54 research outputs found

    First measurement of the |t|-dependence of coherent J/ψ photonuclear production

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    The first measurement of the cross section for coherent J/ψ photoproduction as a function of |t|, the square of the momentum transferred between the incoming and outgoing target nucleus, is presented. The data were measured with the ALICE detector in ultra-peripheral Pb–Pb collisions at a centre-of-mass energy per nucleon pair sNN=5.02TeV with the J/ψ produced in the central rapidity region |y|<0.8, which corresponds to the small Bjorken-x range (0.3−1.4)×10−3. The measured |t|-dependence is not described by computations based only on the Pb nuclear form factor, while the photonuclear cross section is better reproduced by models including shadowing according to the leading-twist approximation, or gluon-saturation effects from the impact-parameter dependent Balitsky–Kovchegov equation. These new results are therefore a valid tool to constrain the relevant model parameters and to investigate the transverse gluonic structure at very low Bjorken-x.publishedVersio

    Molecular mechanisms of cell death: recommendations of the Nomenclature Committee on Cell Death 2018.

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    Over the past decade, the Nomenclature Committee on Cell Death (NCCD) has formulated guidelines for the definition and interpretation of cell death from morphological, biochemical, and functional perspectives. Since the field continues to expand and novel mechanisms that orchestrate multiple cell death pathways are unveiled, we propose an updated classification of cell death subroutines focusing on mechanistic and essential (as opposed to correlative and dispensable) aspects of the process. As we provide molecularly oriented definitions of terms including intrinsic apoptosis, extrinsic apoptosis, mitochondrial permeability transition (MPT)-driven necrosis, necroptosis, ferroptosis, pyroptosis, parthanatos, entotic cell death, NETotic cell death, lysosome-dependent cell death, autophagy-dependent cell death, immunogenic cell death, cellular senescence, and mitotic catastrophe, we discuss the utility of neologisms that refer to highly specialized instances of these processes. The mission of the NCCD is to provide a widely accepted nomenclature on cell death in support of the continued development of the field

    ALICE Collaboration

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    Clinical implications of altered thyroid status in male testicular function

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    Shrine, south wall of the nave; The building dates from the first half of the thirteenth century. Viollet-le-Duc studied the structure of Notre-Dame de Dijon. The tall, monolithic and incredibly thin colonettes which support the apse vaults he describes as "splender pins, as strong as if they were of cast iron, thanks to the quality of the stone employed". In 1183-1187 Hugh III granted free status to the inhabitants. The Gothic parish church of Notre-Dame (1220-1250), with a deep narthex, a façade with superimposed galleries and a lantern-tower, became the centre of municipal life; the city clock was installed there in 1386 (Dijon had no town hall before 1500). Source: Grove Art Online; http://www.oxfordartonline.com/ (accessed 7/16/2008

    Multiplicity dependence of

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    This paper presents the measurements of π±\pi ^{\pm }, K±\mathrm {K}^{\pm }, p\text {p} and p\overline{\mathrm{p}} transverse momentum (pTp_{\text {T}}) spectra as a function of charged-particle multiplicity density in proton–proton (pp) collisions at s = 13 TeV\sqrt{s}\ =\ 13\ \text {TeV} with the ALICE detector at the LHC. Such study allows us to isolate the center-of-mass energy dependence of light-flavour particle production. The measurements reported here cover a pTp_{\text {T}} range from 0.1 to 20 GeV/c\text {GeV}/c and are done in the rapidity interval y<0.5|y|<0.5. The pTp_{\text {T}}-differential particle ratios exhibit an evolution with multiplicity, similar to that observed in pp collisions at s = 7 TeV\sqrt{s}\ =\ 7\ \text {TeV}, which is qualitatively described by some of the hydrodynamical and pQCD-inspired models discussed in this paper. Furthermore, the pTp_{\text {T}}-integrated hadron-to-pion yield ratios measured in pp collisions at two different center-of-mass energies are consistent when compared at similar multiplicities. This also extends to strange and multi-strange hadrons, suggesting that, at LHC energies, particle hadrochemistry scales with particle multiplicity the same way under different collision energies and colliding systems
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