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Física Quàntica i Astrofísica: Recent submissions

Now showing items 21-40 of 2993

    Relativistic extended Thomas-Fermi calculations of finite nuclei with realistic nucleon-nucleon interactions 

    Centelles Aixalà, Mario; Viñas Gausí, Xavier; Barranco Gómez, Manuel; Ohtsuka, N.; Faessler, Amand; Dao, T. Khoa; Müther, Herbert (Publication date: 2010-04-22)

    A relativistic energy density functional is constructed to investigate the Dirac effects on different properties of the structure and scattering of finite nuclei. The kinetic energy density has been derived within a ...

    Study of the reaction e+e- → ψ (2S)π+π- via initial-state radiation at B a B ar 

    Garra Ticó, Jordi; Graugés Pous, Eugeni; BABAR Collaboration (Publication date: 2019-03-25)

    We study the process e + e − → ψ ( 2 S ) π + π − with initial-state-radiation events produced at the PEP-II asymmetric-energy collider. The data were recorded with the BABAR detector at center-of-mass energies at and near ...

    Magic constraints on Gamma-ray emission from Cygnus X-3 

    Paredes i Poy, Josep Maria; Ribó Gomis, Marc; Bosch i Ramon, Valentí (Publication date: 2020-02-14)

    Cygnus X-3 is a microquasar consisting of an accreting compact object orbiting around a Wolf-Rayet star. It has been detected at radio frequencies and up to high-energy gamma rays (above 100 MeV). However, many models also ...

    Measurement of the exclusive Υ production cross-section in pp collisions at √{s}=7 TeV and 8 TeV 

    Badalov, Alexey; Casanova Mohr, Raimon; Garrido Beltrán, Lluís; Gascón Fora, David; Graciani Díaz, Ricardo; Graugés Pous, Eugeni; Mann Benito, Carla; Picatoste Olloqui, Eduardo; Rives Molina, Vicente José; Ruiz, Hugo (Ruiz Pérez); LHCb collaboration (Publication date: 2022-05-19)

    A study is presented of central exclusive production of Υ(nS) states, where the Υ(nS) resonances decay to the µ +µ − final state, using pp collision data recorded by the LHCb experiment. The cross-section is measured in ...

    High order hydrodynamical equations 

    Sala Mirabet, Ferran; Torra Roca, Jorge; Cortes, P. (Publication date: 2009-08-21)

    Hydrodynamical equations act as a link between the local observed magnitudes of galactic motion and the general ones accounting for the behaviour of the Galaxy as a whole. Constraints are set usually in order to use them ...

    Gaia photometry for white dwarfs 

    Carrasco Martínez, José Manuel; Catalán, S.; Jordi i Nebot, Carme; Tremblay, P.-E.; Napiwotzki, R.; Luri Carrascoso, Xavier; Robin, A. C.; Kowalski, P. M. (Publication date: 2014-04-23)

    Context. White dwarfs can be used to study the structure and evolution of the Galaxy by analysing their luminosity function and initial mass function. Among them, the very cool white dwarfs provide the information for the ...

    Side-branch growth in two-dimensional dendrits. Part II: Phase-field model 

    Couder, Yves; González Cinca, Ricard; Hernández Machado, Aurora (Publication date: 2011-07-07)

    The development of side-branching in solidifying dendrites in a regime of large values of the Peclet number is studied by means of a phase-field model. We have compared our numerical results with experiments of the preceding ...

    Antireflection coatings from analogy between electron scattering and spin precession 

    Sprung, Donald W. L.; Morozov, Gregory V.; Martorell Domenech, Juan (Publication date: 2012-04-19)

    We use the analogy between scattering of a wave from a potential, and the precession of a spin-half particle in a magnetic field, to gain insight into the design of an antireflection coating for electrons in a semiconductor ...

    Collective spin excitations of alkali-metal clusters 

    Serra, Llorenç; Broglia, R. A., 1939-; Barranco Gómez, Manuel; Navarro Faus, Jesús (Publication date: 2009-10-06)

    The response function of alkali-metal clusters, modeled as jellium spheres, to dipole (L=1) and quadrupole (L=2) spin-dependent fields is obtained within the time-dependent local-spin-density approximation of density-functional ...

    Covert symmetries in the neutrino mass matrix 

    Björkeroth, Fredrik; Di Luzio, Luca; Mescia, Federico; Nardi, Enrico (Publication date: 2021-07-02)

    The flavour neutrino puzzle is often addressed by considering neutrino mass matrices m with a certain number of vanishing entries (mij = 0 for some values of the indices), since a reduction in the number of free parameters ...

