Showing papers by "A. M. Lopez published in 2004"
University of California, Davis1, CINVESTAV2, University of Colorado Boulder3, Fermilab4, Universidad de Guanajuato5, University of Illinois at Urbana–Champaign6, Indiana University7, Korea University8, Kyungpook National University9, University of Milan10, University of North Carolina at Chapel Hill11, University of Puerto Rico at Mayagüez12, University of South Carolina13, University of Tennessee14, Vanderbilt University15
TL;DR: Using data from the FOCUS experiment, the D+π− and D0π+ invariant mass distributions are analyzed to find evidence for broad structures over background in both the neutral and charged final state.
110 citations
University of California, Davis1, CINVESTAV2, University of Colorado Boulder3, Fermilab4, Universidad de Guanajuato5, University of Illinois at Urbana–Champaign6, Indiana University7, Korea University8, Kyungpook National University9, University of Milan10, University of North Carolina at Chapel Hill11, University of Puerto Rico at Mayagüez12, University of South Carolina13, University of Tennessee14, Vanderbilt University15
TL;DR: In this paper, the K-matrix formalism is applied to the Dalitz plot analysis of D + s and D + to π + π − π+ for the first time, and the results are discussed along with their possible implications for the controversial σ meson.
64 citations
University of California, Davis1, CINVESTAV2, University of Colorado Boulder3, Fermilab4, University of Illinois at Urbana–Champaign5, Indiana University6, Korea University7, Kyungpook National University8, University of Milan9, University of North Carolina at Chapel Hill10, University of Puerto Rico at Mayagüez11, University of South Carolina12, University of Tennessee13, Vanderbilt University14, University of Wisconsin-Madison15
11 Jan 2004-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this article, a silicon microstrip detector interleaved with segments of a beryllium oxide target was used in the FOCUS photoproduction experiment at Fermilab.
Abstract: We describe a silicon microstrip detector interleaved with segments of a beryllium oxide target which was used in the FOCUS photoproduction experiment at Fermilab. The detector was designed to improve the vertex resolution and to enhance the reconstruction efficiency of short-lived charm particles.
34 citations
University of Bologna1, University of Colorado Boulder2, Fermilab3, University of Illinois at Urbana–Champaign4, Northwestern University5, University of Notre Dame6, University of Puerto Rico at Mayagüez7, University of California, Davis8, University of South Carolina9, Vanderbilt University10, University of North Carolina at Asheville11, University of Tennessee12, Korea University13
TL;DR: In this paper, the E687 data were refitted, a mechanism was proposed to explain why this resonance appears as a dip, and possible interpretations were discussed, and the Fermilab experiment E687 in diffractive photoproduction of 3 π+3 π − was examined.
24 citations
University of California, Davis1, CINVESTAV2, University of Colorado Boulder3, Fermilab4, Universidad de Guanajuato5, University of Illinois at Urbana–Champaign6, Indiana University7, Korea University8, Kyungpook National University9, University of Milan10, University of North Carolina at Chapel Hill11, University of Puerto Rico at Mayagüez12, University of South Carolina13, University of Tennessee14, Vanderbilt University15, University of Wisconsin-Madison16
TL;DR: In this article, Hagiwara et al. used a high statistics sample of photo-produced charm particles from the FOCUS experiment at Fermilab, and reported the measurement of the ratio of semileptonic rates Γ ( D + → K π μ + ν μ ) / Γ( D+ → K ¯ 0 μ+ νμ ) = 0.625 ± 0.065.
15 citations
University of California, Davis1, CINVESTAV2, University of Colorado Boulder3, Fermilab4, Universidad de Guanajuato5, University of Illinois at Urbana–Champaign6, Indiana University7, Korea University8, Kyungpook National University9, University of Milan10, University of North Carolina at Chapel Hill11, University of Puerto Rico at Mayagüez12, University of South Carolina13, University of Tennessee14, Vanderbilt University15
TL;DR: In this article, the authors used a large sample of D s + → φμ + ν decays collected by the FOCUS photoproduction experiment at Fermilab.
