LTP: Laboratory for Particle Physics
ERC Consolidator grant for Paolo Crivelli
Dr Paolo Crivelli (ETH Zurich, Department of Physics, Institute for Particle Physics and Astrophysics) has recently been awarded an ERC Consolidator grant for his project "Mu-MASS" aiming at a new precision measurement of the Muonium 1S-2S transition energy, ultimately with an improvement by three orders of magnitude. Muonium is the hydrogen-like atom formed by a positive muon and an electron. Its energy levels are, in contrast to the case of ordinary hydrogen, completely dominated by Quantum-Electro-Dynamics (QED) and precision QED calculations are currently ahead of experiment. It will be the first time that CW two-photon spectroscopy is applied to muonium. Results will improve our knowledge of the muon mass, test bound state QED and search for physics beyond the Standard Model of Particle Physics. Moreover, it will help to resolve the present 'proton radius puzzle' by providing a determination of the Rydberg constant free of finite size effects. While Dr. Crivelli is located at ETH H&oml;nggerberg, he and his team will spend a large amount of time at PSI and collaborate closely, both, with the NUM laboratories for Muon Spin Spectroscopy and for Particle Physics.
Eccellenza Professorship to Lea Caminada
Dr Lea Caminada, a researcher in the High-Energy Particle Physics group of the Laboratory for Particle Physics (LTP) in NUM, has been awarded a Swiss National Science Foundation (SNF) Eccellenza Professorial Fellowship. Together with the High-Energy Particle Physics group Lea is working for the CMS experiment at the LHC facility at CERN. Her research proposal consists of two parts. In the first one she proposes to investigate the decay of the Higgs boson into charm quarks, which will enable a deeper understanding of it's nature. The second part focuses on the further development of silicon pixel detectors, a speciality of the group at PSI. Lea obtained her PhD in 2010 at the ETH in Zurich. After a 4 year postdoc at LBNL in Berkeley she moved to the University of Zurich in 2014. Since 2016 she has been holding a joint scientist position at PSI and University of Zurich.
CMS Young Researcher Prize awarded to Lea Caminada
Lea Caminada, a researcher in the High-Energy Particle Physics group of the Laboratory for Particle Physics (LTP) in NUM, has received the annual CMS Young Researcher Prize. This Prize is given once a year to outstanding young physicists who made very significant and sustained contributions to the CMS experiment at the LHC facility at CERN. Dr. Caminada has been recognized for her contribution to the construction, installation and commissioning of the two pixel detectors which were build at PSI for the CMS experiment. Her work also included the measurement of the B-meson production cross section and the observation of the Higgs boson in association with top quarks.
Detailed polarization measurements of the prompt emission of five gamma-ray bursts
Gamma-ray bursts (GRBs) are the strongest explosions in the Universe since the Big Bang. They are believed to be produced either in the formation of black holes at the end of massive star evolution or the merging of compact objects.
Solid deuterium surface degradation at ultracold neutron sources
Solid deuterium (sD2) is used as an efficient converter to produce ultracold neutrons (UCN). Itis known that the sD2 must be sufficiently cold, of high purity and mostly in its ortho-state in order to guarantee long lifetimes of UCN in the solid from which they are extracted into vacuum.
Observation of ttH Production
The observation of Higgs boson production in association with a top quark-antiquark pair is reported, based on a combined analysis of proton-proton collision data at center-of-mass energies of √s = 7,8, and 13 TeV, corresponding to integrated luminosities of up to 5.1, 19.7, and 35.9 fb-1, respectively. The data were collected with the CMS detector at the CERN LHC.
Searching for New Physics with b → sτ+τ-
In recent years, intriguing hints for the violation of lepton flavor universality (LFU) have been accumulated in semileptonic B decays, both in the charged-current transitions b → cl-ν-l (i.e., RD, RD∗, and RJ/Ψ and the neutral-current transitions b → sl+l- (i.e., RK and RK∗.
The Charpak-Ritz Prize 2018 is awarded to Roland Paul Horisberger
The Charpak-Ritz Prize 2018, jointly awarded by the French Physical Society and the Swiss Physical Society, has been bestowed to Roland Paul Horisberger for his numerous contributions to the development of precision silicon vertex detectors for particle physics experiments as well as for the application of these technologies in X-ray photon sciences.
Jean-Baptiste Mosset winner of PSI Founder Fellowship
Jean-Baptiste Mosset from the Laboratory of Particle Physics is the winner of a PSI Founder Fellowship and plans now to commercialise a neutron detector to spot plutonium and uranium. With his new technology, less expensive and more efficient neutron detectors could be developed. In the next 18 months, Mosset wants to further develop his prototype and find out if demand for this technology exists in industry.
Search for Axionlike Dark Matter through Nuclear Spin Precession in Electric and Magnetic Fields
We report on a search for ultralow-mass axionlike dark matter by analyzing the ratio of the spin-precession frequencies of stored ultracold neutrons and 199Hg atoms for an axion-induced oscillating electric dipole moment of the neutron and an axion-wind spin-precession effect. No signal consistent with dark matter is observed for the axion mass range 10-24 ≤ ma ≤ 10-17eV.
Commissioning and first performance studies of the new CMS pixel detector
In the previous months the new CMS pixel detector was brought into operation. The detector was moved from PSI to CERN and installed in February, followed by an intensive period of commissioning and calibration. This process mostly involved the adjustment of many operational parameters which influence the detector performance, e.g.
Der Schwerarbeiter aus dem Misox
Aldo Antognini liegen Physik und Geselligkeit im BlutMehr als 2'200'000 Franken hat Aldo Antognini von der EU für sein neuestes Experiment bekommen. Er will herausfinden, wie der Magnetismus im Proton verteilt ist. Dabei wird der Teilchenphysiker nicht nur seine wissenschaflichen und technischen, sondern auch seine sozialen Talente einsetzen können.