Search for f1(1285)→π+π−π0f_1(1285) \to \pi^+\pi^-\pi^0 decay with VES detector

The isospin violating decay $f_1(1285)\to\pi^+\pi^-\pi^0$ has been studied at VES facility. This study is based at the statistics acquired in $\pi^- Be$ interactions at 27, 36.6 and 41 GeV/c in diffractive reaction $\pi^- N \to (f_1 \pi^-) N$. The $f_1(1285) \to \pi^+\pi^-\pi^0$ decay is observed. The ratio of decay probabilities $BR(f_1(1285) \to \pi^+\pi^-\pi^0)$ to $BR(f_1(1285) \to \eta \pi^+\pi^-) \cdot BR(\eta \to \gamma\gamma)$ is $\sim\:1.4$.Comment: 10 pages, 8 figures, presented at XII Conference on Hadron Spectroscop

An observation of the f0(1710)f_0(1710) meson in the ωϕ\omega\phi system in the Pion-BeBe Interaction at Momentum of 29 GeV

The charge-exchange reaction $\pi^-p \rightarrow n\,\omega(783)\phi(1020)$, $\omega \rightarrow \pi^+\pi^-\pi^0$, $\phi \rightarrow K^+K^-$ is studied with the upgraded VES facility (U-70, Protvino) in the interaction of a 29 GeV pion beam with a beryllium target. The distribution over the invariant mass of the system $M_{\omega\phi}$ shows a near-threshold signal. A partial wave analysis reveals that the scalar state ($J^{PC}=0^{++}$) dominates in this mass region. The observed signal can be described with a contribution of the known resonance $f_0(1710)$. Using OPE approximation for the reaction $\pi^-p \rightarrow n\, f_0(1710)$ the product of branching fractions is found to be: $Br(f_0(1710)\rightarrow \pi\pi)\cdot Br(f_0(1710)\rightarrow \omega\phi) = (4.8 \pm 1.2) \cdot 10^{-3}$

Volume element structure and roton-maxon-phonon excitations in superfluid helium beyond the Gross-Pitaevskii approximation

We propose a theory which deals with the structure and interactions of volume elements in liquid helium II. The approach consists of two nested models linked via parametric space. The short-wavelength part describes the interior structure of the fluid element using a non-perturbative approach based on the logarithmic wave equation; it suggests the Gaussian-like behaviour of the element's interior density and interparticle interaction potential. The long-wavelength part is the quantum many-body theory of such elements which deals with their dynamics and interactions. Our approach leads to a unified description of the phonon, maxon and roton excitations, and has noteworthy agreement with experiment: with one essential parameter to fit we reproduce at high accuracy not only the roton minimum but also the neighboring local maximum as well as the sound velocity and structure factor.Comment: 9 pages, 6 figure

Клинический случай эффективного хирургического лечения пациентки с IV стадией рака почки с инвазией в печень с 50 % саркоматоидным компонентом почечно-клеточного рака без отдаленного метастазирования

The article describes a clinical case of effective surgical treatment of a 51-year-old female patient with sarcomatoid renal cell carcinoma of the right kidney accompanied by invasion into the liver. The surgical treatment consisted of right-side nephradrenalectomy with thrombectomy and hemihepatectomy. Histolopathology report revealed mixed renal cell carcinoma, comprised of clear cell (50 % of tumor tissue) and sarcomatoid (50 % of tumor tissue) grade III cancer (Fuhrman Nuclear Grade). During 36-month dynamic observation no recurrence or progression was observed.В статье описан клинический случай успешного хирургического лечения пациентки 51 года с саркоматоидным почечно-клеточным раком правой почки с инвазией в печень. Хирургическое лечение заключалось в нефрадреналэктомии справа с тромбэктомией и гемигепатэктомией. По данным гистологического заключения выявлен почечно-клеточный рак смешанного строения, представленный светлоклеточным (50 % ткани опухоли) и саркоматоидным (50 % ткани опухоли) раком III степени злокачественности (по Фурман). При динамическом наблюдении в течение 36 мес рецидива и прогрессирования заболевания не выявлено

Лекарственные возможности лечения пожилых пациентов с метастатическим кастрационно-резистентным раком предстательной железы

