Alignement experience in STAR

The STAR experiment at RHIC uses four layers of silicon strip and silicon drift detectors for secondary vertex reconstruction. An attempt for a direct charm meson measurement put stringent requirements on alignment and calibration. We report on recent alignment and drift velocity calibration work performed on the inner silicon tracking system

Search for the Radiative Capture d+d->^4He+\gamma Reaction from the dd\mu Muonic Molecule State

A search for the muon catalyzed fusion reaction dd --> ^4He +\gamma in the dd\mu muonic molecule was performed using the experimental \mu CF installation TRITON and NaI(Tl) detectors for \gamma-quanta. The high pressure target filled with deuterium at temperatures from 85 K to 800 K was exposed to the negative muon beam of the JINR phasotron to detect \gamma-quanta with energy 23.8 MeV. The first experimental estimation for the yield of the radiative deuteron capture from the dd\mu state J=1 was obtained at the level n_{\gamma}\leq 2\times 10^{-5} per one fusion.Comment: 9 pages, 3 Postscript figures, submitted to Phys. At. Nuc

Correlations in STAR: interferometry and event structure

STAR observes a complex picture of RHIC collisions where correlation effects of different origins -- initial state geometry, semi-hard scattering, hadronization, as well as final state interactions such as quantum intensity interference -- coexist. Presenting the measurements of flow, mini-jet deformation, modified hadronization, and the Hanbury Brown and Twiss effect, we trace the history of the system from the initial to the final state. The resulting picture is discussed in the context of identifying the relevant degrees of freedom and the likely equilibration mechanism.Comment: 8 pages, 6 figures, plenary talk at the 5th International Conference on Physics and Astrophysics of Quark Gluon Plasma, to appear in Journal of Physics G (http://www.iop.org

Azimuthal anisotropy and correlations at large transverse momenta in p+p and Au+Au collisions at sqrt[sNN] = 200 GeV

Results on high transverse momentum charged particle emission with respect to the reaction plane are presented for Au+Au collisions at sqrt[sNN]=200 GeV. Two- and four-particle correlations results are presented as well as a comparison of azimuthal correlations in Au+Au collisions to those in p+p at the same energy. The elliptic anisotropy v2 is found to reach its maximum at pt~3 GeV/c, then decrease slowly and remain significant up to pt ~ 7-10 GeV/c. Stronger suppression is found in the back-to-back high-pt particle correlations for particles emitted out of plane compared to those emitted in plane. The centrality dependence of v2 at intermediate pt is compared to simple models based on jet quenching

Strangelet search at RHIC

Two position sensitive Shower Maximum Detector (SMDs) for Zero-Degree Calorimeters (ZDCs) were installed by STAR before run 2004 at both upstream and downstream from the interaction point along the beam axis where particles with small rigidity are swept away by strong magnetic field. The ZDC-SMDs provides information about neutral energy deposition as a function of transverse position in ZDCs. We report the preliminary results of strangelet search from a triggered data-set sampling 100 million Au+Au collisions at top RHIC energy.Comment: Strange Quark Matter 2004 conference proceedin

Neutral Kaon Interferometry in Au+Au collisions at sqrt(s_NN) = 200 GeV

We present the first statistically meaningful results from two-K0s interferometry in heavy-ion collisions. A model that takes the effect of the strong interaction into account has been used to fit the measured correlation function. The effects of single and coupled channel were explored. At the mean transverse mass m_T = 1.07 GeV, we obtain the values R = 4.09 +/- 0.46 (stat.) +/- 0.31 (sys) fm and lambda = 0.92 +/- 0.23 (stat) +/- 0.13 (sys), where R and lambda are the invariant radius and chaoticity parameters respectively. The results are qualitatively consistent with m_T systematics established with pions in a scenario characterized by a strong collective flow.Comment: 11 pages, 10 figure

СОСТОЯНИЕ ОБМЕНА ВЕЩЕСТВ, ОРГАНОВ ПИЩЕВАРЕНИЯ, РЕПРОДУКТИВНОЙ СИСТЕМЫ И ДИСТАЛЬНЫХ ОТДЕЛОВ КОНЕЧНОСТЕЙКРУПНОГО РОГАТОГО СКОТА В УДМУРТСКОЙ РЕСПУБЛИКЕ

