ABSTRACT
The NA60 experiment at the CERN Super Proton Synchrotron has studied dimuon production in 158A GeV In-In collisions. The strong excess of pairs above the known sources found in the complete mass region 0.2
ABSTRACT
The NA60 experiment at the CERN SPS has studied low-mass dimuon production in 158A GeV In-In collisions. An excess of pairs above the known meson decays has been reported before. We now present precision results on the associated transverse momentum spectra. The slope parameter Teff extracted from the spectra rises with dimuon mass up to the rho, followed by a sudden decline above. While the initial rise is consistent with the expectations for radial flow of a hadronic decay source, the decline signals a transition to an emission source with much smaller flow. This may well represent the first direct evidence for thermal radiation of partonic origin in nuclear collisions.
ABSTRACT
The NA60 experiment studies muon pair production at the CERN Super Proton Synchrotron. In this Letter we report on a precision measurement of J/psi in In-In collisions. We have studied the J/psi centrality distribution, and we have compared it with the one expected if absorption in cold nuclear matter were the only active suppression mechanism. For collisions involving more than approximately 80 participant nucleons, we find that an extra suppression is present. This result is in qualitative agreement with previous Pb-Pb measurements by the NA50 experiment, but no theoretical explanation is presently able to coherently describe both results.
ABSTRACT
We report on a precision measurement of low-mass muon pairs in 158 AGeV indium-indium collisions at the CERN SPS. A significant excess of pairs is observed above the yield expected from neutral meson decays. The unprecedented sample size of 360,000 dimuons and the good mass resolution of about 2% allow us to isolate the excess by subtraction of the decay sources. The shape of the resulting mass spectrum is consistent with a dominant contribution from pi+pi- -->rho -->mu+mu- annihilation. The associated space-time averaged spectral function shows a strong broadening, but essentially no shift in mass. This may rule out theoretical models linking hadron masses directly to the chiral condensate.
Subject(s)
Respiratory Distress Syndrome, Newborn/therapy , Ventilators, Mechanical/adverse effects , Bronchopulmonary Sequestration/etiology , Hemoptysis/etiology , Humans , Hyaline Membrane Disease/therapy , Iatrogenic Disease , Infant, Newborn , Pneumonia/etiology , Pulmonary Atelectasis/etiologyABSTRACT
We report the case of a boy aged 9 1/2 years with hyperosmolar, nonketotic diabetic coma. He was not known to be diabetic prior to the onset of coma. Pathogenetic aspects of this rare manifestation of juvenile diabetes are discussed. It is dangerous to decrease osmolarity too rapidly during infusion of very hypotonic solutions. Treatment with continuous low-dose insulin infusion may cautiously be tried.
Subject(s)
Diabetes Mellitus, Type 1/complications , Diabetic Coma/drug therapy , Hyperglycemic Hyperosmolar Nonketotic Coma/drug therapy , Insulin/administration & dosage , Child , Humans , Male , Osmolar Concentration , Time FactorsABSTRACT
Successive manifestations of acute air leak phenomenona are reported in a ventilated premature infant with aspiration of amniotic fluid. The increasingly reported incidence of pulmonary interstitial emphysema is emphasized. After its first occurrence there is a serious need for careful clinical and radiological observation because of the great risk of further complications.
Subject(s)
Infant, Premature, Diseases/therapy , Respiration, Artificial/adverse effects , Amniotic Fluid , Humans , Infant, Newborn , Infant, Premature , Pneumopericardium/etiology , Pneumoperitoneum/etiology , Pneumothorax/etiology , Pulmonary Emphysema/etiologyABSTRACT
Report of a 10 year old girl, who demonstrated the following diseases independent from each other: Phenylketonuria, Rubinstein-Taybi syndrome, dysplasias of the skeleton, especially dysplasia of the vertebra and finally, left-sided shrinkes adrenal gland, which caused presumably an increased production of androgens with a premature pubarche.
Subject(s)
Abnormalities, Multiple/complications , Adrenal Gland Diseases/complications , Mucopolysaccharidosis IV/complications , Phenylketonurias/complications , Rubinstein-Taybi Syndrome/complications , Spinal Diseases/complications , Abnormalities, Multiple/diagnostic imaging , Child , Female , Foot/diagnostic imaging , Hand/diagnostic imaging , Humans , Radiography , Spine/diagnostic imaging , SyndromeABSTRACT
A case of intense grey-brown discoloration of the skin, serum and urine in a premature twin is reported when phototherapy was used to reduce hyperbilirubinemia. All features made the diagnosis of bronze-baby-syndrome most probable. We were able to detect an increased level of coproporphyrin in serum. The patient did not show any signs of a kernicterus. Possible speculations about the pathogenetic and prognostic value of elevated levels of coproporphyrins in newborn infants under treatment with phototherapy are discussed. In these cases we must be aware of possible neurotoxic effects, since increased concentrations of bilirubin breakdown products may not be excreted as well through the normal biliary passage as normally.
