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Your search keyword '"Kudryavtsev, A.E."' showing total 18 results
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18 results on '"Kudryavtsev, A.E."'

1. The multiple-scattering series in few-nucleon systems

Author

Baru V., Epelbaum E., Hanhart C., Hoferichter M., Kudryavtsev A.E., and Phillips D.R.

Subjects
Physics, QC1-999
Abstract

We discuss under which circumstances the resummation of the multiple-scattering series is justified from an EFT point of view. The application to πd and K̅d scattering is briefly discussed.

Published
2014
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2. Progress on Neutron-Target Multipoles above 1 GeV

Author

Rossi P., Paris M., Mirazite M., Kudryavtsev A.E., Dutta D., Briscoe W.J., Gao H., Chen W., Strakovsky I.I., Stepanyan S., Tarasov V.E., and Workman R.L.

Subjects
Physics, QC1-999
Abstract

We report a new extraction of nucleon resonance couplings using π− photo-production cross sections on the neutron. The world database for the process γn → π−p above 1 GeV has quadrupled with the addition of new differential cross sections from the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab in Hall B. Differential cross sections from CLAS have been improved with a new final-state interaction determination using a diagrammatic technique taking into account the SAID phenomenological NN and πN final-state interaction amplitudes. Resonance couplings have been extracted and compared to previous determinations. With the addition of these new cross sections, significant changes are seen in the high-energy behavior of the SAID cross sections and amplitudes.

Published
2012
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3. Differential cross section measurements for $\gamma n\rightarrow{\pi}^{-}p$ above the first nucleon resonance region

Author

Mattione, P.T., Carman, D.S., Strakovsky, I.I., Workman, R.L., Kudryavtsev, A.E., Svarc, A., Tarasov, V.E., Adhikari, K.P., Adhikari, S., Adikaram, D., Akbar, Z., Anefalos Pereira, S., Ball, J., Baltzell, N.A., Bashkanov, M., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A.S., Boiarinov, S., Briscoe, W.J., Burkert, V.D., Cao, T., Celentano, A., Charles, G., Chetry, T., Ciullo, G., Clark, L., Cole, P.L., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Defurne, M., Deur, A., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Eugenio, P., Fedotov, G., Fersch, R., Filippi, A., Fleming, J.A., Fradi, A., Ghandilyan, Y., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Gleason, C., Golovatch, E., Gothe, R.W., Griffioen, K.A., Guidal, M., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Hollis, G., Holtrop, M., Hughes, S.M., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Jenkins, D., Jiang, H., Jo, H.S., Joo, K., Joosten, S., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F.J., Kubarovsky, V., Kuleshov, S.V., Lanza, L., Lenisa, P., Livingston, K., Macgregor, I.J.D., Markov, N., Mckinnon, B., Meyer, C.A., Meziani, Z.E., Mineeva, T., Mokeev, V., Montgomery, R.A., Movsisyan, A, Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Net, L.A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A.I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pisano, S., Pogorelko, O., Price, J.W., Procureur, S., Prok, Y., Protopopescu, D., Raue, B.A., Ripani, M., Ritchie, B.G., Rizzo, A., Rosner, G., Sabatié, F., Salgado, C., Schumacher, R.A., Sharabian, Y.G., Simonyan, A., Skorodumina, Iu., Smith, G.D., Sokhan, D., Sparveris, N., Stankovic, I., Stepanyan, S., Strauch, S., Taiuti, M., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N.K., Watts, D, Wei, X., Wood, M.H., Zachariou, N., Zhang, J., Zhao, Z.W., Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CLAS, Département de Physique Nucléaire (ex SPhN) ( DPHN ), Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay ( IPNO ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
N(1720), Astrophysics::High Energy Astrophysical Phenomena, nucleon resonance, momentum, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, pi-: photoproduction, tagged beam, bremsstrahlung, CLAS, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], electron: beam, Nuclear Experiment, numerical calculations, photon: beam, photon: decay, resonance: pole, K-matrix, N(1440), N(1650), 0.445-2.510 GeV, N(1535), final-state interaction, differential cross section, High Energy Physics::Experiment, deuteron: target, particle identification, Jefferson Lab, experimental results
Abstract

The quasi-free $\gamma d\to\pi^{-}p(p)$ differential cross section has been measured with CLAS at photon beam energies $E_\gamma$ from 0.445 GeV to 2.510 GeV (corresponding to $W$ from 1.311 GeV to 2.366 GeV) for pion center-of-mass angles $\cos\theta_\pi^{c.m.}$ from -0.72 to 0.92. A correction for final state interactions has been applied to this data to extract the $\gamma n\to\pi^-p$ differential cross sections. These cross sections are quoted in 8428 $(E_\gamma,\cos\theta_\pi^{c.m.})$ bins, a factor of nearly three increase in the world statistics for this channel in this kinematic range. These new data help to constrain coupled-channel analysis fits used to disentangle the spectrum of $N^*$ resonances and extract their properties. Selected photon decay amplitudes $N^* \to \gamma n$ at the resonance poles are determined for the first time and are reported here.

