| 1. |
- Schael, S, et al.
(författare)
-
Precision electroweak measurements on the Z resonance
- 2006
-
Ingår i: Physics Reports. - : Elsevier BV. - 0370-1573 .- 1873-6270. ; 427:5-6, s. 257-454
-
Forskningsöversikt (refereegranskat)abstract
- We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLID experiment using a polarised beam at SLC. The measurements include cross-sections, forward-backward asymmetries and polarised asymmetries. The mass and width of the Z boson, m(Z) and Gamma(Z), and its couplings to fermions, for example the p parameter and the effective electroweak mixing angle for leptons, are precisely measured: m(Z) = 91.1875 +/- 0.0021 GeV, Gamma(Z) = 2.4952 +/- 0.0023 GeV, rho(l) = 1.0050 +/- 0.0010, sin(2)theta(eff)(lept) = 0.23153 +/- 0.00016. The number of light neutrino species is determined to be 2.9840 +/- 0.0082, in agreement with the three observed generations of fundamental fermions. The results are compared to the predictions of the Standard Model (SM). At the Z-pole, electroweak radiative corrections beyond the running of the QED and QCD coupling constants are observed with a significance of five standard deviations, and in agreement with the Standard Model. Of the many Z-pole measurements, the forward-backward asymmetry in b-quark production shows the largest difference with respect to its SM expectation, at the level of 2.8 standard deviations. Through radiative corrections evaluated in the framework of the Standard Model, the Z-pole data are also used to predict the mass of the top quark, m(t) = 173(+10)(+13) GeV, and the mass of the W boson, m(W) = 80.363 +/- 0.032 GeV. These indirect constraints are compared to the direct measurements, providing a stringent test of the SM. Using in addition the direct measurements of m(t) and m(W), the mass of the as yet unobserved SM Higgs boson is predicted with a relative uncertainty of about 50% and found to be less than 285 GeV at 95% confidence level. (c) 2006 Elsevier B.V. All rights reserved.
|
|
| 2. |
- Kanai, M, et al.
(författare)
-
- 2023
-
swepub:Mat__t
|
|
| 3. |
|
|
| 4. |
|
|
| 5. |
|
|
| 6. |
|
|
| 7. |
|
|
| 8. |
- Pembe, Andrea Barnabas, 1966-
(författare)
-
Quality Assessment and Monitoring of Maternal Referrals in Rural Tanzania
- 2010
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- An efficient referral system is essential in providing access to emergency obstetric care at higher levels of care by supporting antenatal and delivery services in the primary level of care facilities (PLCF). The aim of this thesis was to assess community and health service factors affecting the quality of maternal referrals in rural Tanzania. Ten focus group discussions (FGDs) with health workers and community members were conducted to describe their perceptions on maternal referrals. Women (n=1118) were interviewed to determine awareness of obstetric danger signs and associated factors. Compliance with referral advice was analysed for 1538 women referred from PLCF. Counselling on danger signs and adherence to referral criteria was observed in 438 antenatal consultations. FGDs indicated that women had limited influence, especially on emergency referrals. The process of deciding to seek referral care considered the perception of seriousness and past experience of referral, access to transport, and the cost involved. Women had low awareness of danger signs of obstetric complications: higher years of schooling increased the likelihood of being aware of danger signs. Demographic risks accounted for 70% of referred women but less than half complied with the advice. Compliance was higher for historical obstetric risks, prenatal, natal, and postnatal complications groups. Few women were counselled on pregnancy danger signs and a significant number with ≥5 pregnancies and primigravidae <20 years were not informed of the risk factors. This thesis demonstrated a need for reviewing referral guidelines and an increase in supportive supervision for health workers counselling on obstetric danger signs to enhance acceptance of referrals advices. Women’s education should be given priority for increasing participation in decisions and becoming more aware of danger signs. Costs involved in maternal referrals can be relieved by improving family income, infrastructure, and alleviating the cost of referral through mobilising community transport and financial schemes.
|
|
| 9. |
- Teutschbein, Claudia, 1985-, et al.
(författare)
-
Drought hazards and stakeholder perception : Unraveling the interlinkages between drought severity, perceived impacts, preparedness, and management
- 2023
-
Ingår i: Ambio. - : Springer Nature. - 0044-7447 .- 1654-7209. ; 52:7, s. 1262-1281
-
Tidskriftsartikel (refereegranskat)abstract
- The future risk for droughts and water shortages calls for substantial efforts by authorities to adapt at local levels. Understanding their perception of drought hazards, risk and vulnerability can help to identify drivers of and barriers to drought risk planning and management in a changing climate at the local level. This paper presents a novel interdisciplinary drought case study in Sweden that integrates soft data from a nationwide survey among more than 100 local practitioners and hard data based on hydrological measurements to provide a holistic assessment of the links between drought severity and the perceived levels of drought severity, impacts, preparedness, and management for two consecutive drought events. The paper highlights challenges for drought risk planning and management in a changing climate at the local level and elaborates on how improved understanding of local practitioners to plan for climate change adaptation can be achieved.
|
|
| 10. |
|
|
