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NSR database version of April 27, 2024.

Search: Author = M.T.Pena

Found 36 matches.

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2016MA09      J.Phys.(London) G43, 023002 (2016)

L.E.Marcucci, F.Gross, M.T.Pena, M.Piarulli, R.Schiavilla, I.Sick, A.Stadler, J.W.Van Orden, M.Viviani

Electromagnetic structure of few-nucleon ground states

NUCLEAR REACTIONS 2,3H, 3,4He(E, E), E not given; analyzed available data; deduced experimental form factors of the hydrogen and helium isotopes, extracted from an up-to-date global analysis of σ and polarization observables measured in elastic electron scattering from these systems.

doi: 10.1088/0954-3899/43/2/023002
Citations: PlumX Metrics

2014BI17      Few-Body Systems 55, 705 (2014)

E.P.Biernat, F.Gross, M.T.Pena, A.Stadler

Quark Mass Functions and Pion Structure in Minkowski Space

doi: 10.1007/s00601-014-0863-x
Citations: PlumX Metrics

2014ST20      Few-Body Systems 55, 701 (2014)

A.Stadler, S.Leitao, M.T.Pena, E.P.Biernat

Singularity-Free Two-Body Equation with Confining Interactions in Momentum Space

doi: 10.1007/s00601-013-0746-6
Citations: PlumX Metrics

2008GA30      Eur.Phys.J. A 38, 209 (2008)

H.Garcilazo, M.T.Pena

np → ηd near threshold and the s-wave ηN amplitude

NUCLEAR REACTIONS 1H(n, dX), E(cm)=0-60 MeV; calculated η-meson production σ. Relativistic three-body model.

doi: 10.1140/epja/i2008-10662-x
Citations: PlumX Metrics

2008GR02      Phys.Rev. C 77, 015202 (2008)

F.Gross, G.Ramalho, M.T.Pena

Pure S-wave covariant model for the nucleon

doi: 10.1103/PhysRevC.77.015202
Citations: PlumX Metrics

2008GR06      Phys.Rev. C 77, 035203 (2008)

F.Gross, G.Ramalho, M.T.Pena

Fixed-axis polarization states: covariance and comparisons

doi: 10.1103/PhysRevC.77.035203
Citations: PlumX Metrics

2008RA16      Eur.Phys.J. A 36, 329 (2008)

G.Ramalho, M.T.Pena, F.Gross

A covariant model for the nucleon and the Δ

doi: 10.1140/epja/i2008-10599-0
Citations: PlumX Metrics

2006MA70      Phys.Rev. C 74, 042201 (2006)

V.Malafaia, M.T.Pena, Ch.Elster, J.Adam, Jr.

Charged- and neutral-pion production in the S-matrix approach

NUCLEAR REACTIONS 1H(p, pπ0), (p, pπ+), (n, pπ-), E=280-330 MeV; calculated pion production σ. S-matrix approach, comparison with data.

doi: 10.1103/PhysRevC.74.042201
Citations: PlumX Metrics

2006PE19      Acta Phys.Slovaca 56, 261 (2006)

M.T.Pena, H.Garcilazo

Study of the np → ηd reaction within a three-body model

NUCLEAR REACTIONS 1H(n, dX), E ≈ threshold; calculated η-meson production σ. Three-body model.

2006RA17      Few-Body Systems 39, 123 (2006)

G.Ramalho, A.Arriaga, M.T.Pena

Solution of the Spectator Equation for Relativistic NN Scattering Without Partial Wave Expansion

NUCLEAR REACTIONS 1H(n, n'), E=99-319 MeV; calculated scattering amplitudes, σ(θ). Solution to covariant spectator equation without partial wave expansion.

doi: 10.1007/s00601-006-0161-3
Citations: PlumX Metrics

2005GA27      Phys.Rev. C 72, 014003 (2005)

H.Garcilazo, M.T.Pena

Relativistic description of the np → ηd reaction near threshold

NUCLEAR REACTIONS 1H(n, dX), E(cm)=0-120 MeV; calculated η-meson production σ; deduced role of final state interaction, relativistic effects, related features. Comparisons with data.

doi: 10.1103/PhysRevC.72.014003
Citations: PlumX Metrics

2005MA20      Phys.Rev. C 71, 034002 (2005)

V.Malafaia, J.Adam, Jr., M.T.Pena

Pion rescattering operator in the S-matrix approach

doi: 10.1103/PhysRevC.71.034002
Citations: PlumX Metrics

2004AD11      Phys.Rev. C 69, 034008 (2004)

