ATLAS data preparation in run 2 Laycock, PJ; Chelstowska, MA; Donszelmann, TC ...
Journal of physics. Conference series,
10/2017, Letnik:
898, Številka:
4
Journal Article
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In this contribution, the data preparation workflows for Run 2 are presented. The challenges posed by the excellent performance and high live time fraction of the LHC are discussed, and the solutions ...implemented by ATLAS are described. The prompt calibration loop procedures are described and examples are given. Several levels of data quality assessment are used to quickly spot problems in the control room and prevent data loss, and to provide the final selection used for physics analysis. Finally the data quality efficiency for physics analysis is shown.
Top quark production at the Tevatron Shabalina, E.
The European physical journal. C, Particles and fields,
7/2004, Letnik:
33, Številka:
S1
Journal Article
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AbstractPreliminary results on the \(t\bar{t}\) production cross section measurement at a center-of-mass energy of 1.96 TeV carried out by the CDF and DØ collaborations are presented. The data ...samples used for the analyses are collected in the current Tevatron run. PACS: 14.65.Ha Top quarks – 13.85.Qk Hadron-induced inclusive production with identified leptons, photons, or other nonhadronic particles (energy > 10 GeV) – 13.85.Lg Hadron-induced total cross sections (energy > 10 GeV)
Investigations are conducted on primiparous Holstein cows imported from Austria and those of the local population. It is established that realization of the genetic productivity potential of the ...imported animals in the studied ecological environment is determined 85.2% by a system of adaptive functions of the organism. The effect of metabolism and natural resistance on thermal stability, survivability, and productivity of cows of different ecogenesis is determined.
We examine a two-dimensional model problem of architectural acoustics on sound propagation in a rectangular room with windows. It is supposed that the walls are ideally flat and hard; the windows ...absorb all energy that falls upon them. We search for the modes of such a room having minimal attenuation indices, which have the expressed structure of billiard trajectories. The main attenuation mechanism for such modes is diffraction at the edges of the windows. We construct estimates for the attenuation indices of the given modes based on the solution to the Weinstein problem. We formulate diffraction problems similar to the statement of the Weinstein problem that describe the attenuation of billiard modes in complex situations.
Evidence for a B-s(0)pi(+/-) State Askew, A.; Aushev, V.; Avila, C. ...
Physical review letters,
07/2016, Letnik:
117, Številka:
2
Journal Article
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We report evidence for a narrow structure, X(5568), in the decay sequence X(5568) -> B-s(0)pi(+/-), B-s(0) -> J/psi phi, J/psi -> mu(+)mu(-), phi -> K+K-. This is evidence for the first ...instance of a hadronic state with valence quarks of four different flavors. The mass and natural width of this state are measured to be m = 5567.8 +/- 2.9(stat)(-1.9)(+0.9) (syst) MeV/c(2) and Gamma = 21.9 +/- 6.4(stat)(-2.5)(+5.0) (syst) MeV/c(2). If the decay is X(5568) -> B-s*pi(+/-). B-s(0)gamma pi(+/-) with an unseen gamma, m(X(5568)) will be shifted up by m(B-s*) - m(B-s(0)) similar to 49 MeV/c(2). This measurement is based on 10.4 fb(-1) of p (p) over bar collision data at root s = 1.96 TeV collected by the D0 experiment at the Fermilab Tevatron collider.
According to data from scientific literature, children who experience living in child institutions (or baby homes) with social and emotional deprivation are significantly behind their peers in ...development, but after moving to a foster family (FF), this gap can lessen. Further published information shows, there is evidence that age of a child and time characteristics in the form of length of stay in an institution or in family play a significant role in “catching up”. The aim of this research was to study the relationship of the age of children, as well as length of stay in the baby home (BH) and in a FF with indicators of caregiver-child interaction at both stages (1) in the BH before transfer to post-institutional care and (2) after transfer to FF. The study involved 21 children with experience of institutionalization (the average age of children at the assessment in the BH was 21.6 ± 12.7 months; at the foster families stage was 49.8 ± 16.7 months) and their caregivers (personnel of BH and substitute parents in FF). The quality of caregiver-child interaction was studied using the PCERA (The Parent - Child Early Relational Assessment) method based on analysis of video recordings of caregiver-child free play. The results obtained in the BH before transfer to post-institutional care indicate the presence of a positive relationship between individual caregiver and child indicators of interaction, as well as the overall total indicator of interaction with the age of children at the time of assessment. The indicator of interaction on the part of children "Positive emotions, eye contact" is associated with the age at which children entered the BH. After the transition of children to FF, most of the indicators on the part of children are associated with the age at which they entered the BH, while “Emotional stability, absence of negative affect, compliance” shown by the children is associated with the age of transition to FF. The data obtained in the work are discussed from the point of view of the influence of the social and emotional experience of children on the indicators of their interaction with the caregivers.
We describe an analysis comparing the p (p) over bar elastic cross section as measured by the D0 Collaboration at a center-of-mass energy of 1.96 TeV to that in pp collisions as measured by the TOTEM ...Collaboration at 2.76, 7, 8, and 13 TeVusing a model-independent approach. The TOTEM cross sections, extrapolated to a center-of-mass energy of root s = 1.96 TeV, are compared with the D0 measurement in the region of the diffractive minimum and the second maximum of the pp cross section. The two data sets disagree at the 3.4s level and thus provide evidence for the t-channel exchange of a colorless, C-odd gluonic compound, also known as the odderon. We combine these results with a TOTEM analysis of the same C-odd exchange based on the total cross section and the ratio of the real to imaginary parts of the forward elastic strong interaction scattering amplitude in pp scattering for which the significance is between 3.4s and 4.6s. The combined significance is larger than 5 sigma and is interpreted as the first observation of the exchange of a colorless, C-odd gluonic compound.
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