912 research outputs found
Recommended from our members
Antibiotic Stewardship Education for the Treatment of Sinusitis in Primary Care
No full textPurpose: This quality improvement and professional development research project aimed to educate ambulatory care providers in southern Arizona on the most recent sinusitis clinical practice guideline and offer key patient communication strategies for discussing sinusitis treatment.Background: Acute sinusitis is a common condition, accounting for 20 million annual visits to an ambulatory setting in the United States (US). Providers frequently prescribe antibiotics for sinusitis even though most infections are of viral origin or are self-limiting. This practice increases the risk of antibiotic resistance and adverse drug reactions. To reduce inappropriate antibiotic use, continuing education of providers on current guidelines and methods for communicating with patients is necessary.
Methods: Guided by the Model for Improvement, participants completed online education that included a recorded presentation and two downloadable handouts. The full clinical practice guideline was also available to participants. After reviewing the education, participants completed an online retrospective pretest and posttest survey with questions pertaining to demographics, awareness of antibiotic resistance, knowledge of sinusitis guidelines, perceived patient satisfaction, and intent to prescribe antibiotics.
Results: Fourteen nurse practitioners from a variety of primary care and ambulatory settings completed the education and the retrospective pretest and posttest survey. After completing the education, 93% of nurse practitioners stated that they intended to use watchful waiting or delayed antibiotic prescriptions most of the time or almost always, versus 57% before the education. However, only 36% correctly answered a scenario-based question. Provider responses to other outcome measures were positive, but median changes in the Likert scale scores were modest.
Conclusions: The online education provided did increase nurse practitioners’ intent to prescribe less antibiotics for acute sinusitis patients. However, the education may not have been effective in helping providers determine which patients qualify for watchful waiting. The education also increased providers’ familiarity with the clinical practice guideline and their perceived ability to educate and better communicate with patients. A larger sample size and more work are needed to better quantify the impact of this educational intervention
Measurement of the CP-violating phase phi(s) in the B-s(0) -> J/psi phi(1020) -> mu(+)mu-K+K- channel in proton-proton collisions at root s=13 TeV
No full textThe CP-violating weak phase ?s and the decay width difference ??s between the light and heavy B0s mass eigenstates are measured with the CMS detector at the LHC in a sample of 48 500 reconstructed B0s? J/I) d (1020) ?11+11? K+K? events. The measurement is based on a data sample corresponding to an integrated luminosity of 96.4 fb?1, collected in proton-proton collisions at ?s = 13 TeV in 2017?2018. To extract the values of ?s and ??s, a time-dependent and flavor-tagged angular analysis of the 11+11?K+K? final state is performed. The analysis employs a dedicated tagging trigger and a novel opposite-side muon flavor tagger based on machine learning techniques. The measurement yields ?s = ?11 ?50 (stat) ? 10 (syst) mrad and ??s = 0.114 ? 0.014 (stat)? 0.007 (syst) ps?1, in agreement with the standard model predictions. When combined with the previous CMS measurement at ?s = 8 TeV, the following values are obtained: ?s = ?21 ? 44 (stat) ? 10 (syst) mrad, ??s = 0.1032 ? 0.0095 (stat) ? 0.0048 (syst) ps?1, a significant improvement over the 8 TeV result. ? 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY licens
Measurement of the B s 0 → J / ψK S 0 effective lifetime from proton-proton collisions at s = 13 TeV
No full textAbstract The effective lifetime of the B s 0 meson in the decay B s 0 → J / ψK S 0 is measured using data collected during 2016–2018 with the CMS detector in s = 13 TeV proton-proton collisions at the LHC, corresponding to an integrated luminosity of 140 fb−1. The effective lifetime is determined by performing a two-dimensional unbinned maximum likelihood fit to the B s 0 meson invariant mass and proper decay time distributions. The resulting value of 1.59 ± 0.07(stat) ± 0.03(syst) ps is the most precise measurement to date and is in good agreement with the expected value
Author Correction: A portrait of the Higgs boson by the CMS experiment ten years after the discovery
No full textIn the version of this article initially published, CMS Collaboration author names, affiliations and acknowledgements were omitted and have now been included in the HTML and PDF versions of the articl
Observation of B-s(0) mesons and measurement of the B-s(0)/B+ yield ratio in PbPb collisions at root S-NN=5.02 TeV
No full textThe B0
s 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
B0
s → J/ψ(μ+μ−)φ(K+K−) and B+ → J/ψ(μ+μ−)K+, in the transverse momentum range 7–50 GeV/c
and absolute rapidity 0–2.4. The B0
s meson is observed with a statistical significance in excess of five
standard deviations for the first time in nucleus-nucleus collisions. The measurements are performed as
functions of the transverse momentum of the B mesons and of the PbPb collision centrality. The ratio
of production yields of B0