J.Adam, Jr., M.T.Pena, A.Stadler

Short-range three-nucleon forces and low-energy constants

NUCLEAR STRUCTURE 3H; calculated binding energies, three-nucleon force contributions, parameter dependences. Several models compared.

doi: 10.1103/PhysRevC.69.034008
Citations: PlumX Metrics

2004GR07      Phys.Rev. C 69, 034007 (2004)

F.Gross, A.Stadler, M.T.Pena

Electromagnetic interactions of three-body systems in the covariant spectator theory

doi: 10.1103/PhysRevC.69.034007
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2004MA13      Phys.Rev. C 69, 024001 (2004)

V.Malafaia, M.T.Pena

Pion rescattering in π0 production

NUCLEAR REACTIONS 1H(p, pπ0), E ≈ 290-440 MeV; calculated σ, pion rescattering effects, pion-nucleon amplitude. Non-relativistic reductions.

doi: 10.1103/PhysRevC.69.024001
Citations: PlumX Metrics

2002GA36      Phys.Rev. C66, 034606 (2002)

H.Garcilazo, M.T.Pena

The Reaction np → ηd Near Threshold

NUCLEAR REACTIONS 1H(n, X)2H, E(cm)=0-120 MeV; calculated η meson production σ; deduced reaction mechanism features. Comparison with data.

doi: 10.1103/PhysRevC.66.034606
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2002RA08      Phys.Rev. C65, 034008 (2002)

G.Ramalho, A.Arriaga, M.T.Pena

Relativistic Effects and Quasipotential Equations

doi: 10.1103/PhysRevC.65.034008
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2001DI20      Phys.Rev. C64, 044603 (2001)

J.Dias de Deus, M.T.Pena, J.C.Seixas

Multiplicity Distributions Associated to Subthreshold Events in Heavy-Ion Collisions

NUCLEAR REACTIONS 12C(12C, π0X), E ≈ 30-90 MeV/nucleon; analyzed σ. 27Al(36Ar, π0X), (36Ar, X), E not given; analyzed fragment multiplicities; deduced subthreshold meson production mechanism features.

doi: 10.1103/PhysRevC.64.044603
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2001GA06      Phys.Rev. C63, 021001 (2001)

H.Garcilazo, M.T.Pena

Nonexistence of a ηNN Quasibound State

NUCLEAR STRUCTURE 2H; calculated η meson elastic scattering σ, scattering lengths; deduced no quasibound state. Solution of Fadeev equations.

doi: 10.1103/PhysRevC.63.021001
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2001PE03      Nucl.Phys. A683, 322 (2001)

M.T.Pena, H.Garcilazo, D.O.Riska

The Reaction pp → ppη and the eta-Nucleon and Nucleon-Nucleon Interactions

NUCLEAR REACTIONS 1H(p, pX), E=1260-1340 MeV; calculated η meson production σ, meson exchange contributions; deduced coupling constant. Comparison with data.

doi: 10.1016/S0375-9474(00)00449-8
Citations: PlumX Metrics

2001RA26      Nucl.Phys. A689, 511c (2001)

G.Ramalho, A.Arriaga, M.T.Pena

Relativistic NN Scattering Equations without Partial-Wave Decomposition

NUCLEAR REACTIONS 1H(p, p), (n, n), E=300, 800 MeV; calculated scattering amplitudes.

doi: 10.1016/S0375-9474(01)00893-4
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2000GA28      Phys.Rev. C61, 064010 (2000)

H.Garcilazo, M.T.Pena

ηd Scattering in the Region of the S11 Resonance

doi: 10.1103/PhysRevC.61.064010
Citations: PlumX Metrics

2000GA29      Phys.Rev. C62, 011002 (2000)

H.Garcilazo, M.T.Pena

πd → ηNN Reaction Near Threshold

NUCLEAR REACTIONS 2H(π, nX), (π, pX), E at 630-746 MeV/c; calculated η production associated σ, σ(θ); deduced no quasibound state. Comparisons with data.

doi: 10.1103/PhysRevC.62.011002
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1999GA14      Phys.Rev. C59, 2389 (1999)

H.Garcilazo, M.T.Pena

Pion-Induced η Production in the Deuteron

NUCLEAR REACTIONS 2H(π-, 2nX), E=threshold-1500 MeV; calculated η production σ, σ(θ); deduced reaction mechanism features. Fully covariant formalism. Comparison with data.

doi: 10.1103/PhysRevC.59.2389
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1999PE16      Phys.Rev. C60, 045201 (1999)

M.T.Pena, D.O.Riska, A.Stadler

Nucleon Resonance Effects in pp → ppπ0 Near Threshold

NUCLEAR REACTIONS 1H(p, pπ0), E=280-320 MeV; calculated σ; deduced resonance contributions. Comparisons with data.

