Evidence of Color Coherence Effects in W+jets Events from ppbar Collisions at sqrt(s) = 1.8 TeV

We report the results of a study of color coherence effects in ppbar collisions based on data collected by the D0 detector during the 1994-1995 run of the Fermilab Tevatron Collider, at a center of mass energy sqrt(s) = 1.8 TeV. Initial-to-final state color interference effects are studied by examining particle distribution patterns in events with a W boson and at least one jet. The data are compared to Monte Carlo simulations with different color coherence implementations and to an analytic modified-leading-logarithm perturbative calculation based on the local parton-hadron duality hypothesis.Comment: 13 pages, 6 figures. Submitted to Physics Letters

Hard Single Diffraction in pbarp Collisions at root-s = 630 and 1800 GeV

Using the D0 detector, we have studied events produced in proton-antiproton collisions that contain large forward regions with very little energy deposition (``rapidity gaps'') and concurrent jet production at center-of-mass energies of root-s = 630 and 1800 Gev. The fractions of forward and central jet events associated with such rapidity gaps are measured and compared to predictions from Monte Carlo models. For hard diffractive candidate events, we use the calorimeter to extract the fractional momentum loss of the scattered protons.Comment: 11 pages 4 figures. submitted to PR

Quality of Life of Widows Registered with Non-Government Organizations in Panipat City of Haryana, India

Background: Widowhood is an extremely stressful life event that not only creates psychological distress but also brings significant social changes to the surviving spouse. Widows face social neglect with reduced earning capacity and associated health problems.Objective: To assess the quality of life and existing known morbidities among widows registered with non-government organizations (NGOs) in Panipat city of Haryana, India.Materials and Methods: A cross-sectional study was conducted among 305 widows selected by purposive sampling in two registered non-governmental organizations (NGOs) in Panipat city of Haryana over a period of 5 months. Data was collected using World Health Organization Quality of Life (WHOQOL-BREF) questionnaire after taking written informed consent. Chi-square test was used to find association between two qualitative variables. P-value less than 0.05 was considered significant.Results: Mean age of widows was 52.04±15.08 years. Majority were Hindus (89.5%) and in the age group 50-70 years (46%). 150 (49.20%) complained of health-related problems at the time of interview, out of which most common reported complaints were respiratory illnesses (37%) followed by fever (27%), body aches (26%), visual problems (19%), gastro-intestinal problems (15%), injuries (13%), hearing problem (12%) and dental problem (7%). Environmental QOL of study subjects was lowest and physical QOL was highest among widows.Conclusion: Promotion of comprehensive healthcare services along with addressing social and environmental aspect for widows is important to improve QOL

Intralesional steroids and endoscopic dilation for anastomotic strictures after esophagectomy: systematic review and meta-analysis

Contains fulltext : 225266.pdf (Publisher’s version ) (Closed access)BACKGROUND:  Post-esophagectomy anastomotic strictures are difficult to treat. The impact of adding local steroid injection to endoscopic dilation for the treatment of post-esophagectomy anastomotic strictures is unclear. We conducted a systematic review and meta-analysis to assess the efficacy of performing steroid injection in addition to dilation. METHODS:  A search was conducted in MEDLINE, Cochrane Library, EMBASE, and Web of Science from inception to January 2019. Randomized controlled trials (RCTs) comparing the efficacy of endoscopic dilation plus either local steroid injection (steroid group) or saline injection (placebo group) were included in the analysis. RESULTS:  Three RCTs were eligible for the final analysis: 72 patients (mean age 61.3 years, 74 % male) in the steroid group and 72 patients (mean age 59.6 years, 71 % male) in the placebo group. The mean number of dilations required to resolve the stricture was significantly lower in the steroid group compared with the placebo group, with a mean weighted difference of -1.62 (95 % confidence interval [CI] -2.73 to -0.50; P = 0.004). After 6 months of follow-up, there was a trend toward more patients in the steroid group remaining dysphagia free compared with the placebo group, with a pooled odds ratio of 2.36 (95 %CI 0.94 to 5.91; P = 0.07, I2  = 24 %). CONCLUSION:  This meta-analysis showed that the addition of local steroid injection at the time of dilation for benign anastomotic strictures led to a significant decrease in the number of procedures required to resolve the stricture and may well reduce dysphagia symptoms during follow-up

The evaluation of IS investment returns: the RFI case

Today CIOs and IS departments in general are struggling to find a framework to evaluate the performance and the return of their IS investments. Notwithstanding a long-term research tradition on the topic of the business value impact of IS, so far the identification of the returns of the investments of IS is still an open issue. Even though a consistent body of literature has examined the problem over a time frame of more than 20 years, the IS business value research has produced so far a plethora of theoretical contributions with few practical applications. Starting from the assumption that real-world experiences differ from theoretical explications, and with the intent to contribute in the IS business value research field bringing evidences and witnesses from the reality, this paper presents a case of an IS Performance Management System used to assess the value delivered by IT in RFI (Rete Ferroviaria Italiana), the manager of the Italian railroad infrastructure

Higgs Boson Studies at the Tevatron

We combine searches by the CDF and D0 Collaborations for the standard model Higgs boson with mass in the range 90--200 GeV$/c^2$ produced in the gluon-gluon fusion, $WH$, $ZH$, $t{\bar{t}}H$, and vector boson fusion processes, and decaying in the $H\rightarrow b{\bar{b}}$, $H\rightarrow W^+W^-$, $H\rightarrow ZZ$, $H\rightarrow\tau^+\tau^-$, and $H\rightarrow \gamma\gamma$ modes. The data correspond to integrated luminosities of up to 10 fb$^{-1}$ and were collected at the Fermilab Tevatron in $p{\bar{p}}$ collisions at $\sqrt{s}=1.96$ TeV. The searches are also interpreted in the context of fermiophobic and fourth generation models. We observe a significant excess of events in the mass range between 115 and 140 GeV/$c^2$. The local significance corresponds to 3.0 standard deviations at $m_H=125$ GeV/$c^2$, consistent with the mass of the Higgs boson observed at the LHC, and we expect a local significance of 1.9 standard deviations. We separately combine searches for $H \to b\bar{b}$, $H \to W^+W^-$, $H\rightarrow\tau^+\tau^-$, and $H\rightarrow\gamma\gamma$. The observed signal strengths in all channels are consistent with the presence of a standard model Higgs boson with a mass of 125 GeV/$c^2$