Published
2017
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4. Progress on Neutron-Target Multipoles above 1 GeV

Author

Strakovsky, I.I., primary, Chen, W., additional, Gao, H., additional, Briscoe, W.J., additional, Dutta, D., additional, Kudryavtsev, A.E., additional, Mirazite, M., additional, Paris, M., additional, Rossi, P., additional, Stepanyan, S., additional, Tarasov, V.E., additional, and Workman, R.L., additional

Published
2012
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7. Contribution from and waves in annihilation at rest

Author

Bendiscioli, G., primary, Filippini, V., additional, Fontana, A., additional, Montagna, P., additional, Rotondi, A., additional, Salvini, P., additional, Bertin, A., additional, Bruschi, M., additional, Capponi, M., additional, De Castro, S., additional, Dona', R., additional, Galli, D., additional, Giacobbe, B., additional, Marconi, U., additional, Massa, I., additional, Piccinini, M., additional, Semprini Cesari, N., additional, Spighi, R., additional, Vecchi, S., additional, Vagnoni, V., additional, Villa, M., additional, Vitale, A., additional, Zoccoli, A., additional, Bianconi, A., additional, Bonomi, G., additional, Lodi Rizzini, E., additional, Venturelli, L., additional, Zenoni, A., additional, Cicalò, C., additional, De Falco, A., additional, Masoni, A., additional, Puddu, G., additional, Serci, S., additional, Usai, G., additional, Gorchakov, O.E., additional, Prakhov, S.N., additional, Rozhdestvensky, A.M., additional, Tretyak, V.I., additional, Poli, M., additional, Gianotti, P., additional, Guaraldo, C., additional, Lanaro, A., additional, Lucherini, V., additional, Petrascu, C., additional, Kudryavtsev, A.E., additional, Balestra, F., additional, Bussa, M.P., additional, Busso, L., additional, Cerello, P., additional, Denisov, O.Yu., additional, Ferrero, L., additional, Grasso, A., additional, Maggiora, A., additional, Panzarasa, A., additional, Panzieri, D., additional, Tosello, F., additional, Botta, E., additional, Bressani, T., additional, Calvo, D., additional, Costa, S., additional, D'Isep, D., additional, Feliciello, A., additional, Filippi, A., additional, Marcello, S., additional, Mirfakhrai, N., additional, Agnello, M., additional, Iazzi, F., additional, Minetti, B., additional, and Tessaro, S., additional

Published
2001
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8. Study of annihilation in two mesons in the momentum range between 50 to 400 MeV/c with OBELIX

Author

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

Published
1997
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11. On Rescattering Effects in the Reaction π–d → π–d.

Author

Baru, V.V., Kudryavtsev, A.E., and Tarasov, V.E.

Subjects
*PARTICLES (Nuclear physics), *ENERGY levels (Quantum mechanics), *SCATTERING (Physics), *PAULI exclusion principle, *QUANTUM theory
Abstract

Rescattering corrections to the impulse approximation for the processes γd → π0d and π-d → π-d are discussed. It is shown that the rescattering effects give a nonnegligible contribution to the real part of these amplitudes. At the same time, the contributions from the imaginary parts of impulse and rescattering corrections drastically cancel each other. This cancellation means that the processes π-d → π0nn and γd → π+nn/π-pp, when the nucleon pair is in the spin triplet state, are strongly suppressed near threshold as required by the Pauli principle. [ABSTRACT FROM AUTHOR]

Published
2004
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12. Angular Asymmetries in the Reactions pvector p → dπ[sup +]η and pvector n → dπ[sup 0]η and a[sub 0]–f[sub 0] Mixing.

Author

Kudryavtsev, A.E., Tarasov, V.E., Haidenbauer, J., Hanhart, C., and Speth, J.

Subjects
*ANGULAR distribution (Nuclear physics), *RESONANCE, *POLARIZATION (Nuclear physics), *PROTON beams
Abstract

The reactions pp → dπ[sup +]η and pn → dπ[sup 0]η are of special interest for investigating the a[sub 0](980)(J[sup P] = 0[sup +]) resonance in the process NN → da[sub 0] → dπη. We study some aspects of those reactions within a general formalism and also in a concrete phenomenological model. In particular, it is shown that the presence of nonresonant (i.e., without excitation of the a[sub 0] resonance) contributions to these reactions yields nonvanishing values for specific polarization observables, i.e., to effects like those generated by a[sub 0][sup 0]–f[sub 0] mixing. An experimental determination of these observables for the reaction pvector p → dπ[sup +]η would provide concrete information on the magnitude of those nonresonant contributions to πη production. We also discuss the possibility of extracting information about a[sub 0][sup 0]–f[sub 0] mixing from the reaction pvector n → dπ[sup 0]η with a polarized proton beam.© 2003 MAIK “Nauka / Interperiodica”. [ABSTRACT FROM AUTHOR]

Published
2003
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14. Solitons and their interactions in classical field theory

Author

Belova, Tamara.I. and Kudryavtsev, A.E.

Abstract

Effects of nonlinearity in the classical field theory for non-integrable systems are considered, such as soliton scattering, soliton bound states, the fractal nature of resonant structures, kink scattering by inhomogeneities, and bubble collapse. The results are presented in both (1 + 1) and higher dimensions. Both neutral and charged scalar fields are considered. Possible application areas for the nonlinearity effects are discussed.

Published
1997

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