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3 results on '"ANGULAR-CORRELATION"'

1. Symmetry violations in nuclear and neutron beta decay

Author

K. Keri Vos, Hans Wilschut, Robertus Timmermans, Precision Frontier, and High-Energy Frontier

Subjects
Semileptonic decay, Particle physics, Nuclear Theory, LORENTZ INVARIANCE, STANDARD MODEL, General Physics and Astronomy, Lorentz covariance, Weak interaction, Standard Model, High Energy Physics - Experiment, Nuclear physics, Double beta decay, Neutron, Symmetry breaking, Nuclear Experiment, POLARIZED NEUTRONS, Physics, COULOMB CORRECTIONS, TIME-REVERSAL VIOLATION, WEAK-INTERACTIONS, EFFECTIVE-FIELD THEORY, ROTATIONAL INVARIANCE, High Energy Physics - Phenomenology, High Energy Physics::Experiment, Neutrino, ELECTRIC-DIPOLE MOMENTS, ANGULAR-CORRELATION
Abstract

The role of $\beta$ decay as a low-energy probe of physics beyond the Standard Model is reviewed. Traditional searches for deviations from the Standard Model structure of the weak interaction in $\beta$ decay are discussed in the light of constraints from the LHC and the neutrino mass. Limits on the violation of time-reversal symmetry in $\beta$ decay are compared to the strong constraints from electric dipole moments. Novel searches for Lorentz symmetry breaking in the weak interaction in $\beta$ decay are also included, where we discuss the unique sensitivity of $\beta$ decay to test Lorentz invariance. We end with a roadmap for future $\beta$-decay experiments., Comment: Accepted for publication in Rev. Mod. Phys. 86 pages, 13 figures

Published
2015

2. Inter- and intrachannel exchange interference in photoinduced Auger decay: The Kr M-4,M-5-N1N23 and Xe N-4,N-5-O1O23 cases g

Author

Zitnik M., Bucar, Mihelic, Lablanquie, Penent, Paladoux, Andric, Bolognesi, and Avaldi

Subjects
ELECTRON-SPECTROSCOPY, COINCIDENCE, DOUBLE PHOTOIONIZATION, AUTOIONIZING STATES, ANGULAR-CORRELATION
Abstract

We study interference effects that appear in the cross section due to detection of two indistinguishable electrons in a photoelectron-Auger-electron pair (intrachannel exchange interference), or due to detection of two indistinguishable photoelectron-Auger electron pairs that share the final state but are emitted via two different intermediate states (interchannel exchange interference). For photoinduced Kr M-4,M-5-N1N23 (Xe N-4,N-5-O1O23) Auger decay, the intrachannel exchange interference is "switched on" at 131.3 eV (87.0 eV) and 133.8 eV (91.0 eV) photon impact energy for the M-5 (N-5) and M-4 (N-4) holes, respectively. The interchannel exchange interference is expected to appear at 132.6 eV (89.0 eV) when the photoelectron ejected from the M-4 (N-4) subshell is emitted with the same energy as the Auger electron emitted in the decay of the M-5 (N-5) hole, and vice versa, the energy of the photoelectron ejected from the M-5 (N-5) subshell equals the energy of the Auger electron emitted in the decay of the M-4 (N-5) hole. We use the approach of Vegh and Macek [Phys. Rev. A 50, 4031 (1994)], and Vegh [Phys. Rev. A 50, 4036 (1994)] to model these phenomena in a unified manner and examine their effects in an angle-resolved and angle-integrated coincidence spectra considering also the postcollision interaction (PCI). The previous and the present angle-resolved experimental results, together with the data obtained by a magnetic bottle time-of-flight spectrometer, indicate that in this particular case the exchange interference effects in the angle-integrated cross sections are considerably weaker than in the angle-resolved (gamma,2e) cross sections.