The paper explores metabolic peculiarities, immune-biochemical status of mother-cows and their calves in breed livestock farms and commercial farm of the Udmurtian Republic. The authors outline relation between defects of biochemical blood parameters and pathology of digestive apparatus, reproductive system and distal limbs. The article reflects data on the status of digestible apparatus, distal limbs and reproductive system of cows in breed livestock farms and peculiarities of endocrine capacities. The publication contains data on fertility, status and quality of feeding, proportion of diseases and cow disposal. The authors determine gynecological diseases, mastitis and limbs disease of cows in the Udmurtian Republic in 2012–2014 whereas process defect is 37 %. Analysis of blood serum shows low and medium asidoses 38–75.7 % and 90 % in some districts. The authors determine the reasons of calves aged 3–4 months age reponse to pneumoenteritis. The research recommends arranging cows and calves feeding according to fertility and metabolic status, making balance in protein consumption, sugar, microelements and macroelements and vitamins. The researchers suggest arranging forage conservation and storage and sufficient feeding with concentrated feeds; making herd high immunity with application of vaccines and natural resistance adjusted for metabolism and medical aids.Изучены особенности обмена веществ у  коров в  племенных и  товарных хозяйствах Удмуртской Республики, в том числе иммунобиохимического статуса коров-матерей и полученных от них телят. Определена взаимосвязь нарушений биохимических показателей крови с патологией органов пищеварения, репродуктивной системы и дистальных отделов конечностей. В работе изложены материалы о состоянии органов пищеварения, дистальных отделов конечностей и репродуктивной системы у коров в племенных хозяйствах, а также об особенностях работы эндокринных органов. Отражены данные о  продуктивности, состоянии и  качестве кормления, удельном весе заболеваний и выбраковке молочных коров за ряд лет. В структуре болезней коров по Удмуртской Республике за 2012–2014 гг. первое место занимают гинекологические болезни, второе – маститы и третье – болезни конечностей. На технологический брак приходится всего в среднем 37%. Анализ данных показателей сыворотки крови свидетельствует о наличии ацидозов слабой и средней степени тяжести – от 38 до 75,7% по стаду, а в некоторых районах до 90%. Определены причины восприимчивости телят до 3–4-месячного возраста к  пневмоэнтеритам. На основании исследований рекомендовано организовывать уровень кормления коров и телят в зависимости не только от продуктивности, но и от состояния обмена веществ, балансируя корма по потребности в белке, сахарах, микро-, макроэлементах и витаминах; совершенствовать технологии заготовки и  хранения кормов, проводить надлежащую подготовку концентрированных кормов к скармливанию; создавать стадный иммунитет высокого уровня с подбором необходимых вакцин и уровень естественной резистентности с учетом обмена веществ и применяемых медикаментозных средств

The T2K Side Muon Range Detector

The T2K experiment is a long baseline neutrino oscillation experiment aiming to observe the appearance of {\nu} e in a {\nu}{\mu} beam. The {\nu}{\mu} beam is produced at the Japan Proton Accelerator Research Complex (J-PARC), observed with the 295 km distant Super- Kamiokande Detector and monitored by a suite of near detectors at 280m from the proton target. The near detectors include a magnetized off-axis detector (ND280) which measures the un-oscillated neutrino flux and neutrino cross sections. The present paper describes the outermost component of ND280 which is a side muon range detector (SMRD) composed of scintillation counters with embedded wavelength shifting fibers and Multi-Pixel Photon Counter read-out. The components, performance and response of the SMRD are presented.Comment: 13 pages, 19 figures v2: fixed several typos; fixed reference

A Long Baseline Neutrino Oscillation Experiment Using J-PARC Neutrino Beam and Hyper-Kamiokande

Document submitted to 18th J-PARC PAC meeting in May 2014. 50 pages, 41 figuresDocument submitted to 18th J-PARC PAC meeting in May 2014. 50 pages, 41 figuresDocument submitted to 18th J-PARC PAC meeting in May 2014. 50 pages, 41 figuresHyper-Kamiokande will be a next generation underground water Cherenkov detector with a total (fiducial) mass of 0.99 (0.56) million metric tons, approximately 20 (25) times larger than that of Super-Kamiokande. One of the main goals of Hyper-Kamiokande is the study of $CP$ asymmetry in the lepton sector using accelerator neutrino and anti-neutrino beams. In this document, the physics potential of a long baseline neutrino experiment using the Hyper-Kamiokande detector and a neutrino beam from the J-PARC proton synchrotron is presented. The analysis has been updated from the previous Letter of Intent [K. Abe et al., arXiv:1109.3262 [hep-ex]], based on the experience gained from the ongoing T2K experiment. With a total exposure of 7.5 MW $\times$ 10$^7$ sec integrated proton beam power (corresponding to $1.56\times10^{22}$ protons on target with a 30 GeV proton beam) to a $2.5$-degree off-axis neutrino beam produced by the J-PARC proton synchrotron, it is expected that the $CP$ phase $\delta_{CP}$ can be determined to better than 19 degrees for all possible values of $\delta_{CP}$, and $CP$ violation can be established with a statistical significance of more than $3\,\sigma$ ($5\,\sigma$) for $76$ ($58$) of the $\delta_{CP}$ parameter space