    Origin of magnetic and magnetoelastic tweedlike precursor modulations in ferroic materials 

    Saxena, A. (Avadh); Castán i Vidal, Maria Teresa; Planes Vila, Antoni; Porta Tena, Marcel; Kishi, Y.; Lograsso, T. A.; Viehland, D.; Wuttig, Matthias; De Graef, Marc (Publication date: 2010-06-11)

    Based on experimental observations of modulated magnetic patterns in a Co0.5Ni0.205Ga0.295 alloy, we propose a model to describe a (purely) magnetic tweed and a magnetoelastic tweed. The former arises above the Curie (or ...

    Solar and atmospheric four-neutrino oscillations 

    González García, Ma. Concepción; Maltoni, Michele; Peña Garay, Carlos (Publication date: 2010-05-06)

    We present an analysis of the neutrino oscillation solutions of the solar and atmospheric neutrino problems in the framework of four-neutrino mixing where a sterile neutrino is added to the three standard ones and the mass ...

    Statistical hadronization of supercooled quark-gluon plasma 

    Keränen, A.; Csernai, L. P.; Magas, Volodymyr; Maninnen, J. (Publication date: 2010-04-22)

    The fast simultaneous hadronization and chemical freeze-out of supercooled quark-gluon plasma, created in relativistic heavy ion collisions, can lead to the reheating of the expanding matter and to the change in a collective ...

    Structure and energetics of mixed 4He-3He drops 

    Barranco Gómez, Manuel; Pi Pericay, Martí; Gatica, S.M.; Hernández, E. Susana; Navarro Faus, Jesús (Publication date: 2009-12-23)

    Using a finite-range density functional, we have investigated the energetics and structural features of mixed helium clusters. The possibility of doping the cluster with a molecule of sulfur hexafluoride is also considered. ...

    Cross sections for the reactions e+e− → K0SK0L, K0SK0Lπ+π−, K0SK0Sπ+π−, and K0SK0SK+K− from events with initial-state radiation 

    Graugés Pous, Eugeni; BABAR Collaboration (Publication date: 2019-04-02)

    We study the processes e + e − → K 0 S K 0 L γ , K 0 S K 0 L π + π − γ , K 0 S K 0 S π + π − γ , and K 0 S K 0 S K + K − γ , where the photon is radiated from the initial state, providing cross section measurements for the ...

    Contribution to the muon anomaly from superstring-inspired models 

    Grifols, Josep Antoni; Méndez, A.; Solà Peracaula, Joan (Publication date: 2010-06-09)

    We calculate the contribution to the muon anomaly induced by new Yukawa couplings involving heavy-matter E6 fields predicted in the framework of superstring theories. We analyze a few models found in the current literature ...

    Measurement of the effective Bs0→J/ψKS0 lifetime 

    LHCb Collaboration; Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Comerma Montells, Albert; Garrido Beltrán, Lluís; Graciani Díaz, Ricardo; Graugés Pous, Eugeni; López Asamar, Elias; Oyanguren Campos, Arantza de; Picatoste Olloqui, Eduardo; Potterat, Cédric; Rives Molina, Vicente José; Ruiz, Hugo (Ruiz Pérez); Ruiz Valls, Pablo; Vázquez Gómez, Ricard; Vilasis-Cardona, Xavier (Publication date: 2023-03-29)

    This paper reports the first measurement of the effective B0 s → J /ψK0 S lifetime and an updated mea- surement of its time-integrated branching fraction. Both measurements are performed with a data sample, corresponding ...

    Search for Strange-Pentaquark Production in e+e− Annihilation at √s=10.58 GeVc 

    Graugés Pous, Eugeni; BABAR Collaboration (Publication date: 2019-09-20)

    We search for strange-pentaquark states that have been previously reported by other experiments the Θ ( 1540 ) + , Ξ 5 ( 1860 ) −− , and Ξ 5 ( 1860 ) 0 in 123     fb − 1 of data recorded with the BABAR detector at the ...

