Author

DIRAC Collaboration

results may include different authors with the same name

5 papers

Measurement of the $\pi K$ atom lifetime and the $\pi K$ scattering length

After having announced the statistically significant observation (5.6~$\sigma$) of the new exotic $\pi K$ atom, the DIRAC experiment at the CERN proton synchrotron presents the measurement of the corresponding atom lifetime, based on the…

High Energy Physics - Experiment · Physics 2017-09-27 DIRAC Collaboration , B. Adeva , L. Afanasyev , Y. Allkofer , C. Amsler , A. Anania , S. Aogaki , A. Benelli , V. Brekhovskikh , T. Cechak , M. Chiba , P. Chliapnikov , D. Drijard , A. Dudarev , D. Dumitriu , P. Federicova , D. Fluerasu , A. Gorin , O. Gorchakov , K. Gritsay , C. Guaraldo , M. Gugiu , M. Hansroul , Z. Hons , S. Horikawa , Y. Iwashita , V. Karpukhin , J. Kluson , M. Kobayashi , V. Kruglov , L. Kruglova , A. Kulikov , E. Kulish , A. Kuptsov , A. Lamberto , A. Lanaro , R. Lednicky , C. Marinas , J. Martincik , L. Nemenov , M. Nikitin , K. Okada , V. Olchevskii , M. Pentia , A. Penzo , M. Plo , P. Prusa , G. Rappazzo , A. Romero Vidal , A. Ryazantsev , V. Rykalin , J. Saborido , J. Schacher , A. Sidorov , J. Smolik , F. Takeutchi , L. Tauscher , T. Trojek , S. Trusov , T. Urban , T. Vrba , V. Yazkov , Y. Yoshimura , M. Zhabitsky , P. Zrelov

Experimental status of pionium at CERN

The DIRAC Collaboration presents a first search for "atomic pi(+) pi(-) pairs" from ionization of pionium.

High Energy Physics - Phenomenology · Physics 2017-08-23 J. Schacher , DIRAC Collaboration

Observation of $\pi^- K^+$ and $\pi^+ K^-$ atoms

The observation of hydrogen-like $\pi K$ atoms, consisting of $\pi^- K^+$ or $\pi^+ K^-$ mesons, is presented. The atoms have been produced by 24 GeV/$c$ protons from the CERN PS accelerator, interacting with platinum or nickel foil…

High Energy Physics - Experiment · Physics 2016-09-14 DIRAC Collaboration

First observation of long-lived $\pi^+ \pi^-$ atoms

After observing and investigating the double-exotic $\pi^+\pi^-$ atom with the ground state lifetime $\tau$ of about $3 \times 10^{-15}$~s, the upgraded DIRAC experiment at the CERN PS accelerator observes for the first time long-lived…

High Energy Physics - Experiment · Physics 2015-08-20 DIRAC Collaboration

DIRAC: A High Resolution Spectrometer for Pionium Detection

The DIRAC spectrometer has been commissioned at CERN with the aim of detecting $\pi^+ \pi^-$ atoms produced by a 24 GeV/$c$ high intensity proton beam in thin foil targets. A challenging apparatus is required to cope with the high…

High Energy Physics - Experiment · Physics 2012-08-27 DIRAC Collaboration