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Frankfurt ist Knotenpunkt globaler Güter-, Finanz-, Wissens- und Migrationsbewegungen. Die Arbeitsmärkte und -verhältnisse in der Stadt sind Ausdruck einer globalen Verwobenheit, die diskursiv oft mit dem Label der ›Global City‹ markiert wird. In einer Zeit, in der Arbeit als Feld der Produktion und Reproduktion weitreichenden Transformationsprozessen ausgesetzt ist, in der das sogenannte Normalarbeitsverhältnis zunehmend erodiert, in der Arbeitsverhältnisse oft räumlich, sozial und zeitlich entgrenzt und flexibilisiert sind und in der gut bezahlte Jobs und schlecht- bezahlte, teils prekarisierte Formen der Beschäftigung koexistieren – zum Teil im gleichen Betrieb –, muss es Aufgabe wirtschaftsgeographischer Forschung sein, die Lebenswelten von Arbeitenden in einer räumlichen Perspektive zu beleuchten. Genau dies will der vorliegende Band tun. Er versammelt engagierte, theoretisch gesättigte und empirisch geerdete Beiträge von Studierenden des Instituts für Humangeographie, die einen kritischen Blick auf die Formen, Praktiken, Beziehungen und gesellschaftliche Einbettung von Arbeit in unterschiedlichen Branchen in der ›Global City‹ Frankfurt werfen.
Wohnungs‐ und Büroimmobilienmärkte unter Stress: Deregulierung, Privatisierung und Ökonomisierung
(2009)
Von A bis Å. (Fast) alles über die Frankfurter Skandinavistik. Ausgabe 4 ; Sommersemester 2022
(2022)
Von A bis Å. (Fast) alles über die Frankfurter Skandinavistik. Ausgabe 6 ; Sommersemester 2023
(2023)
Von A bis Å. (Fast) alles über die Frankfurter Skandinavistik. Ausgabe 5 ; Wintersemester 2022/23
(2022)
Von A bis Å. (Fast) alles über die Frankfurter Skandinavistik. Ausgabe 2 ; Sommersemester 2021
(2021)
Von A bis Å. (Fast) alles über die Frankfurter Skandinavistik. Ausgabe 3 ; Wintersemester 2021
(2021)
Von A bis Å. (Fast) alles über die Frankfurter Skandinavistik. Ausgabe 1 ; Wintersemester 2020/21
(2020)
Forschung Frankfurt : das Wissenschaftsmagazin der Goethe-Universität. 1.2023 ; Fremde Welten
(2023)
ISOE-Newsletter Nr. 3/2023
(2023)
Alternativen zum privaten Auto – wie ein Umstieg gelingt +++ Insect Embassy – eine diplomatische Vertretung für Insekten in der Stadt +++ Dokuabend Rhein-Main: Frankfurt – eine Stadt für Insekten? +++ Wie die Grundwasserqualität geschützt werden kann +++ tdAcademy startet in die zweite Forschungsphase +++ Mit RNAi gegen gefährliche Stechmücken – neue technologische Entwicklung aus Hessen kann vor der Verbreitung tropischer Krankheiten schützen +++ Gründungsfeier in Berlin der Fachgesellschaft für transdisziplinäre und partizipative Forschung +++ „Das ist für mich so Pendelfreizeit“ – Interviewstudie im Forschungsprojekt PendelLabor erschienen +++ Das ISOE in den Medien +++ Aktuelle Beiträge im ISOE-Blog +++ Termine +++ Publikationen
The azimuthal (Δφ) correlation distributions between heavy-flavor decay electrons and associated charged particles are measured in pp and p−Pb collisions at sNN−−−√=5.02 TeV. Results are reported for electrons with transverse momentum 4<pT<16 GeV/c and pseudorapidity |η|<0.6. The associated charged particles are selected with transverse momentum 1<pT<7 GeV/c, and relative pseudorapidity separation with the leading electron |Δη|<1. The correlation measurements are performed to study and characterize the fragmentation and hadronization of heavy quarks. The correlation structures are fitted with a constant and two von Mises functions to obtain the baseline and the near- and away-side peaks, respectively. The results from p−Pb collisions are compared with those from pp collisions to study the effects of cold nuclear matter. In the measured trigger electron and associated particle kinematic regions, the two collision systems give consistent results. The Δφ distribution and the peak observables in pp and p−Pb collisions are compared with calculations from various Monte Carlo event generators.