Oncological disease in the elderly is a serious challenge to the patients health and medical staff. This is due to two main reasons. First, it is the general patient condition which weakened by the aging process, usually with the multiple co-morbidities, the second reason is conducted with multiple drugs therapy of intercurrent diseases. Most often, oncologists do not seek to prescribe anticancer drugs, and mainly it concerns chemotherapy, to patients of advanced age, fearing the excess toxicity leading to adverse effects. The age 70 years and over is that cut-off to determine the elderly patient with malignancy. If we take the cases of the metastatic castration-resistant prostate cancer (mCRPC) many, if not the majority, are the patients older than 70 years, as well significant the number of very elderly patients aged over 80 years. The presence of the various medicinal agents in medical arsenal can significantly prolong survival, including such patients. As a rule, in randomized trials, which studied the drugs for the mCRPC treatment, the elderly patients were not actively involved and it had some reason, related to comorbidity. In this review the available data on the elderly and very elderly patients with mCRPC who received the treatment within the clinical trials are considered. Онкологическое заболевание в пожилом возрасте – серьезная проблема для здоровья пациента и медицинского персонала. Это связано с 2 основными причинами: общим состоянием больного, ослабленного процессом старения, как правило, с несколькими сопутствующими патологиями и терапией интеркуррентных заболеваний, проводимой несколькими препаратами. Чаще всего врачи-онкологи стремятся не назначать противоопухолевые препараты (в основном это касается химиотерапии) больным преклонного возраста, опасаясь избыточной токсичности, приводящей к неблагоприятным последствиям. Возраст 70 лет и старше является отсечкой для определения пациента пожилого возраста со злокачественным новообразованием. Многие случаи метастатического кастрационно-резистентного рака предстательной железы (мКРРПЖ) регистрируются у больных старше 70 лет, также существенно число очень пожилых пациентов в возрасте старше 80 лет. Наличие различных лекарственных агентов в арсенале врачей может значительно увеличить выживаемость, в том числе таких больных. В рандомизированные исследования, в которых изучались препараты для лечения мКРРПЖ, пожилые пациенты, как правило, включались недостаточно активно в связи с коморбидностью. В данном обзоре рассматриваются имеющиеся данные о пожилых и очень пожилых пациентах с мКРРПЖ, которые получали лечение в рамках клинических исследований.

Single hadron response measurement and calorimeter jet energy scale uncertainty with the ATLAS detector at the LHC

The uncertainty on the calorimeter energy response to jets of particles is derived for the ATLAS experiment at the Large Hadron Collider (LHC). First, the calorimeter response to single isolated charged hadrons is measured and compared to the Monte Carlo simulation using proton-proton collisions at centre-of-mass energies of sqrt(s) = 900 GeV and 7 TeV collected during 2009 and 2010. Then, using the decay of K_s and Lambda particles, the calorimeter response to specific types of particles (positively and negatively charged pions, protons, and anti-protons) is measured and compared to the Monte Carlo predictions. Finally, the jet energy scale uncertainty is determined by propagating the response uncertainty for single charged and neutral particles to jets. The response uncertainty is 2-5% for central isolated hadrons and 1-3% for the final calorimeter jet energy scale.Comment: 24 pages plus author list (36 pages total), 23 figures, 1 table, submitted to European Physical Journal

Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC

Measurements are presented of production properties and couplings of the recently discovered Higgs boson using the decays into boson pairs, H →γ γ, H → Z Z∗ →4l and H →W W∗ →lνlν. The results are based on the complete pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at centre-of-mass energies of √s = 7 TeV and √s = 8 TeV, corresponding to an integrated luminosity of about 25 fb−1. Evidence for Higgs boson production through vector-boson fusion is reported. Results of combined fits probing Higgs boson couplings to fermions and bosons, as well as anomalous contributions to loop-induced production and decay modes, are presented. All measurements are consistent with expectations for the Standard Model Higgs boson

Standalone vertex finding in the ATLAS muon spectrometer

A dedicated reconstruction algorithm to find decay vertices in the ATLAS muon spectrometer is presented. The algorithm searches the region just upstream of or inside the muon spectrometer volume for multi-particle vertices that originate from the decay of particles with long decay paths. The performance of the algorithm is evaluated using both a sample of simulated Higgs boson events, in which the Higgs boson decays to long-lived neutral particles that in turn decay to bbar b final states, and pp collision data at √s = 7 TeV collected with the ATLAS detector at the LHC during 2011