Now showing items 2996-3015 of 5118

• #### Obesity status trajectory groups among elementary school children ﻿

(2016)
Background: Little is known about patterns in the transition from healthy weight to overweight or obesity during the elementary school years. This study examined whether there were distinct body mass index (BMI) trajectory groups among elementary school children, and predictors of trajectory group membership. Methods: This is a secondary analysis of ...
• #### Obesity status trajectory groups among elementary school children ﻿

(2016)
Background: Little is known about patterns in the transition from healthy weight to overweight or obesity during the elementary school years. This study examined whether there were distinct body mass index (BMI) trajectory groups among elementary school children, and predictors of trajectory group membership. Methods: This is a secondary analysis of ...
• #### Obesity, Dietary Factors, Nutrition, and Breast Cancer Risk ﻿

(2018)
Purpose of Review: To synthesize the critical role of obesity-associated inflammation, dietary factors, and nutrition in determining breast cancer risk. Recent Findings: Obesity-associated inflammation is strongly linked to breast cancer risk and progression, largely via two processes: inflammatory pathways and dysregulated metabolism. Cytokine ...
• #### Observation and modeling of the evolution of Texas power plant plumes ﻿

(2012)
During the second Texas Air Quality Study 2006 (TexAQS II), a full range of pollutants was measured by aircraft in eastern Texas during successive transects of power plant plumes (PPPs). A regional photochemical model is applied to simulate the physical and chemical evolution of the plumes. The observations reveal that SO2 and NOy were rapidly removed ...
• #### Observation of $t\overline{t}H$ Production ﻿

(2018)
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 ...
• #### Observation of a diffractive contribution to dijet production in proton-proton collisions at √s=7  TeV ﻿

(2013)
The cross section for dijet production in proton-proton collisions at √s=7  TeV is presented as a function of ξ˜, a variable that approximates the fractional momentum loss of the scattered proton in single-diffractive events. The analysis is based on an integrated luminosity of 2.7  nb−1 collected with the CMS detector at the LHC at low instantaneous ...
• #### Observation of a Helical Luttinger Liquid in InAs/GaSb Quantum Spin Hall Edges ﻿

(2015)
We report on the observation of a helical Luttinger liquid in the edge of an InAs/GaSb quantum spin Hall insulator, which shows characteristic suppression of conductance at low temperature and low bias voltage. Moreover, the conductance shows power-law behavior as a function of temperature and bias voltage. The results underscore the strong ...
• #### Observation of a narrow mass state decaying into Υ(1S)+γ in pp¯ collisions at √s=1.96  TeV ﻿

(2012)
Using data corresponding to an integrated luminosity of 1.3  fb−1, we observe a narrow mass state decaying into Υ(1S)+γ, where the Υ(1S) meson is detected by its decay into a pair of oppositely charged muons, and the photon is identified through its conversion into an electron-positron pair. The significance of this observation is 5.6 standard ...
• #### Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC ﻿

(2012)
Results are presented from searches for the standard model Higgs boson in proton–proton collisions at √s=7 and 8 TeV in the Compact Muon Solenoid experiment at the LHC, using data samples corresponding to integrated luminosities of up to 5.1 fb−1 at 7 TeV and 5.3 fb−1 at 8 TeV. The search is performed in five decay modes: γγ, ZZ, W+W−, τ+τ−, and bb¯. ...
• #### Observation of a new boson with mass near 125 GeV in pp collisions at √s=7 and 8 TeV ﻿

(2013)
A detailed description is reported of the analysis used by the CMS Collaboration in the search for the standard model Higgs boson in pp collisions at the LHC, which led to the observation of a new boson. The data sample corresponds to integrated luminosities up to 5.1 fb−1 at s√=7 TeV, and up to 5.3 fb−1 at √s=8 TeV. The results for five Higgs boson ...
• #### Observation of a New Ξb Baryon ﻿

(2012)
The observation of a new b baryon via its strong decay into Ξ−bπ+ (plus charge conjugates) is reported. The measurement uses a data sample of pp collisions at √s=7  TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 5.3  fb−1. The known Ξ−b baryon is reconstructed via the decay chain Ξ−b→J/ψΞ−→μ+μ−Λ0π−, with ...
• #### Observation of a peaking structure in the J/ψϕ mass spectrum from B±→ J/ψϕK± decays ﻿

