932 citations · 9.8k across the 136 of their papers we have counts for
8 papers · 1 filter
Kaonic 3He and 4He X-ray measurements in SIDDHARTA
T. Ishiwatari, M. Bazzi, G. Beer +38
The strong-interaction shift of kaonic 3He and 4He 2p states was measured using gaseous targets for the first time in the SIDDHARTA experiment. The determined shift of kaonic 4He i…
Ground and excited charmonium state production in p+p collisions at sqrt(s)=200 GeV
A. Adare, S. Afanasiev, C. Aidala +444
We report on charmonium measurements [J/psi(1S), psi'(2S), and chi_c(1P)] in p+p collisions at sqrt(s)=200 GeV. We find that the fraction of J/psi coming from the feed-down decay o…
A New Measurement of Kaonic Hydrogen X rays
M. Bazzi, G. Beer, L. Bombelli +34
The system at threshold is a sensitive testing ground for low energy QCD, especially for the explicit chiral symmetry breaking. Therefore, we have measured the -serie…
Towards Antihydrogen Trapping and Spectroscopy at ALPHA
Eoin Butler, Gorm. B. Andresen, Mohammad. D. Ashkezari +37
Spectroscopy of antihydrogen has the potential to yield high-precision tests of the CPT theorem and shed light on the matter-antimatter imbalance in the Universe. The ALPHA antihyd…
Confinement of antihydrogen for 1000 seconds
ALPHA Collaboration, G. B. Andresen, M. D. Ashkezari +36
Atoms made of a particle and an antiparticle are unstable, usually surviving less than a microsecond. Antihydrogen, made entirely of antiparticles, is believed to be stable, and it…
J/psi suppression at forward rapidity in Au+Au collisions at sqrt(s_NN)=200 GeV
A. Adare, S. Afanasiev, C. Aidala +381
Heavy quarkonia are observed to be suppressed in relativistic heavy ion collisions relative to their production in p+p collisions scaled by the number of binary collisions. In orde…