Density dependence of the momentum distributions in liquid para-hydrogen

J. Dawidowski,1,* F. J. Bermejo,2,† M. L. Ristig,3 C. Cabrillo,4 and S. M. Bennington5 1Consejo Nacional de Investigaciones Científicas y Técnicas, Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica, Universidad Nacional de Cuyo, (8400) Bariloche, Argentina 2C.S.I.C., Department of Electricity and Electronics, University of the Basque Country, P.O. Box 644, E-48080 Bilbao, Spain 3Universität zu Köln, Institut für Theoretische Physik, 50937 Köln, Germany 4Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Cientificas, Serrano 123 E-28006 Madrid, Spain 5Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, United Kingdom Received 26 January 2006; revised manuscript received 6 March 2006; published 21 April 2006