Search for lepton flavor violating decays of a heavy neutral particle in p-pbar collisions at root(s)=1.8 TeV

We report on a search for a high mass, narrow width particle that decays directly to e+mu, e+tau, or mu+tau. We use approximately 110 pb^-1 of data collected with the Collider Detector at Fermilab from 1992 to 1995. No evidence of lepton flavor violating decays is found. Limits are set on the production and decay of sneutrinos with R-parity violating interactions.Comment: Figure 2 fixed. Reference 4 fixed. Minor changes to tex

Measurement of Resonance Parameters of Orbitally Excited Narrow B^0 Mesons

We report a measurement of resonance parameters of the orbitally excited (L=1) narrow B^0 mesons in decays to B^{(*)+}\pi^- using 1.7/fb of data collected by the CDF II detector at the Fermilab Tevatron. The mass and width of the B^{*0}_2 state are measured to be m(B^{*0}_2) = 5740.2^{+1.7}_{-1.8}(stat.) ^{+0.9}_{-0.8}(syst.) MeV/c^2 and \Gamma(B^{*0}_2) = 22.7^{+3.8}_{-3.2}(stat.) ^{+3.2}_{-10.2}(syst.) MeV/c^2. The mass difference between the B^{*0}_2 and B^0_1 states is measured to be 14.9^{+2.2}_{-2.5}(stat.) ^{+1.2}_{-1.4}(syst.) MeV/c^2, resulting in a B^0_1 mass of 5725.3^{+1.6}_{-2.2}(stat.) ^{+1.4}_{-1.5}(syst.) MeV/c^2. This is currently the most precise measurement of the masses of these states and the first measurement of the B^{*0}_2 width.Comment: 7 pages, 1 figure, 1 table. Submitted to Phys.Rev.Let

Measurement of the fraction of t-tbar production via gluon-gluon fusion in p-pbar collisions at sqrt(s)=1.96 TeV

We present a measurement of the ratio of t-tbar production cross section via gluon-gluon fusion to the total t-tbar production cross section in p-pbar collisions at sqrt{s}=1.96 TeV at the Tevatron. Using a data sample with an integrated luminosity of 955/pb recorded by the CDF II detector at Fermilab, we select events based on the t-tbar decay to lepton+jets. Using an artificial neural network technique we discriminate between t-tbar events produced via q-qbar annihilation and gluon-gluon fusion, and find Cf=(gg->ttbar)/(pp->ttbar)<0.33 at the 68% confidence level. This result is combined with a previous measurement to obtain the most precise measurement of this quantity, Cf=0.07+0.15-0.07.Comment: submitted to Phys. Rev.

Effect of Anisotropy on the Localization in a Bifractal System

Bifractal is a highly anisotropic structure where planar fractals are stacked to form a 3-dimensional lattice. The localization lengths along fractal structure for the Anderson model defined on a bifractal are calculated. The critical disorder and the critical exponent of the localization lengths are obtained from the finite size scaling behavior. The numerical results are in a good agreement with previous results which have been obtained from the localization lengths along the perpendicular direction. This suggests that the anisotropy of the embedding lattice structure is irrelevant to the critical properties of the localization.Comment: 3 pages, source TeX file and 3 epsi figures. submitted to PR

Ground State Entropy of Potts Antiferromagnets: Bounds, Series, and Monte Carlo Measurements

We report several results concerning $W(\Lambda,q)=\exp(S_0/k_B)$, the exponent of the ground state entropy of the Potts antiferromagnet on a lattice $\Lambda$. First, we improve our previous rigorous lower bound on $W(hc,q)$ for the honeycomb (hc) lattice and find that it is extremely accurate; it agrees to the first eleven terms with the large-$q$ series for $W(hc,q)$. Second, we investigate the heteropolygonal Archimedean $4 \cdot 8^2$ lattice, derive a rigorous lower bound, on $W(4 \cdot 8^2,q)$, and calculate the large-$q$ series for this function to $O(y^{12})$ where $y=1/(q-1)$. Remarkably, these agree exactly to all thirteen terms calculated. We also report Monte Carlo measurements, and find that these are very close to our lower bound and series. Third, we study the effect of non-nearest-neighbor couplings, focusing on the square lattice with next-nearest-neighbor bonds.Comment: 13 pages, Latex, to appear in Phys. Rev.

