Read more ...Scientists involved in the Borexino collaboration have presented new results of the measurement of neutrinos originating from the interior of the Earth. The Borexino detector is located 1,400 metres below the Earth's surface in the Gran Sasso massif near Rome. The elusive "ghost particles" rarely interact with matter, making their detection extremely difficult. With this update, the researchers have now been able to access almost twice as many events as in the previous analysis of the data. The results provide an exclusive insight into processes and conditions in the Earth's interior that remain puzzling to this day.

Read more ...At the beginning of December 2019, the cryostat for obtaining ultra-low temperatures, developed and produced under the guidance of Yuri Andreyevich Usov in the DLNP Sector of Low Temperatures, was transported to the JINR customs warehouse. The cryostat is an important part of a new frozen polarized target for polarization experiments at the ELSA accelerator of the University of Bonn. This polarized target is being created in cooperation between DLNP and two universities (in Bonn and Mainz) for conducting double polarization experiments (beam + target). The studies are performed within the Crystal Barrel collaboration.

Read more ...Last Friday, the 70th anniversary of the launch of the JINR Synchrocyclotron was celebrated. At the festive lunch, heroic creators of the Synchrocyclotron, all veterans of the Laboratory of Nuclear Problems were honoured. The whole history of the oldest JINR laboratory, all achieved and world-recognized results of its scientific staff, considerable experience accumulated in the fields of nuclear physics, high-energy physics, condensed matter physics – all this is closely connected with the launch and long-term successful operation of the Synchrocyclotron in Dubna.

Last week, from 21 - 26 October, the first international meeting of the Baikal-GVD collaboration on data analysis and project modelling was held in Prague, at the Institute of Experimental and Applied Physics.

Since 2015, in Lake Baikal, the neutrino telescope with an approximate volume of a cubic kilometer is being constructed. This facility aims at the investigation of cosmic high-energy neutrino fluxes, at the search for hypothetical particles – magnetic monopoles, as well as for candidates for dark matter. For the first time, the idea of neutrino registration by a detector of a cubic kilometer volume located in natural environment was mentioned by M.A. Markov in 1960.Read more ...

Read more ...Within the 126th session of the JINR Scientific Council, which took place in Dubna from 19 to 20 September 2019, Professor Francis Halzen (University of Wisconsin, Madison, USA) was awarded the Bruno Pontecorvo Prize 2018 for significant contribution to the IceCube detector construction and experimental discovery of high-energy astrophysical neutrinos.
Francis Halzen is a researcher in the fields of particle physics, astrophysics and cosmology. He works at the University of Wisconsin in Madison. He is the head of the IceCube project.

The Bruno Pontecorvo Prize is an international award being annually presented by the JINR Scientific Council for achievements in elementary particle physics.

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Today, the Kamchatka School on Elementary Particle Physics and Related Topics in Paratunka village, Kamchatka Federal Subject, begins its work. The School was initiated by the Joint Institute for Nuclear Research in association with the Vitus Bering Kamchatka State University and the Institute of Cosmophysical Research and Radio Wave Propagation FEB RAS.
The main goal of the School is to introduce undergraduates, postgraduates, young researchers and physics teachers from Kamchatka to both cutting-edge investigations of microworld physics and the science being advanced at JINR; to present prospects of cooperation; to establish contacts and launch collaborative projects with scientific organizations from other regions of RF. Introductory lectures on elementary particle physics, neutrino physics, application of elementary particle studies in geophysics and astrophysics make the core part of the scientific programme. Guest researchers from JINR and other Russia’s scientific institutions, eminent specialists in various fields of knowledge will hold these lectures.

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The 27th annual European School on High-Energy Physics (ESHEP2019) was given from 4 to 17 September 2019 in St. Petersburg. These Schools are systematically arranged in one of the Member States of two major international scientific centres: the European Organization for Nuclear Research (CERN, Geneva) and the Joint Institute for Nuclear Research (JINR, Dubna).
This series of schools, famous as CERN-JINR schools, traditionally attract much attention of the youth thanks to a sophisticated scientific programme, well-developed format, and a careful choice of lecturers and leaders of discussions.
About 100 listeners from more than 30 countries participated in the School. Most of them are post-graduate students who finish their dissertations, possess a high scientific potential, and take part in recent research.
Leading scientists – world specialists in the main fields of modern high energy physics deliver their lectures and conduct discussions. In particular, a lecture on the Standard Model was given by A.V. Bednyakov, on cosmology – by V.A. Rubakov, on heavy quark physics – by M.I. Vysotskiy; A.V. Gladyshev, D.G. Levkov and E.Ya. Nugayev led discussions.
CERN Director-General Prof. Fabiola Gianotti and JINR Director, RAS Academician Victor Matveev presented traditional lectures on scientific programmes and prospects for research in the fields of high energy and particle physics.

In the frames of the School, a meeting with the participation of the public took place. The event started with a lecture by CERN Director-General Fabiola Gianotti, and continued with a question-and-answer session and a round-table discussion about the role of fundamental science in the development of the modern society. The JINR Director, RAS Academician V. A. Matveev, Deputy Academician Secretary and Head of the RAS Department of Physical Sciences Academician V. A. Rubakov, First Deputy Minister of Science and Higher Education, RAS Academician G. V. Trubnikov, SPbSTU Deputy Rector of Science Professor S.V. Mikuschev attended this meeting, as well as listeners of the School, researches and students from the institutions of higher education of St. Petersburg, and senior year students.

Thus, the whole series of European Schools of High-Energy Physics organized by CERN and JINR continues to fulfil its scientific and cultural mission at a high level constantly enhancing the programme and formats of interaction with the audience and the public.

Большинство результатов нейтринных осцилляционных экспериментов хорошо описываются трехкомпонентной теорией нейтрино (PMNS-матрица). Однако, ряд наблюдаемых аномалий (реакторная и галиевая нейтринные аномалии, противоречивые результаты в экспериментах LSND и MiniBooNE) можно объяснить, среди всего прочего, существованием стерильного нейтрино. Стерильное нейтрино может проявить себя как дефицит в количестве регистрируемых событий, зависящий от отношения L/E, дополнительный, по сравнению с осцилляциями активных нейтрино. Для дополнительной пары параметров Δm241 и sin2 2θ14 следует ожидать проявления осцилляций на более коротких расстояниях порядка метра.



Read more ... On 5-15 August 2019, the Precision Laser Inclinometer (PLI), an innovative instrument for monitoring angular microseismic activity, was installed and put into operation on the VIRGO Interferometric Gravitational-Wave Antenna (IGA) premises by a group of scientists including B. Di Girolamo (CERN), M.V. Lyablin (JINR), and N.S. Azaryan (JINR). The PLI will help reduce the effect of angular microseismic ground inclinations on the IGA sensitive elements, which will improve the IGA sensitivity in the range of frequencies corresponding to the merging of black holes and neutron stars in the universe.

A very inspiring video interview with Professor Mark Vagins from the University of Tokyo (IPMU, Japan, Kavli) and the University of California (USA, Irvine) about the 16th International Baksan School on Particle Astrophysics “Particles and Cosmology”.