(2014)
A peaking structure in the J/ψϕ mass spectrum near threshold is observed in B±→J/ψϕK± decays, produced in pp collisions at √s=7 TeV collected with the CMS detector at the LHC. The data sample, selected on the basis of the dimuon decay mode of the J/ψ, corresponds to an integrated luminosity of 5.2 fb−1. Fitting the structure to an S -wave relativistic ...
• #### Observation of an Energy-Dependent Difference in Elliptic Flow between Particles and Antiparticles in Relativistic Heavy Ion Collisions ﻿

(2013)
Elliptic flow (v2) values for identified particles at midrapidity in Au+Au collisions, measured by the STAR experiment in the beam energy scan at RHIC at √sNN=7.7–62.4  GeV, are presented. A beam-energy-dependent difference of the values of v2 between particles and corresponding antiparticles was observed. The difference increases with decreasing ...
• #### Observation of antiferromagnetic correlations in the Hubbard model with ultracold atoms ﻿

(2015)
Ultracold atoms in optical lattices have great potential to contribute to a better understanding of some of the most important issues in many-body physics, such as high-temperature superconductivity[1]. The Hubbard model—a simplified representation of fermions moving on a periodic lattice—is thought to describe the essential details of copper oxide ...
• #### Observation of B0 → ψ(2S)K0Sπ+π− and B0s → ψ(2S)K0S decays ﻿

(2022)
Using a data sample of s√=13TeV proton-proton collisions collected by the CMS experiment at the LHC in 2017 and 2018 with an integrated luminosity of 103~fb−1, the B0s→ψ(2S)K0S and B0→ψ(2S)K0Sπ+π− decays are observed with significances exceeding 5 standard deviations. The resulting branching fraction ratios, measured for the first time, correspond ...
• #### Observation of Bs0 mesons and measurement of the Bs0/B+ yield ratio in PbPb collisions at Image 1 TeV ﻿

(2022)
The Bs0 and B+ production yields are measured in PbPb collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data sample, collected with the CMS detector at the LHC, corresponds to an integrated luminosity of 1.7 nb−1. The mesons are reconstructed in the exclusive decay channels B→s0J/ψ(μ+μ−)ϕ(K+K−) and B→+J/ψ(μ+μ−)K+, in the transverse ...
• #### Observation of Charge Asymmetry Dependence of Pion Elliptic Flow and the Possible Chiral Magnetic Wave in Heavy-Ion Collisions ﻿

(2015)
We present measurements of π− and π+ elliptic flow, v2, at midrapidity in Au+Au collisions at √sNN=200, 62.4, 39, 27, 19.6, 11.5, and 7.7 GeV, as a function of event-by-event charge asymmetry, Ach, based on data from the STAR experiment at RHIC. We find that π− (π+) elliptic flow linearly increases (decreases) with charge asymmetry for most centrality ...
• #### Observation of Correlated Azimuthal Anisotropy Fourier Harmonics in $pp$ and $p+\mathrm{Pb}$ Collisions at the LHC ﻿

(2018)
The azimuthal anisotropy Fourier coefficients (vn) in 8.16 TeV p+Pb data are extracted via long-range two-particle correlations as a function of the event multiplicity and compared to corresponding results in pp and PbPb collisions. Using a four-particle cumulant technique, vn correlations are measured for the first time in pp and p+Pb collisions. ...
• #### Observation of D0 Meson Nuclear Modifications in Au+Au Collisions at √sNN=200  GeV ﻿

(2014)
We report the first measurement of charmed-hadron (D0) production via the hadronic decay channel (D0→K−+π+) in Au+Au collisions at √sNN=200  GeV with the STAR experiment. The charm production cross section per nucleon-nucleon collision at midrapidity scales with the number of binary collisions, Nbin, from p+p to central Au+Au collisions. The D0 meson ...
• #### Observation of D±s/D0 Enhancement in Au+Au Collisions at √sNN=200  GeV ﻿

(2021)
We report on the first measurement of charm-strange meson D±s production at midrapidity in Au+Au collisions at √sNN=200 GeV from the STAR experiment. The yield ratio between strange (D±s) and nonstrange (D0) open-charm mesons is presented and compared to model calculations. A significant enhancement, relative to a pythia simulation of p+p collisions, ...