Published
2013

3. The spatial clustering of X-ray selected AGN in the XMM-COSMOS field

Author

E. Zucca, Andrea Comastri, C. Knobel, O. Le Fèvre, S. de la Torre, N. Z. Scoville, Francesca Civano, Fabrizio Fiore, Alexie Leauthaud, J. F. Le Borgne, Roberto Gilli, Chris Impey, L. de Ravel, M. Mignoli, Alessandro Cimatti, F. Lamareille, M. Bolzonella, Roberto Scaramella, Takamitsu Miyaji, G. Zamorani, Günther Hasinger, J. Walcher, Lidia Tasca, M. Fumana, Jean-Paul Kneib, P. Memeo, V. Le Brun, D. Maccagni, Angela Bongiorno, K. Kovac, S. Bardelli, Christian Maier, M. Scodeggio, Daniela Vergani, Nico Cappelluti, P. Franzetti, Christian Marinoni, H. J. McCracken, D. Bottini, A. Iovino, P. Kampczyk, E. Perez Montero, Olga Cucciati, Laurence Tresse, R. Pello, Jonathan R. Trump, Y. Peng, Luigi Guzzo, E. Ricciardelli, Emanuele Daddi, Cristiano Porciani, Cristian Vignali, Thierry Contini, Mara Salvato, Masayuki Tanaka, Alexis Finoguenov, Graziano Coppa, Paolo Cassata, Lucia Pozzetti, John D. Silverman, Vincenzo Mainieri, Peter Capak, C. M. Carollo, Marcella Brusa, Bianca Garilli, B. Meneux, Simon J. Lilly, Karina Caputi, Alvio Renzini, Pascal Oesch, A. Cappi, U. Abbas, Yoshiaki Taniguchi, Astronomy, California Institute of Technology (CALTECH), Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique - UMR 6207 (CPT), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), R. Gilli, G. Zamorani, T. Miyaji, J. Silverman, M. Brusa, V. Mainieri, N. Cappelluti, E. Daddi, C. Porciani, L. Pozzetti, F. Civano, A. Comastri, A. Finoguenov, F. Fiore, M. Salvato, C. Vignali, G. Hasinger, S. Lilly, C. Impey, J. Trump, P. Capak, H. McCracken, N. Scoville, Y. Taniguchi, C.M. Carollo, T. Contini, J.-P. Kneib, O. LeFevre, A. Renzini, M. Scodeggio, S. Bardelli, M. Bolzonella, A. Bongiorno, K. Caputi, A. Cimatti, G. Coppa, O. Cucciati, S. de la Torre, L. de Ravel, P. Franzetti, B. Garilli, A. Iovino, P. Kampczyk, C. Knobel, K. Kovac, F. Lamareille, J.-F. Le Borgne, V. Le Brun, C. Maier, M. Mignoli, R. Pello', Y. Peng, E. Perez Montero, E. Ricciardelli, M. Tanaka, L. Tasca, L. Tresse, D. Vergani, E. Zucca, U. Abba, D. Bottini, A. Cappi, P. Cassata, M. Fumana, L. Guzzo, A. Leauthaud, D. Maccagni, C. Marinoni, P. Memeo, B. Meneux, P. Oesch, R. Scaramella, and J. Walcher

Subjects
QSOS, ACTIVE GALACTIC NUCLEI, Stellar mass, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, galaxies: active, 2-POINT CORRELATION-FUNCTION, Large-scale structure of universe, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Power law, Luminosity, SUPERMASSIVE BLACK-HOLES, GALAXY REDSHIFT SURVEY, 0103 physical sciences, STAR-FORMING GALAXIES, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, media_common, Physics, EVOLUTION SURVEY COSMOS, galaxies: active – cosmology: large-scale structure of Universe – cosmology: observations – X-rays: galaxies, 010308 nuclear & particles physics, Cosmology, Cosmology: observations, Galaxies: active, X-rays: galaxies, Astronomy and Astrophysics, Space and Planetary Science, POINT-SOURCE CATALOGS, cosmology: large-scale structure of Universe, Universe, Galaxy, Redshift, Correlation function (statistical mechanics), LUMINOSITY FUNCTION, cosmology: observations, DIGITAL SKY SURVEY, [SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA], ANGULAR-CORRELATION
Abstract

We study the spatial clustering of 538 X-ray selected AGN in the 2 deg^2 XMM-COSMOS field that are spectroscopically identified to I_{AB} 3 x 10^{10} M_sun) at the same redshift. This suggests that AGN at z~1 are preferentially hosted by massive galaxies, as observed both in the local and in the distant (z~2) Universe. (shortened), Comment: 16 pages, 11 figures; accepted for publication in A&A. Language edited version

Published
2009

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