Ryugo Hayano
(University of Tokyo)
12/05/2009, 16:15
Antiproton Decelerator (AD)
The presently approved physics programme of ASACUSA (Atomic Spectroscopy and Collisions using Slow Antiprotons) includes 1) precision laser and microwave spectroscopy of antiprotonic helium atoms (tests of CPT invariance), 2) atomic and nuclear cross section measurements at very low energies using the RFQD (~100 keV) and the MUSASHI ultra low energy (~100 eV) beamline, and 3) a measurement of...
Jeffrey Scott Hangst
(Institute of Physics and Astronomy - University of Aarhus)
12/05/2009, 16:30
Antiproton Decelerator (AD)
We will discuss the future prospects for antihydrogen physics in the ALPHA experiment at the Antiproton Decelerator (AD). The primary goal of this experiment is to spectroscopically compare hydrogen and antihydrogen as a test of CPT invariance. We will identify the physics and technical challenges that must be addressed in order to achieve this goal, and we will suggest a progression of...
Gerald Gabrielse
(Harvard University)
12/05/2009, 16:45
Antiproton Decelerator (AD)
CERN not only leads the world in "high energy" physics. It has long also distinguished itself by pursuing fundamental particle physics at lower energy scales when the laboratory possesses the unique capability to do so. CERN introduced the world's lowest energy antiprotons at 5 MeV. Experimenters at LEAR and then the AD introduced particle traps to lower the energy by up to an additional...
Daniel Comparat
(Lab. Aimé Cotton, Orsay)
12/05/2009, 17:00
Antiproton Decelerator (AD)
The experimental program of AD-6 has been described as part of the documents submitted to the SPSC [1]. In those documents, this program extends at least to 2013, which should allow us to achieve the main physics goal of the experiment - a measurement to 1% of the gravitational interaction of antimatter. Our program however is broader and longer-term than that. The attached timeline of the...
Patrice PEREZ
(IRFU, CEA-Saclay, France)
12/05/2009, 17:10
Antiproton Decelerator (AD)
In our Letter of Intent of 2007 [1], we expressed our interest to use the CERN antiproton beam for a measurement of the acceleration of antihydrogen atoms in the gravity field of the Earth. The first step is to produce the Hbar+ ion, which can be manipulated and cooled down to µK temperatures (i.e. m/s velocities) according to Walz and Hänsch [2]. The excess positron can then be laser detached...
Frank Rathmann
(Forschungszentrum Juelich),
Paolo Lenisa
(Universita di Ferrara and INFN)
12/05/2009, 17:20
Antiproton Decelerator (AD)
We propose to use an internal polarized hydrogen storage cell gas target in the AD–ring to determine for the first time the two total spin–dependent pbarp cross sections σ1 and σ2 at antiproton beam energies in the range from 50 to 450 MeV [1]; a Technical Proposal will be submitted at the beginning of April to the SPS committee at CERN. The data obtained are of interest in itself for the...
Eberhard Widmann
(Stefan Meyer Institute for Subatomic Physics)
12/05/2009, 17:30
Antiproton Decelerator (AD)
One of the outstanding fundamental problems in hadron physics today is the question of the origin of the large hadron masses made up of light quarks. A possible way to gain information is to study how the meson mass changes in a nuclear medium. The mass shift of a meson in a nuclear medium will provide evidence of the partial restoration of spontaneous broken chiral symmetry.
The use of...