    Constraints on axion-like particles with the Perseus Galaxy Cluster with MAGIC 

    Abe, H.; Abe, S.; Abhir, J.; Acciari, V.A.; Agudo, I.; Aniello, T.; Ansoldi, S.; Antonelli, L.A.; Arbet-Engels, Axel; Arcaro, C.; Artero, M.; Kushida, J.; Láinez Lezáun, M.; Lamastra, A.; Leone, F.; Lindfors, E.; Linhoff, L.; Lombardi, S.; Longo, F.; López-Coto, R.; López-Moya, M.; Asano, K.; López-Oramas, A.; Loporchio, S.; Lorini, A.; Machado de Oliveira Fraga, B.; Majumdar, P.; Makariev, M.; Maneva, G.; Mang, N.; Manganaro, M.; Mangano, S.; Baack, D.; Mannheim, K.; Mariotti, M.; Martínez, M.; Martínez-Chicharro, M.; Mas-Aguilar, A.; Mazin, D.; Menchiari, S.; Mender, S.; Miceli, D.; Miener, T.; Babić, A.; Miranda, J.M.; Mirzoyan, R.; Molero González, M.; Molina, Edgar; Mondal, H.A.; Moralejo, A.; Morcuende, D.; Nakamori, T.; Nanci, C.; Nava, L.; Baquero, A.; Neustroev, V.; Nickel, L.; Nievas Rosillo, M.; Nigro, C.; Nikolić, L.; Nilsson, K.; Nishijima, K.; Njoh Ekoume, T.; Noda, K.; Nozaki, S.; Barres de Almeida, U.; Ohtani, Y.; Okumura, A.; Otero-Santos, J.; Paiano, S.; Palatiello, M.; Paneque, D.; Paoletti, R.; Paredes i Poy, Josep Maria; Pavlović, D.; Persic, M.; Barrio, J.A.; Pihet, M.; Pirola, G.; Podobnik, F.; Prada Moroni, P.G.; Prandini, E.; Principe, G.; Priyadarshi, C.; Rhode, W.; Ribó Gomis, Marc; Rico, J.; Batković, I.; Righi, C.; Sahakyan, N.; Saito, T.; Satalecka, K.; Saturni, F.G.; Schleicher, B.; Schmidt, K.; Schmuckermaier, F.; Schubert, J.L.; Schweizer, T.; Baxter, J.; Sciaccaluga, A.; Sitarek, J.; Sliusar, V.; Sobczynska, D.; Spolon, A.; Stamerra, A.; Strišković, J.; Strom, D.; Strzys, M.; Suda, Y.; Becerra González, J.; Suutarinen, S.; Tajima, H.; Takahashi, M.; Takeishi, R.; Tavecchio, F.; Temnikov, P.; Terauchi, K.; Terzić, T.; Teshima, M.; Tosti, L.; Bednarek, W.; Truzzi, S.; Tutone, A.; Ubach, S.; van Scherpenberg, J.; Vazquez Acosta, M.; Ventura, S.; Verguilov, V.; Viale, I.; Vigorito, C.F.; Vitale, V.; Bernardini, E.; Vovk, I.; Walter, R.; Will, M.; Yamamoto, T.; Bernete, J.; Berti, A.; Besenrieder, J.; Bigongiari, C.; Biland, A.; Blanch, O.; Bonnoli, G.; Bošnjak, Ž.; Burelli, I.; Busetto, G.; Campoy-Ordaz, A.; Carosi, A.; Carosi, R.; Carretero-Castrillo, Mar; Castro-Tirado, A.J.; Ceribella, G.; Chai, Y.; Cifuentes, A.; Cikota, S.; Colombo, Elisabetta; Contreras, J.L.; Cortina, J.; Covino, S.; D'Amico, G.; D'Elia, V.; Da Vela, P.; Dazzi, F.; De Angelis, A.; De Lotto, B.; Del Popolo, A.; Delgado, J.; Delgado Mendez, C.; Depaoli, D.; Di Pierro, F.; Di Venere, L.; Dominis Prester, D.; Donini, A.; Dorner, D.; Doro, M.; Elsaesser, D.; Emery, G.; Escudero, J.; Fariña, L.; Fattorini, A.; Foffano, L.; Font, L.; Fukami, S.; Fukazawa, Yugo; García López, R.J.; Garczarczyk, M.; Gasparyan, S.; Gaug, M.; Giesbrecht Paiva, J.G.; Giglietto, N.; Giordano, F.; Gliwny, P.; Godinović, N.; Grau, R.; Green, D.; Green, J.G.; Hadasch, D.; Hahn, A.; Hassan, T.; Heckmann, L.; Herrera, J.; Hrupec, D.; Hütten, M.; Imazawa, R.; Inada, T.; Iotov, R.; Ishio, K.; Jiménez Martínez, I.; Jormanainen, J.; Kerszberg, D.; Kluge, G.W.; Kobayashi, Y.; Kouch, P.M.; Kubo, H. (Publication date: 2025-04-14)

    Axion-like particles (ALPs) are pseudo-Nambu-Goldstone bosons that emerge in various theories beyond the standard model. These particles can interact with high-energy photons in external magnetic fields, influencing the ...

    Weak charge and weak radius of 12C 

    Koshchii, Oleksandr; Erler, Jens; Gorchtein, Mikhail; Horowitz, Charles J.; Piekarewicz, Jorge; Roca Maza, Xavier; Seng, Chien-Yeah; Spiesberger, Hubert (Publication date: 2024-11-04)

    We present a feasibility study of a simultaneous subpercent extraction of the weak charge and the weak radius of the 12C nucleus using parity-violating electron scattering, based on a largely model-independent assessment ...