Scientific Commons: Claude Amsler

Performance of Radiation Hard Pixel Sensors for the CMS Experiment (2009)

Position sensitive detectors in particle physics experiments are used for the detection of the particles trajectory produced in high energy collisions. To study physics phenomena at high energies the...

Evidence for $\pi K$ -atoms with DIRAC-II (2008)

Allkofer, Yves, Amsler, Claude

DIRAC-II is a fixed-target experiment at the CERN Proton Synchroton (PS) which has been designed to search for piK atoms, a bound state of a piÂ±KÂ± pair, and measure their lifetime. These atoms...

ATHENA : First Production of Cold Antihydrogen and Beyond (2004)

Kellerbauer, A G, Amoretii, M, Amsler, Claude, Bonomi, G, Bowe, P, Canali, C, ...

Atomic systems of antiparticles are the laboratories of choice for tests of CPT symmetry with antimatter. The ATHENA experiment was the first to report the production of copious amounts of cold...

Production of Cold Antihydrogen with ATHENA for Fundamental Studies (2004)

Kellerbauer, A G, Kellerbauer, A G, Amoretti, M, Amsler, Claude, Bonomi, G, Bowe, P, ...

Since the beginning of operations of the CERN Antiproton Decelerator in July 2000, the successful deceleration, storage and manipulation of antiprotons has led to remarkable progress in the...

The ATHENA Antihydrogen Apparatus (2004)

Amoretti, M, Amsler, Claude, Bonomi, G, Bouchta, A, Bowe, P, Carraro, C, ...

The ATHENA apparatus that recently produced and detected the first cold antihydrogen atoms is described. Its main features, which are described herein, are: an external positron accumulator, making...

Positron plasma diagnostics and temperature control for antihydrogen production (2003)

Amoretti, M, Amsler, Claude, Bonomi, G, Bouchta, A, Bowe, P, Carraro, C, ...

Production of antihydrogen atoms by mixing antiprotons with a cold, confined, positron plasma depends critically on parameters such as the plasma density and temperature. We discuss non-destructive...

First Production and Detection of Cold Antihydrogen Atoms (2003)

Fujiwara, M C, Amoretti, M, Amsler, Claude, Bonomi, G, Bouchta, A, Bowe, P, ...

The ATHENA experiment recently produced the first atoms of cold antihydrogen. This paper gives a brief review of how this was achieved.

Limits on the neutrino magnetic moment from the MUNU experiment (2003)

Daraktchieva, Z, Lamblin, J, Link, O, Amsler, Claude, Avenier, M, Broggini, C, ...

The MUNU experiment was carried out at the Bugey nuclear power reactor. The aim was the study of electron antineutrino-electron elastic scattering at low energy. The recoil electrons were recorded in...

Production and detection of cold antihydrogen atoms (2002)

Amoretti, M, Amsler, Claude, Bonomi, G, Bouchta, A, Bowe, P, Carraro, C, ...

A theoretical underpinning of the standard model of fundamental particles and interactions is CPT invariance, which requires that the laws of physics be invariant under the combined discrete...

Further evidence for a large glue component in the f0(1500) meson (2002)

Amsler, Claude

We argue that the experimental decay rates of the f0(1500) meson into two pseudoscalar mesons and into two photons are incompatible with a quark-antiquark state and that the f0(1710) meson is...

Producing Slow Antihydrogen for a Test of CPT Symmetry with ATHENA (2002)

Fujiwara, M C, Amoretti, M, Amsler, Claude, Bendiscioli, G, Bonomi, G, Bouchta, A, ...

The ATHENA experiment at the Antiproton Decelerator facility at CERN aims at testing CPT symmetry with antihydrogen. An overview of the experiment, together with preliminary results of development...

Proton-Antiproton annihilation at rest into $K_{L}K_{L}\pi^{0}$ (2000)

Von Dombrowski, S, Amsler, Claude

Search for the E/$\tau$ decay to $\eta\pi\pi$ in proton antiproton annihilation at rest (2000)

Urner, D, Amsler, Claude

Proton-Antiproton Annihilation and Meson Spectroscopy with the Crystal Barrel (1997)

Amsler, Claude

This report reviews the achievements of the Crystal Barrel experiment at the Low Energy Antiproton Ring (LEAR) at CERN. During seven years of operation Crystal Barrel has collected very large...

Is $f_0(1500)$ a Scalar Glueball? (1995)

Amsler, Claude, Close, Frank

Following the discovery of two new scalar mesons, $f_0(1370)$ and $f_0(1500)$ at the Low Energy Antiproton Ring at CERN, we argue that the observed properties of this pair are incompatible with them...

Search for a new light gauge boson in decays of $\pi^{0}$ and $\eta$ (1994)

Amsler, Claude, Armstrong, D S, Augustin, I, Baker, C A, Barnett, B M, Batty, C J, ...

Protonium annihilation into K$_{L}^{0}$K$_{S}^{0}\pi^{0}$ and K$_{L}^{0}$K$_{S}^{0}\eta$ (1993)

Amsler, Claude, Armstrong, D S, Augustin, I, Baker, C A, Barnett, B M, Batty, C J, ...

Radiative protonium annihilation into $\gamma\gamma$, $\gamma\pi^{0}$, $\gamma\eta$, $\gamma\omega$, and $\gamma\eta$' (1993)

Amsler, Claude, Armstrong, D S, Augustin, I, Baker, C A, Barnett, B M, Batty, C J, ...

Antiproton-proton annihilation at rest into $\omega\pi^{0}\pi$.sup (0) (1993)

Amsler, Claude, Armstrong, D S, Augustin, I, Baker, C A, Barnett, B M, Batty, C J, ...

Antiproton-proton annihilation at rest into two-body final states (1993)

Amsler, Claude, Armstrong, D S, Augustin, I, Baker, C A, Barnett, B M, Batty, C J, ...

P- versus s-wave $\overline{p}$p-annihilation at rest in LH$_{2}$ (1992)

Amsler, Claude, Augustin, I, Baker, C A, Barnett, B M, Batty, C J, Beuchert, K, ...