Widespread presentation and spontaneous regression of porokeratotic eccrine ostial and dermal duct nevus

Porokeratotic eccrine ostial and dermal duct nevus (PEODDN) is an uncommon hamartomatous growth with disordered keratinization. The lesions typically appear on the limbs, often at birth or in early childhood, as linearly distributed papules and plaques. We report 4 cases of PEODDN, 2 of which showed significant spontaneous regression

On the Dalitz Plot Approach in Non-leptonic Charm Meson Decays

We claim that the non-resonant contribution to non-leptonic charm meson decays may not be constant in the phase space of the reaction. We argue that this can be relevant for any weak reaction. We discuss in detail the decay $D^+ \to K^- \pi^+ \pi^+$.Comment: Version accepted for publication in Physical Review Letters. 9 pages, Latex, including 2 figure

Sarcoid-like reaction in a patient recovering from coronavirus disease 19 pneumonia

As coronavirus disease 2019 (COVID-19) cases continue to increase, so do the reported extrapulmonary manifestations of this disease. To date, described dermatologic manifestations of COVID-19 include pernio-like acral nodules, dengue fever–like petechiae, vesiculobullous eruptions, pityriasis rosea and viral-like exanthems, retiform purpura, and livedo reticularis.1 We describe a patient with new-onset, biopsy confirmed sarcoid-like reaction in the setting of COVID-19 pneumonia and postulate a role for this immunologic reaction in hastening disease recovery

Systematics of Heavy Quark Production at HERA

We discuss heavy quark and quarkonium production in various kinematic regions at the HERA ep collider. In contrast to fixed target experiments, collider kinematics allows the possibility of detailed measurements of particle production in the proton fragmentation region. One thus can study parton correlations in the proton Fock states materialized by the virtual photon probe. We discuss various configurations of inelastic electron-proton scattering, including peripheral, diffractive, and deep inelastic processes. In particular, we show that intrinsic heavy quark Fock states can be identified by the observation of quarkonium production at large $x_F$ and a low mean transverse momentum which is insensitive to the virtuality $Q^2$ of the photon.Comment: 17 pages, postscript. To obtain a copy of this paper send e-mail to [email protected]

Study of the Cabibbo-suppressed decay modes D0-->Pi-pi+ and D0-->K-K+

Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement for the branching ratios of the Cabibbo-suppressed decay modes D0-->Pi-Pi+ and D0-->K-K+. We measured: Gamma(D0-->K-K+)/Gamma(D0-->Pi-Pi+) = 2.81 +/- 0.10(stat) +/- 0.06(syst), Gamma(D0-->K-K+)/Gamma(D0-->K-Pi+) = 0.0993 +/- 0.0014(stat) +/- 0.0014(syst), and Gamma(D0-->Pi-Pi+)/Gamma(D0-->K-Pi+) = 0.0353 +/- 0.0012 (stat) +/- 0.0006(syst). These values have been combined with other experimental data to extract the ratios of isospin amplitudes and the phase shifts for the D-->KK and D-->PiPi decay channels.Comment: 12 pages, 1 Figure, accepted for publication in Phys.Lett.

Search for CP Violation in the decays D+ -> K_S pi+ and D+ -> K_S K+

A high statistics sample of photo-produced charm from the FOCUS(E831) experiment at Fermilab has been used to search for direct CP violation in the decays D+->K_S pi+ and D+ -> K_S K+. We have measured the following asymmetry parameters relative to D+->K-pi+pi+: A_CP(K_S pi+) = (-1.6 +/- 1.5 +/- 0.9)%, A_CP(K_S K+) = (+6.9 +/- 6.0 +/- 1.5)% and A_CP(K_S K+) = (+7.1 +/- 6.1 +/- 1.2)% relative to D+->K_S pi+. The first errors quoted are statistical and the second are systematic. We also measure the relative branching ratios: \Gamma(D+->\bar{K0}pi+)/\Gamma(D+->K-pi+pi+) = (30.60 +/- 0.46 +/- 0.32)%, \Gamma(D+->\bar{K0}K+)/\Gamma(D+->K-pi+pi+) = (6.04 +/- 0.35 +/- 0.30)% and \Gamma(D+->\bar{K0}K+)/\Gamma(D+->\bar{K0}pi+) = (19.96 +/- 1.19 +/- 0.96)%.Comment: 4 pages, 3 figure