The first measurement of the e+e− pair production at low lepton pair transverse momentum (pT,ee) and low invariant mass (mee) in non-central Pb−Pb collisions at sNN−−−√=5.02 TeV at the LHC is presented. The dielectron production is studied with the ALICE detector at midrapidity (|ηe|<0.8) as a function of invariant mass (0.4≤mee<2.7 GeV/c2) in the 50−70% and 70−90% centrality classes for pT,ee<0.1 GeV/c, and as a function of pT,ee in three mee intervals in the most peripheral Pb−Pb collisions. Below a pT,ee of 0.1 GeV/c, a clear excess of e+e− pairs is found compared to the expectations from known hadronic sources and predictions of thermal radiation from the medium. The mee excess spectra are reproduced, within uncertainties, by different predictions of the photon−photon production of dielectrons, where the photons originate from the extremely strong electromagnetic fields generated by the highly Lorentz-contracted Pb nuclei. Lowest-order quantum electrodynamic (QED) calculations, as well as a model that takes into account the impact-parameter dependence of the average transverse momentum of the photons, also provide a good description of the pT,ee spectra. The measured ⟨p2T,ee⟩−−−−−√ of the excess pT,ee spectrum in peripheral Pb−Pb collisions is found to be comparable to the values observed previously at RHIC in a similar phase-space region.
Angesichts des ungebremsten Zulaufs von IS-Rekruten aus Deutschland und Europa einerseits und den deutlichen Anzeichen für eine wachsende Islamophobie hierzulande andererseits, ist unser Wissen über das Phänomen des Islamischen Staats zu plakativ und zu wenig fundiert. Dieses Buch beleuchtet, aufbauend auf einem im Frühjahr 2015 veröffentlichten Blogforum des Sicherheitspolitik-Blogs, in gut verdaulichen Beiträgen blinde Flecken im öffentlichen, politischen und wissenschaftlichen Diskurs, vertieft bereits bekannte Aspekte und bricht vermeintliche Gewissheiten auf. Ziel ist, den Diskurs über den Islamischen Staat konstruktiv zu prägen. Dieser Aufgabe haben sich Expertinnen und Experten unterschiedlicher Disziplinen der Wissenschaft, öffentlichen und privaten Sicherheitsinstitutionen, Entwicklungszusammenarbeit und De-Radikalisierungspraxis verschrieben.
Das dritte E-Book des Sicherheitspolitik-Blogs ist nun erhältlich. Es basiert auf dem Blogfokus „Salafismus in Deutschland – Herausforderungen für Politik und Gesellschaft“ und wurde von Janusz Biene und Julian Junk herausgegeben. Es ist als Druckversion zu kaufen oder kann kostenlos als PDF heruntergeladen werden.
Radikalisierung als individuelles und gesellschaftliches Phänomen Extreme politische Ansichten haben Konjunktur. Auf beiden Seiten des politischen Spektrums, aber auch in religiösen Milieus radikalisieren sich Positionen und stellen demokratische Werte und Institutionen infrage. Mit diesen Phänomenen hat sich das vom Bundesministerium für Bildung und Forschung geförderte Projekt "Gesellschaft Extrem. Radikalisierung und Deradikalisierung in Deutschland" befasst. ...
Kongreß für Laboratoriumsmedizin, Frankfurt 7. bis 9. 5. 1991. Abstracts der Posterpräsentation
(1991)
The measurement of the production of charm jets, identified by the presence of a D0 meson in the jet constituents, is presented in proton-proton collisions at centre-of-mass energies of s√ = 5.02 and 13 TeV with the ALICE detector at the CERN LHC. The D0 mesons were reconstructed from their hadronic decay D0→K−π+ and the respective charge conjugate. Jets were reconstructed from D0-meson candidates and charged particles using the anti-kT algorithm, in the jet transverse momentum range 5<pT;chjet<50 GeV/c, pseudorapidity |ηjet|<0.9−R, and with the jet resolution parameters R = 0.2, 0.4, 0.6. The distribution of the jet momentum fraction carried by a D0 meson along the jet axis (zch||) was measured in the range 0.4<zch||<1.0 in four ranges of the jet transverse momentum. Comparisons of results for different collision energies and jet resolution parameters are also presented. The measurements are compared to predictions from Monte Carlo event generators based on leading-order and next-to-leading-order perturbative quantum chromodynamics calculations. A generally good description of the main features of the data is obtained in spite of a few discrepancies at low pT;chjet. Measurements were also done for R=0.3 at s√ = 5.02 TeV and are shown along with their comparisons to theoretical predictions in an appendix to this paper.
