Bertin, A.

AU - Bruschi, M.

AU - Capponi, M.

AU - De Castro, S.

AU - Donà, R.

AU - Ferretti, A.

AU - Galli, D.

AU - Giacobbe, B.

AU - Marconi, U.

AU - Piccinini, M.

AU - Poli, M.

AU - Cesari, N. Semprini

AU - Spighi, R.

AU - Vagnoni, V.

AU - Vecchi, S.

AU - Vigotti, F.

AU - Villa, M.

AU - Vitale, A.

AU - Zoccoli, A.

AU - Corradini, M.

AU - Donzella, A.

AU - Rizzini, E. Lodi

AU - Venturelli, L.

AU - Zenoni, A.

AU - Cicalò, C.

AU - Masoni, A.

AU - Mauro, S.

AU - Puddu, G.

AU - Serci, S.

AU - Temnikov, P.

AU - Usai, G.

AU - Gorchakov, O. E.

AU - Prakhov, S. N.

AU - Rozhdestvensky, A. M.

AU - Sapozhnikov, M. G.

AU - Tretyak V, I.

AU - Gianotti, P.

AU - Guaraldo, C.

AU - Lanaro, A.

AU - Lucherini, V.

AU - Nichitiu, F.

AU - Petrascu, C.

AU - Ableev, V.

AU - Cavion, C.

AU - Gastaldi, U.

AU - Lombardi, M.

AU - Maron, G.

AU - Vannucci, L.

AU - Vedovato, G.

AU - Bendiscioli, G.

AU - Filippini, V.

AU - Fontana, A.

AU - Montagna, P.

AU - Rotondi, A.

AU - Salvini, P.

AU - Scoglio, C.

AU - Pauli, G.

AU - Tessaro, S.

AU - Santi, L.

PY - 1999/8/16

Y1 - 1999/8/16

N2 - The results of a study of the annihilation reactions n̄p → øπ+ and n̄p → ωπ+ are reported; the data were collected by the OBELIX apparatus, with antineutrons annihilating in flight (momenta from ̃ 50 MeV/c to 405 MeV/c). Annihilation frequencies and annihilation cross sections have been deduced, for both channels, as a function of antineutron momentum. From the cross section ratio, a substantial deviation from OZI rule expectations is observed. An s̄s quark content in the nucleon offers a fairly plausible explanation for such an effect.

AB - The results of a study of the annihilation reactions n̄p → øπ+ and n̄p → ωπ+ are reported; the data were collected by the OBELIX apparatus, with antineutrons annihilating in flight (momenta from ̃ 50 MeV/c to 405 MeV/c). Annihilation frequencies and annihilation cross sections have been deduced, for both channels, as a function of antineutron momentum. From the cross section ratio, a substantial deviation from OZI rule expectations is observed. An s̄s quark content in the nucleon offers a fairly plausible explanation for such an effect.

KW - Antineutron-proton annihilation in flight

KW - Measured ø-ω production, absolute annihilation frequencies, elementary branching ratios, cross sections

KW - OBELIX spectrometer

KW - OZI rule violation and strange content of the nucleon

UR - http://www.scopus.com/inward/record.url?scp=0033575635&partnerID=8YFLogxK

U2 - 10.1016/S0375-9474(99)00157-8

DO - 10.1016/S0375-9474(99)00157-8

M3 - Article

SN - 0375-9474

VL - 655

SP - 453

EP - 494

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 3-4