The Vehicle, Spring 1993

Table of Contents The Shape of Things to Come.Peter F. Essigpage 6 SaxophoneWalt Howardpage 6 Gravity BedSue Songerpage 7 UntitledJennifer Gutowskipage 8 uncertaintyWalt Howardpage 9 Ruth Ann, et. al.Susan Eisenhourpage 9 Failed IndustryScott Langenpage 10 UntitledKaren Wisspage 10 wanted:Walt Howardpage 10 Dida; 1978Diana Matijaspage 11 UntitledJennifer Gutowskipage 12 The Lesson in NovemberSue Songerpage 13 Coal MinerJames P. Tangpage 16 Christmas CrueltySue Songerpage 17 Astral ProjectionSusan Eisenhourpage 18 UntitledBen Hausmannpage 19 Into Zagreb\u27s Evening*Diana Matjaspage 20 UntitledJennifer Gutowskipage 22 The AnniversaryJennifer Moropage 23 NudeDan Trutterpage 24 death for saleWalt Howardpage 24 JudgedKevin St. Angelpage 25 Nature\u27s RefugeeScott Langenpage 25 Arrowhead Hunting at TippecanoeJennifer Moropage 26 UntitledKimberly Foxpage 27 TAINTED LOVESarah C. Patiencepage 28 cemeteryWalt Howardpage 28 Cow GameSusan Eisenhourpage 29 UntitledJennifer Gutowskipage 31 ReflectionsPeter F. Essigpage 32 Destination U.S.A.Dan Trutterpage 33 UntitledMario Letopage 33 Authors\u27 Pagepage 34https://thekeep.eiu.edu/vehicle/1061/thumbnail.jp

Search for Λc+→pK+π−\Lambda_c^+ \to p K^+ \pi^- and Ds+→K+K+π−D_s^+ \to K^+ K^+ \pi^- Using Genetic Programming Event Selection

We apply a genetic programming technique to search for the double Cabibbo suppressed decays $\Lambda_c^+ \to p K^+ \pi^-$ and $D_s^+ \to K^+ K^+ \pi^-$. We normalize these decays to their Cabibbo favored partners and find $\text{BR}($\Lambda_c^+ \to p K^+ \pi^-$)/\text{BR}($\Lambda_c^+ \to p K^- \pi^+$) = (0.05 \pm 0.26 \pm 0.02)$ and $\text{BR}($D_s^+ \to K^+ K^+ \pi^-$)/\text{BR}($D_s^+ \to K^+ K^- \pi^+$) = (0.52\pm 0.17\pm 0.11)$ where the first errors are statistical and the second are systematic. Expressed as 90% confidence levels (CL), we find $< 0.46$ and $< 0.78$ respectively. This is the first successful use of genetic programming in a high energy physics data analysis.Comment: 10 page

A High Statistics Measurement of the Lambdac+ Lifetime

A high statistics measurement of the Lambdac+ lifetime from the Fermilab fixed-target FOCUS photoproduction experiment is presented. We describe the analysis technique with particular attention to the determination of the systematic uncertainty. The measured value of 204.6 +/- 3.4 (stat.) +/- 2.5 (syst.) fs from 8034 +/- 122 Lambdac -> pKpi decays represents a significant improvement over the present world average.Comment: Submitted to Physical Review Letter

A Measurement of the Ds+ Lifetime

A high statistics measurement of the Ds+ lifetime from the Fermilab fixed-target FOCUS photoproduction experiment is presented. We describe the analysis of the two decay modes, Ds+ -> phi(1020)pi+ and Ds+ -> \bar{K}*(892)0K+, used for the measurement. The measured lifetime is 507.4 +/- 5.5 (stat.) +/- 5.1 (syst.) fs using 8961 +/- 105 Ds+ -> phi(1020)pi+ and 4680 +/- 90 Ds+ -> \bar{K}*(892)0K+ decays. This is a significant improvement over the present world average.Comment: 5 pages, 3 figures, 2 tables, submitted to PR