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arXiv · 1708.03172

First FAMU observation of muon transfer from mu-p atoms to higher-Z elements

FAMU Collaboration·Emiliano Mocchiutti·Valter Bonvicini·Rita Carbone·Miltcho Danailov·Elena Furlanetto·Komlan Segbeya Gadedjisso-Tossou·Daniele Guffanti·Cecilia Pizzolotto·Alexandre Rachevski·Lyubomir Stoychev·Erik Silvio Vallazza·Gianluigi Zampa·Joseph Niemela·Katsuhiko Ishida·Andrzej Adamczak·Giovanni Baccolo·Roberto Benocci·Roberto Bertoni·Maurizio Bonesini·Francesco Chignoli·Massimiliano Clemenza·Alessandro Curioni·Valter Maggi·Roberto Mazza·Massimiliano Moretti·Massimiliano Nastasi·Ezio Previtali·Dimitar Bakalov·Petar Danev·Michail Stoilov·Giuseppe Baldazzi·Riccardo Campana·Ignazio D'Antone·Michele Furini·Fabio Fuschino·Claudio Labanti·Anselmo Margotti·Stefano Meneghini·Gianluca Morgante·Luigi Pio Rignanese·Pier Luca Rossi·Mirco Zuffa·Tommaso Cervi·Antonio de Bari·Alessandro Menegolli·Carlo De Vecchi·Roberto Nardo`·Massimo Rossella·Alessandra Tomaselli·Lorenzo Colace·Mario De Vincenzi·Alfredo Iaciofano·Fabrizia Somma·Ludovico Tortora·Roberta Ramponi·Andrea Vacchi
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Abstract

The FAMU experiment aims to accurately measure the hyperfine splitting of the ground state of the muonic hydrogen atom. A measurement of the transfer rate of muons from hydrogen to heavier gases is necessary for this purpose. In June 2014, within a preliminary experiment, a pressurized gas-target was exposed to the pulsed low-energy muon beam at the RIKEN RAL muon facility (Rutherford Appleton Laboratory, UK). The main goal of the test was the characterization of both the noise induced by the pulsed beam and the X-ray detectors. The apparatus, to some extent rudimental, has served admirably to this task. Technical results have been published that prove the validity of the choices made and pave the way for the next steps. This paper presents the results of physical relevance of measurements of the muon transfer rate to carbon dioxide, oxygen, and argon from non-thermalized excited mu-p atoms. The analysis methodology and the approach to the systematics errors are useful for the subsequent study of the transfer rate as function of the kinetic energy of the mu-p currently under way.

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FAMU Collaboration, Emiliano Mocchiutti, Valter Bonvicini, Rita Carbone, Miltcho Danailov, Elena Furlanetto, Komlan Segbeya Gadedjisso-Tossou, Daniele Guffanti, Cecilia Pizzolotto, Alexandre Rachevski, Lyubomir Stoychev, Erik Silvio Vallazza, Gianluigi Zampa, Joseph Niemela, Katsuhiko Ishida, Andrzej Adamczak, Giovanni Baccolo, Roberto Benocci, Roberto Bertoni, Maurizio Bonesini, Francesco Chignoli, Massimiliano Clemenza, Alessandro Curioni, Valter Maggi, Roberto Mazza, Massimiliano Moretti, Massimiliano Nastasi, Ezio Previtali, Dimitar Bakalov, Petar Danev, Michail Stoilov, Giuseppe Baldazzi, Riccardo Campana, Ignazio D'Antone, Michele Furini, Fabio Fuschino, Claudio Labanti, Anselmo Margotti, Stefano Meneghini, Gianluca Morgante, Luigi Pio Rignanese, Pier Luca Rossi, Mirco Zuffa, Tommaso Cervi, Antonio de Bari, Alessandro Menegolli, Carlo De Vecchi, Roberto Nardo`, Massimo Rossella, Alessandra Tomaselli, Lorenzo Colace, Mario De Vincenzi, Alfredo Iaciofano, Fabrizia Somma, Ludovico Tortora, Roberta Ramponi, Andrea Vacchi. 2017-12-15. First FAMU observation of muon transfer from mu-p atoms to higher-Z elements. https://arxiv.org/abs/1708.03172

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