doi: 10.1103/PhysRevC.60.045201
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1999RA21      Phys.Rev. C60, 047001 (1999)

G.Ramalho, A.Arriaga, M.T.Pena

Two-Pion Exchange and Strong Form Factors in Covariant Field Theories

doi: 10.1103/PhysRevC.60.047001
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1998AD02      Nucl.Phys. A631, 570c (1998)

J.Adam, Jr., A.Stadler, M.T.Pena, F.Gross

Relativistic Dynamics in pp → ppπ0 Near Threshold

NUCLEAR REACTIONS 1H(p, pπ0), E=280-300 MeV; calculated σ. Relativistic calculations. Comparison with data.

doi: 10.1016/S0375-9474(98)00069-4
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1997AD14      Phys.Lett. 407B, 97 (1997)

J.Adam, Jr., A.Stadler, M.T.Pena, F.Gross

Effects of Relativistic Dynamics in pp → ppπ0 Near Threshold

NUCLEAR REACTIONS 1H(p, p'X), E=280-300 MeV; analyzed total σ vs E; deduced NN-interaction related features. Several models compared.

doi: 10.1016/S0370-2693(97)00732-6
Citations: PlumX Metrics

1996PE24      Phys.Rev. C54, 2235 (1996)

M.T.Pena, F.Gross, Y.Surya

Two-Pion-Exchange Potential and the πN Amplitude

doi: 10.1103/PhysRevC.54.2235
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1995CO27      Phys.Rev. C52, 2925 (1995)

S.A.Coon, M.T.Pena, D.O.Riska

Repulsive Short-Range Three-Nucleon Interaction

doi: 10.1103/PhysRevC.52.2925
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1994VA03      Phys.Rev. C49, 1799 (1994)

A.Valcarce, F.Fernandez, H.Garcilazo, M.T.Pena, P.U.Sauer

Effects of a Quark-Model-Based Nucleon-Δ Potential on the Two-Nucleon System Above Pion Threshold

NUCLEAR REACTIONS 1H(p, X), (p, π+), E=300-900 MeV; 2H(π+, π+), E ≤ 300 MeV; analyzed σ(E). 1H(p, π+), (polarized p, π+), E=578, 800 MeV; 2H(π+, π+), E=140, 256 MeV; analyzed σ(θ), polarization data. Nonrelativistic quark model, nucleon-Δ potential.

doi: 10.1103/PhysRevC.49.1799
Citations: PlumX Metrics

1993CO14      Phys.Rev. C48, 2559 (1993)

S.A.Coon, M.T.Pena

Momentum and Coordinate Space Three-Nucleon Potentials

NUCLEAR STRUCTURE 3H; calculated three-body force contributions to binding energy. Potentials with ρ, π exchange, momentum, coordinate space.

doi: 10.1103/PhysRevC.48.2559
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1992PE03      Phys.Rev. C45, 1487 (1992)

M.T.Pena, H.Garcilazo, U.Oelfke, P.U.Sauer

Effect of the NΔ Interaction on Observables of the πNN and γNN Systems

NUCLEAR REACTIONS 1H(polarized p, π), E=578, 800 MeV; calculated analyzing power, iT11, other polarization observables vs θ. 2H(γ, π0), E=300 MeV; calculated σ(θ), asymmetry, polarization observables vs θ; deduced NΔ-interaction role.

doi: 10.1103/PhysRevC.45.1487
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1990PE07      Phys.Rev. C42, 855 (1990)

M.T.Pena, H.Henning, P.U.Sauer

Effect of the Nucleon-Delta Interaction on Properties of the Three-Nucleon Ground State

NUCLEAR STRUCTURE 3He; calculated charge monopole, magnetic dipole form factors; deduced nucleon-Δ interaction role.

doi: 10.1103/PhysRevC.42.855
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1988FO07      Nucl.Phys. A487, 92 (1988)

A.C.Fonseca, M.T.Pena

Faddeev-Born-Oppenheimer Equations for Molecular Three-Body Systems: Adiabatic calculation of 9Be

NUCLEAR STRUCTURE 9Be; calculated levels. Molecular three-body system, Faddeev-Born-Oppenheimer equations.

doi: 10.1016/0375-9474(88)90131-5
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1984CO18      Phys.Rev. C30, 1366 (1984)

S.A.Coon, M.T.Pena, R.G.Ellis

Three-Nucleon Forces and the Triton Binding Energy

NUCLEAR STRUCTURE 3H; calculated binding energy. Faddeev equations, s-wave potentials, three-nucleon forces.

doi: 10.1103/PhysRevC.30.1366
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