s and B+ is measured and compared to theoretical models that include quark
recombination effects
Search for a heavy composite Majorana neutrino in events with dilepton signatures from proton-proton collisions at √s=13 Tev
No full textResults are presented of a search for a heavy Majorana neutrino N ⠃ decaying into two same-flavor leptons ⠃ (electrons or muons) and a quark-pair jet. A model is considered in which the N ⠃ is an excited neutrino in a compositeness scenario. The analysis is performed using a sample of proton-proton collisions at & RADIC;s = 13 TeV recorded by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 138 fb-1. The data are found to be in agreement with the standard model prediction. For the process in which the N ⠃ is produced in association with a lepton, followed by the decay of the N ⠃ to a same-flavor lepton and a quark pair, an upper limit at 95% confidence level on the product of the cross section and branching fraction is obtained as a function of the N ⠃ mass mN ⠃ and the compositeness scale ⠄. For this model the data exclude the existence of Ne (N & mu;) for mN ⠃ below 6.0 (6.1) TeV, at the limit where mN ⠃ is equal to ⠄. For mN ⠃ N 1 TeV, values of ⠄ less than 20 (23) TeV are excluded. These results represent a considerable improvement in sensitivity, covering a larger parameter space than previous searches in pp collisions at 13 TeV.& COPY; 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3
Measurement of the double-differential inclusive jet cross section in proton-proton collisions at s = 5.02 TeV
No full textAbstract The inclusive jet cross section is measured as a function of jet transverse momentum p T and rapidity y. The measurement is performed using proton-proton collision data at s = 5.02 TeV, recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 27.4 pb −1. The jets are reconstructed with the anti-k T algorithm using a distance parameter of R = 0.4, within the rapidity interval |y| < 2, and across the kinematic range 0.06 < p T < 1 TeV. The jet cross section is unfolded from detector to particle level using the determined jet response and resolution. The results are compared to predictions of perturbative quantum chromodynamics, calculated at both next-to-leading order and next-to-next-to-leading order. The predictions are corrected for nonperturbative effects, and presented for a variety of parton distribution functions and choices of the renormalization/factorization scales and the strong coupling α S
Bottom quark energy loss and hadronization with B+ and B s 0 nuclear modification factors using pp and PbPb collisions at s NN = 5.02 TeV
No full textAbstract The production cross sections of B s 0 and B+ mesons are reported in proton-proton (pp) collisions recorded by the CMS experiment at the CERN LHC with a center-of-mass energy of 5.02 TeV. The data sample corresponds to an integrated luminosity of 302 pb−1. The cross sections are based on measurements of the B s 0 → J/ψ(μ+μ−)ϕ(1020)(K+K−) and B+ → J/ψ(μ+μ−)K+ decay channels. Results are presented in the transverse momentum (pT) range 7–50 GeV/c and the rapidity interval |y| 10 GeV/c, both mesons are found to be suppressed in PbPb collisions (with RAA values significantly below unity), with less suppression observed for the B s 0 mesons. In this pT range, the RAA values for the B+ mesons are consistent with those for inclusive charged hadrons and D0 mesons. Below 10 GeV/c, both B+ and B s 0 are found to be less suppressed than either inclusive charged hadrons or D0 mesons, with the B s 0 RAA value consistent with unity. The RAA values found for the B+ and B s 0 are compared to theoretical calculations, providing constraints on the mechanism of bottom quark energy loss and hadronization in the quark-gluon plasma, the hot and dense matter created in ultrarelativistic heavy ion collisions
Measurement of the C P-violating phase φs in the B0 s → J/ψφ(1020) → μ+μ− K+K− channel in proton-proton collisions at √s = 13 TeV
No full textThe C P-violating weak phase φs and the decay width difference s between the light and heavy B0
s
mass eigenstates are measured with the CMS detector at the LHC in a sample of 48 500 reconstructed
B0
s → J/ψ φ(1020) → μ+μ− K+K− events. The measurement is based on a data sample corresponding
to an integrated luminosity of 96.4 fb−1, collected in proton-proton collisions at √s = 13 TeV in
2017–2018. To extract the values of φs and s, a time-dependent and flavor-tagged angular analysis
of the μ+μ−K+K− final state is performed. The analysis employs a dedicated tagging trigger and a
novel opposite-side muon flavor tagger based on machine learning techniques. The measurement yields
φs = −11±50 (stat)±10 (syst) mrad and s = 0.114±0.014 (stat)±0.007 (syst) ps−1, in agreement with
the standard model predictions. When combined with the previous CMS measurement at √s = 8 TeV,
the following values are obtained: φs = −21 ± 44 (stat) ± 10 (syst) mrad, s = 0.1032 ± 0.0095 (stat) ±
0.0048 (syst) ps−1, a significant improvement over the 8 TeV result
Observation of B 0 → ψ (2S)K S 0 π + π - and B s 0 → ψ (2S)K S 0 decays
No full textUsing 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 to B(B0s→ψ(2S)K0S)/B(B0→ψ(2S)K0S)=(3.33±0.69(stat)±0.11(syst)±0.34(fs/fd))×10−2 and B(B0→ψ(2S)K0Sπ+π−)/B(B0→ψ(2S)K0S)=0.480±0.013(stat)±0.032(syst), where the last uncertainty in the first ratio is related to the uncertainty in the ratio of production cross sections of B0s and B0 mesons, fs/fd
- …
