J. Nieves

Instituto de Física Corpuscular

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E. Oset

Universitat de València

177

M. J. Vicente Vacas

Instituto de Física Corpuscular

124

E. Hernández

Universidad de Salamanca

100

C. García-Recio

Iberdrola (Spain)

Laura Tolós

Goethe University Frankfurt

M. Albaladejo

Universitat de València

C. Albertus

Universidad de Salamanca

L. L. Salcedo

Hospital Universitario Araba

M. Valverde

Universidad de Granada

Feng-Kun Guo

Institute of Theoretical Physics

Cooperative Institutions

European Organization for Nuclear Research

136

Universitat de València

101

Centre National de la Recherche Scientifique

Fermi National Accelerator Laboratory

Instituto de Física Corpuscular

A. Alikhanyan National Laboratory

The University of Tokyo

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati

Institut National de Physique Nucléaire et de Physique des Particules

University of Chinese Academy of Sciences

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Recent results from WASA-at-COSY

AIP conference proceedings (2010)

V. Hejny J. Nieves E. Oset M. J. Vicente Vacas

WASA—a 4π spectrometer for detection of charged and neutral particles—started operation at the cooler synchrotron COSY-Jülich in 2007. A number of experiments on meson production and decays have been carried out since then. The status of the analysis and preliminary results of some selected topics from the physics program are discussed.

10.1063/1.3541979

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NP effects in Λ_b → Λ_c^(*) semileptonic decays

EPJ Web of Conferences (2023)

Neus Penalva E. Hernández J. Nieves

In the context of lepton flavor universality violation (LFUV) studies, we study different observables related to the b → cτν¯ τ semileptonic decays. These observables are expected to help in distinguishing between different New Physics (NP) scenarios. Since the τ lepton is very short-lived, we consider three subsequent τ-decay modes, two hadronic πν τ and ρν τ and one leptonic µν¯ µ ν τ . This approach enables the differential decay width to be written in terms of visible (experimentally accessible) variables of the massive particle created in the τ decay. We present numerical results for the observables that can be accessed through the visible kinematics for the Λ b → Λ c and the Λ b → Λ˚ c p2595q transitions. This work is based on Refs.[1–3].

Semileptonic decay

B meson

10.1051/epjconf/202329006004

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Chiral Symmetry and Neutrino Pion Production off the Nucleon

AIP conference proceedings (2008)

E. Hernández J. Nieves M. Valverde Osamu Yasuda N. K. Mondal

The neutrino pion production off the nucleon is traditionally described in the literature by means of the weak excitation of the Δ(1232) resonance and its subsequent decay into Nπ. Here, we present results from a model that includes also some background terms required by chiral symmetry. We show that the contribution of these terms is sizeable and leads to significant effects in total and partially integrated pion production cross sections at intermediate energies of interest for neutrino oscillation experiments. Finally, we discuss parity‐violating contributions to the pion angular differential cross section induced by the interference of these non‐resonant terms with the Δ piece.

Parity (physics)

10.1063/1.2898945

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Quasi-elastic scattering, RPA, 2p2h and neutrino--energy reconstruction

J. Nieves R. Gran F. Sánchez M. J. Vicente Vacas

Institut de Fisica d’Altes Energies (IFAE), Bellaterra, Barcelona, SpainE-mail: jmnieves@ific.uv.esAbstract. We discuss some nuclear e ects, RPA correlations and 2p2h (multinucleon)mechanisms, on charged-current neutrino-nucleus reactions that do not produce a pion in the nal state. We study a wide range of neutrino energies, from few hundreds of MeV up to 10GeV. We also examine the inuence of 2p2h mechanisms on the neutrino energy reconstruction.

Charged current

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Quasi-elastic scattering, RPA, 2p2h and neutrino--energy reconstruction

arXiv (Cornell University) (2013)

J. Nieves R. Gran F. Sánchez M. J. Vicente Vacas

We discuss some nuclear effects, RPA correlations and 2p2h (multinucleon) mechanisms, on charged-current neutrino-nucleus reactions that do not produce a pion in the final state. We study a wide range of neutrino energies, from few hundreds of MeV up to 10 GeV. We also examine the influence of 2p2h mechanisms on the neutrino energy reconstruction.

Charged current

10.48550/arxiv.1310.7091

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Citations (1)

Neutrino-nucleus CCQE-like scattering

Nuclear and Particle Physics Proceedings (2016)

J. Nieves R. Gran I. Ruiz Simó F. Sánchez M. J. Vicente Vacas

RPA correlations, spectral function and 2p2h (multi-nucleon) effects on charged-current neutrino-nucleus reactions without emitted pions are discussed. We pay attention to the influence of RPA and multi-nucleon mechanisms on the MiniBooNE and MINERvA flux folded differential cross sections, the MiniBooNE flux unfolded total cross section and the neutrino energy reconstruction.

MiniBooNE

Charged current

Neutral current

10.1016/j.nuclphysbps.2015.09.295

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Citations (10)

The S01 − Λ(1405) and − Λ(1670) resonances in meson-baryon unitarized coupled channel chiral perturbation theory

Nuclear Physics A (2003)

C. García-Recio J. Nieves E. Ruiz Arriola M. J. Vicente Vacas

Formalism (music)

10.1016/s0375-9474(03)01127-8

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Citations (2)

One-pion production in neutrino-nucleus collisions

AIP conference proceedings (2015)

E. Hernández J. Nieves J. M. Vicente-Vacas

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation E. Hernández, J. Nieves, J. M. Vicente-Vacas; One-pion production in neutrino-nucleus collisions. AIP Conf. Proc. 15 May 2015; 1663 (1): 070002. https://doi.org/10.1063/1.4919483 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioAIP Conference Proceedings Search Advanced Search |Citation Search

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10.1063/1.4919483

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Heavy quark spin symmetry partners of theX(3872)

Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology (2012)

J. Nieves Manuel Pavón Valderrama

We explore the consequences of heavy quark spin symmetry for the charmed meson-antimeson system in a contact-range (or pionless) effective field theory. As a trivial consequence, we theorize the existence of a heavy quark spin symmetry partner of the $X(3872)$, with ${J}^{\mathrm{PC}}={2}^{++}$, which we call $X(4012)$ in reference to its predicted mass. If we additionally assume that the $X(3915)$ is a ${0}^{++}$ heavy spin symmetry partner of the $X(3872)$, we end up predicting a total of six ${D}^{(*)}{\overline{D}}^{(*)}$ molecular states. We also discuss the error induced by higher order effects such as finite heavy quark mass corrections, pion exchanges and coupled channels, allowing us to estimate the expected theoretical uncertainties in the position of these new states.

X(3872)

Bar (unit)

10.1103/physrevd.86.056004

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Citations (193)

The Λb → J/ψK− p reaction: Λ(1405) and hidden charm pentaquark formation

AIP conference proceedings (2016)

E. Oset L. Roca Maxim Mai J. Nieves

In this talk we present an approach to the Λb → J/ψK− p reaction, where we look at the invariant mass of K− p and also πΣ, with a view to determine the shape and production rate of the Λ(1405) resonance. We compare the results obtained with the analysis of the same reaction, made a posteriori by the LHCb collaboration, in which two pentaquark states were claimed. At the same time we show the results of another work, prompted by the findings of the LHCb collaboration, where we show that there is consistency with the results obtained in the study of the Λb → J/ψK− p reaction with other results previously reported about a hidden charm baryon state.

Pentaquark

Charm (quantum number)

Invariant mass

10.1063/1.4949408

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Citations (1)