b jet Identification in CMS

AbstractA large fraction of the CMS physics program relies on the identification (tagging) of jets containing the decay of a B hadron (b jets). The b jets can be discriminated from jets produced by the hadronization of light quarks based on characteristic properties of B hadrons, such as the long lifetime. An overview of the large variety of b-tagging algorithms and the measurement of their performance with data collected in 2011 and 2012 are presented in this paper. A special focus lies on new methods of b-tagging in jet substructure. Searches for new physics often focus on boosted final states characterized by particles with large transverse momenta, resulting in decay products of heavy particles tending to be collimated and reconstructed as a single jet, known as fat jet. In this case, the reconstruction of the fat jet substructure is necessary to identify the particle initiating the fat jet. The substructure reconstruction can significantly be improved by the identification of b jets

Coronary artery CTA. A case-based atlas

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Learning abdominal imaging

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Oto-Palato-Digital syndrome in four generations of a large family.

A new large family, affected by O-P-D syndrome is reported. Nine members in four consecutive generations have been studied. Computerized tomography study of spine and skull showed abnormalities to be confined to mesodermal derivates, while nervous structures were normal. Transmission pattern may be X-linked with intermediate expression in the female or autosomal dominant with sex limitation of expression

Radiology and histopathology of the bent limbs in campomelic dysplasia: implications in the aetiology of the disease and review of theories.

The study of the bent bones in a case of campomelic dysplasia and a review of the literature suggest a repair process at the site of angulation. A theory that can explain most of the features of the disease is presented; it supposes a damage of the cartilage model at the midshaft, followed by a fracture of the thin bone collar in the earlier stage of ossification of the diaphysis

Neonatal clavicle dislocation

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Chondrodystrophic dwarfism and multiple malformations in two sisters.

A genetic skeletal dysplasia with dwarfism, scoliosis and multiple skeletal defects was observed in two sisters. Only nine cases with similar features have been reported in the literature