The standard view of the form-meaning interfaces, as embraced by the great majority of contemporary grammatical frameworks, consists in the assumption that meaning can be associated with grammatical form in a one-to-one correspondence. Under this view, composition is quite straightforward, involving concatenation of form, paired with functional application in meaning. In this book, we discuss linguistic phenomena across several grammatical sub-modules (morphology, syntax, semantics) that apparently pose a problem to the standard view, mapping out the potential for deviation from the ideal of one-to-one correspondences, and develop formal accounts of the range of phenomena. We argue that a constraint-based perspective is particularly apt to accommodate deviations from one-to-many correspondences, as it allows us to impose constraints on full structures (such as a complete word or the interpretation of a full sentence) instead of deriving such structures step by step.
Most of the papers in this volume are formulated in a particular constraint-based grammar framework, Head-driven Phrase Structure Grammar. The contributions investigate how the lexical and constructional aspects of this theory can be combined to provide an answer to this question across different linguistic sub-theories.
Transnational Legal History : Erforschung rechtlicher Entwicklungen jenseits nationaler Grenzen
(2023)
SAFE Update April 2024
(2024)
The azimuthal (Δφ) correlation distributions between heavy-flavor decay electrons and associated charged particles are measured in pp and p−Pb collisions at sNN−−−√=5.02 TeV. Results are reported for electrons with transverse momentum 4<pT<16 GeV/c and pseudorapidity |η|<0.6. The associated charged particles are selected with transverse momentum 1<pT<7 GeV/c, and relative pseudorapidity separation with the leading electron |Δη|<1. The correlation measurements are performed to study and characterize the fragmentation and hadronization of heavy quarks. The correlation structures are fitted with a constant and two von Mises functions to obtain the baseline and the near- and away-side peaks, respectively. The results from p−Pb collisions are compared with those from pp collisions to study the effects of cold nuclear matter. In the measured trigger electron and associated particle kinematic regions, the two collision systems give consistent results. The Δφ distribution and the peak observables in pp and p−Pb collisions are compared with calculations from various Monte Carlo event generators.
A newly developed observable for correlations between symmetry planes, which characterize the direction of the anisotropic emission of produced particles, is measured in Pb-Pb collisions at sNN−−−√=2.76 TeV with ALICE. This so-called Gaussian Estimator allows for the first time the study of these quantities without the influence of correlations between different flow amplitudes. The centrality dependence of various correlations between two, three and four symmetry planes is presented. The ordering of magnitude between these symmetry plane correlations is discussed and the results of the Gaussian Estimator are compared with measurements of previously used estimators. The results utilizing the new estimator lead to significantly smaller correlations than reported by studies using the Scalar Product method. Furthermore, the obtained symmetry plane correlations are compared to state-of-the-art hydrodynamic model calculations for the evolution of heavy-ion collisions. While the model predictions provide a qualitative description of the data, quantitative agreement is not always observed, particularly for correlators with significant non-linear response of the medium to initial state anisotropies of the collision system. As these results provide unique and independent information, their usage in future Bayesian analysis can further constrain our knowledge on the properties of the QCD matter produced in ultrarelativistic heavy-ion collisions.