10 citations
University of California, Davis1, CINVESTAV2, University of Colorado Boulder3, Fermilab4, Universidad de Guanajuato5, University of Illinois at Urbana–Champaign6, Indiana University7, Korea University8, Kyungpook National University9, University of Milan10, University of North Carolina at Chapel Hill11, University of Puerto Rico at Mayagüez12, University of South Carolina13, University of Tennessee14, Vanderbilt University15, University of Wisconsin-Madison16
TL;DR: In this article, the doubly and singly Cabibbo suppressed decays D + and D s + → K + π+ π − were studied using data collected by FOCUS at Fermilab.
9 citations
University of California, Davis1, CINVESTAV2, University of Colorado Boulder3, Fermilab4, Universidad de Guanajuato5, University of Illinois at Urbana–Champaign6, Indiana University7, Korea University8, Kyungpook National University9, University of Milan10, University of North Carolina at Chapel Hill11, University of Puerto Rico at Mayagüez12, University of South Carolina13, University of Tennessee14, Vanderbilt University15, University of Wisconsin-Madison16
TL;DR: In this paper, the authors reported the discovery of the decay modes of the FOCUS experiment at Fermilab, and measured the relative branching ratios of these decay modes.
3 citations
University of California, Davis1, CINVESTAV2, University of Colorado Boulder3, Fermilab4, Universidad de Guanajuato5, University of Illinois at Urbana–Champaign6, Indiana University7, Korea University8, Kyungpook National University9, University of Milan10, University of North Carolina at Chapel Hill11, University of Puerto Rico at Mayagüez12, University of South Carolina13, University of Tennessee14, Vanderbilt University15
TL;DR: In this paper, the decay of D0 and D+s mesons into five-body final states including a KS0 and report the discovery of the decay mode Ds+→KS0KS0π+π +π−.
3 citations
University of California, Davis1, CINVESTAV2, University of Colorado Boulder3, Fermilab4, Universidad de Guanajuato5, University of Illinois at Urbana–Champaign6, Indiana University7, Korea University8, Kyungpook National University9, University of Milan10, University of North Carolina at Chapel Hill11, University of Puerto Rico at Mayagüez12, University of South Carolina13, University of Tennessee14, Vanderbilt University15
TL;DR: In this article, the authors reported measurements of the charm-anticharm production asymmetries for Λ c +, Σ c ++, Σc 0, ǫ c 0, Ω c 0, Ω C 0 ∗, à c 0∗, and à C 0, and Ωc 0 ∞ baryons from Fermilab photoproduction experiment FOCUS (E831).
1 citations
TL;DR: The heterozygosity for the mutation found in skin fibroblasts proves that the intragenic RB1 deletion probably took place in the definitive hematopoietic lineage of the patient, and suggests that the white blood cells of the proband could be useful in the investigation of the role of complementary RBI family proteins in the control of the cell cycle.
Abstract: We report the presence of a hemizygous inactivating germ-line RB1 mutation (a recurrent g.78250CT transition, resulting in a stop codon in exon 17) in peripheral blood DNA from a patient with hereditary bilateral retinoblastoma. Hemizygosity was established by sequencing that showed no traces of the wild-type C nucleotide and by quantitative real-time PCR, which showed loss of one copy of exon 17. Genotyping of the RB1 locus with several polymorphic markers delineated a maximal deletion region between g.76875 and g.99426, including exons 15–17 and a large piece (21 kb) of intron 17. The heterozygosity for the mutation found in skin fibroblasts proves that the intragenic RB1 deletion probably took place in the definitive hematopoietic lineage of the patient. The presence of a null Rb−/− genotype in the hematopoietic cell lineage suggests that the white blood cells of the proband could be useful in the investigation of the role of complementary RBI family proteins in the control of the cell cycle. © 2004 Wiley-Liss, Inc.