Vector Positronium States in QED3

The homogeneous Bethe-Salpeter equation is solved in the quenched ladder approximation for the vector positronium states of 4-component quantum electrodynamics in 2 space and 1 time dimensions. Fermion propagator input is from a Rainbow approximation Dyson-Schwinger solution, with a broad range of fermion masses considered. This work is an extension of earlier work on the scalar spectrum of the same model. The non-relativistic limit is also considered via the large fermion mass limit. Classification of states via their transformation properties under discrete parity transformations allows analogies to be drawn with the meson spectrum of QCD.Comment: 24 pages, 2 encapsulated postscript figure

Sarcopenic Obesity: Prevalence and Association With Metabolic Syndrome in the Korean Longitudinal Study on Health and Aging (KLoSHA)

OBJECTIVE - We investigated the prevalence of sarcopenic obesity (SO) and its relationship with metabolic syndrome in a community-based elderly cohort in Korea. RESEARCH DESIGN AND METHODS - In this study, 287 men and 278 women aged 65 or older were recruited. Sarcopenia was defined as the appendicular skeletal muscle mass (ASM) divided by height squared (Ht(2)) (kg/m(2)) or by weight (Wt) (%) of = 100 cm(2). RESULTS - The prevalence of SO was 16.7% in men and 5.7% in women with sarcopenia defined by ASM/Ht(2); however, it was 35.1% in men and 48.1% in women by ASM/Wt. Using ASM/Wt, the homeostasis model assessment of insulin resistance of subjects with SO was higher and they were at higher risk for metabolic syndrome (odds ratio [OR] 8.28 [95% Cl 4.45-15.40]) than the obese (5.51 [2.81-10.80]) or sarcopenic group (2.64 [1.08-6.44]). CONCLUSIONS - SO defined by ASM/Wt was more closely associated with metabolic syndrome than either sarcopenia or obesity alone.Lim S, 2010, OBESITY, V18, P826, DOI 10.1038/oby.2009.232Stephen WC, 2009, J NUTR HEALTH AGING, V13, P460, DOI 10.1007/s12603-009-0084-zZamboni M, 2008, NUTR METAB CARDIOVAS, V18, P388, DOI 10.1016/j.numecd.2007.10.002Schrager MA, 2007, J APPL PHYSIOL, V102, P919, DOI 10.1152/japplphysiol.00627.2006Newman AB, 2006, J GERONTOL A-BIOL, V61, P72Janssen I, 2006, J AM GERIATR SOC, V54, P56, DOI 10.1111/j.1532-5415.2005.00540.xNair KS, 2005, AM J CLIN NUTR, V81, P953Baumgartner RN, 2004, OBES RES, V12, P1995Zoico E, 2004, INT J OBESITY, V28, P234, DOI 10.1038/sj.ijo.0802552Matsuzawa Y, 2002, CIRC J, V66, P987Janssen I, 2002, J AM GERIATR SOC, V50, P889Cleeman JI, 2001, JAMA-J AM MED ASSOC, V285, P2486, DOI 10.1001/jama.285.19.2486Baumgartner RN, 2000, ANN NY ACAD SCI, V904, P437*WHO W PAC REG, 2000, AS PAC PERSP RED OBSBaumgartner RN, 1998, AM J EPIDEMIOL, V147, P755

Different resuscitation strategies and novel pharmacologic treatment with valproic acid in traumatic brain injury

Traumatic brain injury (TBI) is a leading cause of death in young adults, and effective treatment strategies have the potential to save many lives. TBI results in coagulopathy, endothelial dysfunction, inflammation, cell death, and impaired epigenetic homeostasis, ultimately leading to morbidity and/or mortality. Commonly used resuscitation fluids such as crystalloids or colloids have several disadvantages and might even be harmful when administered in large quantities. There is a need for next‐generation treatment strategies (especially in the prehospital setting) that minimize cellular damage, improve survival, and enhance neurological recovery. Pharmacologic treatment with histone deacetylase inhibitors, such as valproic acid, has shown promising results in animal studies of TBI and may therefore be an excellent example of next‐generation therapy. This review briefly describes traditional resuscitation strategies for TBI combined with hemorrhagic shock and describes preclinical studies on valproic acid as a new pharmacologic agent in the treatment of TBI. It finally discusses limitations and future directions on the use of histone deacetylase inhibitors for the treatment of TBI.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142545/1/jnr24125_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/142545/2/jnr24125.pd

The developmental state, speculative urbanisation and the politics of displacement in gentrifying Seoul

What does gentrification mean under speculative urbanisation led by a strong developmental state? This paper analyses the contemporary history of Seoul’s urban redevelopment, arguing that new-build gentrification is an endogenous process embedded in Korea’s highly speculative urban development processes from the 1980s. Property owners, construction firms and local/central governments coalesce, facilitating the extraction of exchange value by closing the rent gap. Displacement of poorer owner-occupiers and tenants was requisite for the success of speculative accumulation. Furthermore, the paper also contends that Korea’s speculative urbanisation under the strong developmental (and later (neo-)liberalising) state has rendered popular resistance to displacement ineffective despite its initial success in securing state concessions. Examining the experience of Seoul in times of condensed industrialisation and speculative urbanisation helps inform the existing literature on gentrification by resorting to non-Western empirics