261 research outputs found
Hyvä tarkoitus, epämääräiset käsitteet : tarkkuutta kolonialismin ja vähemmistöjen tutkimukseen
Kenen historia? : raportti monipuolisen historiantutkimuksen, -opetuksen ja vuoropuhelun tilasta ja haasteista Suomessa / Helsinki : Historians without Borders in Finland, 2018
Kolonialismi-keskustelun häivytetyt ristiriidat ja liberaalidemokratian tulevaisuus
Viime aikoina Suomessa on virinnyt kiinnostava keskustelu kolonialismista ja useista siihen läheisesti liittyvistä käsitteistä
Uusimman ajan aateliseliitti
Arvosteltu teos: Aristocracy and the modern world / Ellis Wasson. Basingstoke : Palgrave Macmillan, 2006
Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions
At sufficiently high temperature and energy density, nuclear matter undergoes a transition to a phase in which quarks and gluons are not confined: the quark-gluon plasma (QGP)(1). Such an exotic state of strongly interacting quantum chromodynamics matter is produced in the laboratory in heavy nuclei high-energy collisions, where an enhanced production of strange hadrons is observed(2-6). Strangeness enhancement, originally proposed as a signature of QGP formation in nuclear collisions(7), is more pronounced for multi-strange baryons. Several effects typical of heavy-ion phenomenology have been observed in high-multiplicity proton-proton (pp) collisions(8,9), but the enhanced production of multi-strange particles has not been reported so far. Here we present the first observation of strangeness enhancement in high-multiplicity proton-proton collisions. We find that the integrated yields of strange and multi-strange particles, relative to pions, increases significantly with the event charged-particle multiplicity. The measurements are in remarkable agreement with the p-Pb collision results(10,11), indicating that the phenomenon is related to the final system created in the collision. In high-multiplicity events strangeness production reaches values similar to those observed in Pb-Pb collisions, where a QGP is formed.Peer reviewe
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