ELPH seminar

ELPH seminar

Research Center for Electron Photon ScienceTohoku University

ELPH seminar
講師： Catalina Curceanu
Laboratori Nazionali di Frascati dell’INFN, Via E. Fermi 40, 00044 Frascati(Roma), Italy
日時： 12月20日（火）10:00 – 10:50
場所： 電子光理学研究センター三神峯ホール

Kaonic atoms at the DAΦNE Collider in Italy: astrangeness Odyssey
The low-energy QCD, the theory within the Standard Model describing the strong
interaction, is still missing fundamental experimental results in order to achieve abreakthrough in its understanding. Among these experimental results, the low-energy
kaon-nucleon/nuclei interaction studies are playing a key-role, with importantconsequences going from particle and nuclear physics to astrophysics (neutron stars andtheir equation of state).
Combining the excellent quality of the low-energy kaon beam delivered by the DAΦNE
collider in Frascati (Italy) with new experimental techniques, as fast and very precise X
ray detectors, like the Silicon Drift Detectors, we have performed unprecedented
measurements in the low-energy strangeness sector in the framework of the SIDDHARTA
Collaboration and are presently running the SIDDHARTA-2 experiment for thechallenging kaonic atoms measurements, such as kaonic deuterium first measurement.
I shall introduce the physics of kaonic atoms, the experiment and the first results, anddiscuss future plans.
The experiments at the DAΦNE collider represents an unique opportunity in the world
to, finally, unlock the secrets of the QCD in the strangeness sector and contribute to better
understand the role of strangeness in the Universe, from nuclei to the stars.
世話人：大西宏明（ohnishi@lns.tohoku.ac.jp）

Tohoku University
Research Center for Electron Photon Science

ELPH seminar

ELPH seminarELPH seminar

ELPH seminar

Research Center for Electron Photon ScienceTohoku University

ELPH seminar
講師： Francesco Sgaramella
Laboratori Nazionali di Frascati dell’INFN, Via E. Fermi 40, 00044 Frascati(Roma), Italy
日時： 12月20日（火）10:50 – 11:40
場所： 電子光理学研究センター三神峯ホール

Kaonic Atom X-ray spectroscopy: the kaon mass puzzle
Kaonic atoms X-ray spectroscopy is a unique tool to provide experimental data withconsequences going from particle and nuclear physics to astrophysics. 30 years ago,kaonic atoms were used to measure the charged kaon mass with unprecedented precision.
However, there is still a discrepancy of 60 keV between the two most precise
measurements, leading to an error of 16 keV on the charged kaon mass with severe
consequences for particle physics and all those processes in which kaons are involved,
such as the charmonium spectrum.
Combining the excellent quality of the low-energy kaon beam delivered by the DAΦNE
collider in Frascati (Italy) with new experimental techniques, as fast and very precise Xray detectors, we have performed unprecedented measurements of medium and heavy
mass kaonic atoms, in the framework of the SIDDHARTA Collaboration, withimplication on the charged kaon mass.
I shall introduce the kaon mass puzzle, the first measurement of the kaonic neon, theongoing measurement of the kaonic lead and their impact on the kaon mass. Finally, I
shall discuss future measurements that can lead to the solution of the kaon mass puzzle.
世話人：大西宏明（ohnishi@lns.tohoku.ac.jp）

Tohoku University
Research Center for Electron Photon Science

ELPH seminar

ELPH seminar