317 citations · 1.1k across the 23 of their papers we have counts for
26 papers
First measurement of the antihydrogen production cross section through the charge-exchange reaction of low-energy antiprotons with orthopositronium
GBAR Collaboration, P. Adrich, I. Belosevic +42
The GBAR experiment has measured the formation rate of antihydrogen from antiproton impact on a positronium cloud for antiproton kinetic energies of 4 and 6 keV. This is the first…
Monitoring antiproton numbers with a CMOS detector in a dense-track environment
C. Regenfus, P. Adrich, I. Belosevic +42
The production of antihydrogen by the GBAR experiment at AD/ELENA requires good knowledge of the number of incident keV antiprotons, which can be problematic. We have used a commer…
A determination of the backscattering probability of low-energy antiprotons
GBAR Collaboration, K. Park, E. Perez +42
It is commonly assumed that antiprotons impinging on a material surface annihilate promptly with the nuclei of the material. However, at kinetic energies of a few keV, this assumpt…
Record accumulation of antiprotons in a Penning-Malmberg Trap and their preparation for improved production of antihydrogen beams
B. Lee, B. Kim, P. Adrich +35
CERN's AD/ELENA ``antimatter factory'' - unique worldwide - serves several experiments, all of which use electromagnetic traps to accumulate antiprotons for fundamental science. Th…
Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud
P. Adrich, P. Blumer, G. Caratsch +61
We report on the first production of an antihydrogen beam by charge exchange of 6.1 keV antiprotons with a cloud of positronium in the GBAR experiment at CERN. The antiproton beam…
Positron accumulation in the GBAR experiment
P. Blumer, M. Charlton, M. Chung +67
We present a description of the GBAR positron (e+) trapping apparatus, which consists of a three stage Buffer Gas Trap (BGT) followed by a High Field Penning Trap (HFT), and discus…
Positron production using a 9 MeV electron linac for the GBAR experiment
M. Charlton, J. J. Choi, M. Chung +67
For the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment at CERN's Antiproton Decelerator (AD) facility we have constructed a source of slow positrons, which uses…
Prospects for studies of the free fall and gravitational quantum states of antimatter
Gabriel Dufour, David B. Cassidy, Paolo Crivelli +6
Different experiments are ongoing to measure the effect of gravity on cold neutral antimatter atoms such as positronium, muonium and antihydrogen. Among those, the project GBAR in…
A spectroscopy approach to measure the gravitational mass of antihydrogen
A. Yu. Voronin, V. V. Nesvizhevsky, G. Dufour +6
We study a method to induce resonant transitions between antihydrogen () quantum states above a material surface in the gravitational field of the Earth. The method consis…
Shaping the distribution of vertical velocities of antihydrogen in GBAR
Gabriel Dufour, Pascal Debu, Astrid Lambrecht +3
GBAR is a project aiming at measuring the free fall acceleration of gravity for antimatter, namely antihydrogen atoms (). Precision of this timing experiment…
Measurement of the branching ratio of the decay
J. R. Batley, G. E. Kalmus, C. Lazzeroni +110
From the 2002 data taking with a neutral kaon beam extracted from the CERN-SPS, the NA48/1 experiment observed 97 candidates with a backgroun…
New Precise Measurements of the $\xilamgam$ and $\xisiggam$ Decay Asymmetries
J. R. Batley
The decay asymmetries of the weak radiative Hyperon decays Xi0 \to Lambda gamma and Xi0 \to Sigma0 gamma have been measured with high precision using data of the NA48/1 experiment…
First observation and branching fraction and decay parameter measurements of the weak radiative decay Xi0 --> Lambda e+e-
NA48 Collaboration
The weak radiative decay Xi0 --> Lambda e+e- has been detected for the first time. We find 412 candidates in the signal region, with an estimated background of 15 +/- 5 events. We…
Measurement of K^{0}_{\mu3} form factors
The NA48 Collaboration
This paper reports on a new high precision measurement of the form factors of the K_{L}\to π^{\pm} μ^{\mp} ν_μ decay. The data sample of about 2.3 events was recorde…
Measurement of the Ratio Gamma(KL -> pi+ pi-)/Gamma(KL -> pi e nu) and Extraction of the CP Violation Parameter |eta+-|
NA48 Collaboration
We present a measurement of the ratio of the decay rates Gamma(KL -> pi+ pi-)/Gamma(KL -> pi e nu), denoted as Gamma(K2pi)/Gamma(Ke3). The analysis is based on data taken during a…
Measurement of K^0_e3 form factors
NA48 collaboration
The semileptonic decay of the neutral K meson, KL -> pi e nu (Ke3), was used to study the strangeness-changing weak interaction of hadrons. A sample of 5.6 million reconstructed ev…
Measurement of the branching ratio of the decay KL -> pi e nu and extraction of the CKM parameter |Vus|
NA48 collaboration
We present a new measurement of the branching ratio R of the decay KL -> pi e nu (Ke3), relative to all charged KL decays with two tracks, based on data taken with the NA48 detecto…
Search for CP violation in K0 -> 3 pi0 decays
NA48 Collaboration
Using data taken during the year 2000 with the NA48 detector at the CERN SPS, a search for the CP violating decay K_S -> 3 pi0 has been performed. From a fit to the lifetime distri…
First observation of the KS->pi0 gamma gamma decay
NA48 Collaboration
Using the NA48 detector at the CERN SPS, 31 KS->pi0 gamma gamma candidates with an estimated background of 13.7 +- 3.2 events have been observed. This first observation leads to a…
A precision measurement of direct CP violation in the decay of neutral kaons into two pions
J. R. Batley, NA48 collaboration
The direct CP violation parameter Re(epsilon'/epsilon) has been measured from the decay rates of neutral kaons into two pions using the NA48 detector at the CERN SPS. The 2001 runn…
Precise measurement of the decay
A. Lai
The decay rate of $\klpgg$ has been measured with the NA48 detector at the CERN SPS. A total of 2558 $\klpgg$ candidates have been observed with a residual background of 3.2%. The…
New measurements of the and masses
A. Lai, NA48 collaboration
New measurements of the and masses have been performed using decays to 3 with the NA48 detector at the CERN SPS. Using symmetric decays to reduce systematic effects,…
A precise measurement of the direct CP violation parameter Re(epsilon'/epsilon)
NA48 Collaboration
The direct CP violation parameter Re(epsilon'/epsilon) has been measured from the decay rates of neutral kaons into two pions using the NA48 detector at the CERN SPS. With 3.3 mill…
Measurement of the K_L -> e+ e- e+ e- Decay Rate
A. Lai
The decay rate of the neutral long-lived K meson into the e+ e- e+ e- final state has been measured with the NA48 detector at the CERN SPS. Using data collected in 1999, a total of…