ISOE-Newsletter Nr. 6/2023
(2023)
Bürger-Universität: Gesundheitsfolgen des Klimawandels: Frankfurts Wege zur Klimaanpassung +++ „Insectopolis“: ISOE vergibt Kunststipendium zum Thema Insektenvielfalt in der Stadt +++ Pendelmobilität nachhaltiger gestalten – Empfehlungen aus dem Forschungsprojekt „PendelLabor“ +++ ISOE-Lecture: Soziale Ökologie für Entscheidungsträger*innen +++ Bedrohte Insektenvielfalt in Naturschutzgebieten – Empfehlungen aus dem Forschungsprojekt DINA +++ Transdisziplinäre Forschung – Mehrwert für die Wissenschaft +++ Mobilitätsstudie für die Region Rhein-Main-Neckar – Bausteine für eine multimodale und klimaschonende Mobilität +++ Hessischer Klimabeirat appelliert an Koalitionsparteien: Land Hessen muss beim Klimaschutz entschieden handeln +++ Aus dem ISOE +++ Das ISOE in den Medien +++ Termine +++ Publikationen
Rezensionen zu:
Johannes Diehl, Markus Witte Hebräisches und aramäisches Wörterbuch zum Alten Testament Begründet von Georg Fohrer. 4., völlig neu bearb. Aufl., De Gruyter, Berlin/Boston 2021.
Miriam von Nordheim-Diehl Streit um Korach. Eine biblische Figur zwischen Numeri, den Psalmen und der Chronik (Wissenschaftliche Monographien zum Alten und Neuen Testament, Bd. 176), Vandenhoeck & Ruprecht, Göttingen 2023.
Stefan Alkier, Thomas Paulsen (Hg.): Das Evangelium nach Lukas und die Taten der Abgesandten. Neu übersetzt (Frankfurter Neues Testament Bd. 4), Brill, Schöningh, Paderborn 2023
Stefan Alkier (Hg.): Zuversichtsargumente. Biblische Perspektiven in Krisen und Ängsten unserer Zeit Biblische Argumente in öffentlichen Debatten Bd. 3 (in zwei Bänden)
Stefan Alkier, Martin Keßler und Stefan Rhein (Hg.): Evangelische Kirchen und Politik in Deutschland. Konstellationen im 20. Jahrhundert. (Christentum in der modernen Welt, Bd. 5), Mohr Siebeck, Tübingen 2023.
Stefan Michels: Testes veritatis. Studien zur transformativen Entwicklung des Wahrheitszeugenkonzepts in der Wittenberger Reformation. (SMHR, Bd. 129), Mohr Siebeck, Tübingen 2022.
Volker Leppin, Stefan Michels (Hg.): Reformation als Transformation? Interdisziplinäre Zugänge zum Transformationsparadigma als historiographischer Beschreibungskategorie. (SMHR, Bd. 126), Mohr Siebeck, Tübingen 2022.
Tugrul Kurt, Felix Machka, Johannes Müller, Christoph Rogers (Hg.): Grenzgänge wissenschaftlicher Reflexivität in Judentum, Christentum und Islam. Wissenschaftliche Buchgesellschaft, Darmstadt 2023.
Heiko Schulz, Jon Stewart, Karl Verstrynge (Hg.): Kierkegaard Studies Yearbook 2023. De Gruyter, Berlin/Boston 2023.
Heiko Schulz (Hg.): Das Böse – die Scham – das Opfer. Drei religiöse Kernphänomene in philosophisch-theologischer Perspektive. (Kleine Schriften des Fachbereichs Evangelische Theologie der Goethe-Universität Frankfurt am Main, Bd. 14), Evangelische Verlagsanstalt Leipzig 2023.
Harmjan Dam: Kirchengeschichte kompetenzorientiert unterrichten. Ein
Arbeitsbuch. Verlag W. Kohlhammer, Stuttgart 2023.
David Käbisch, Juliane Keitel (Hg.): Religion und Populismus. (Religion unterrichten, Bd. 2/2), Vandenhoeck & Ruprecht, Göttingen 2021.
Ann-Kathrin Knittel: Predigt und Exegese im Atelier. Kohlhammer, Stuttgart 2023.Walter Pohl, Andre Gingrich, Nathan P. Gibson (Hg.): Knowledge Collaboration among Jews, Christians, Zoroastrians, and Muslims in the Abbasid Near East I. Medieval Worlds 17 (2022), https://doi.org/10.1553/medievalworlds_no17_2022.
Walter Pohl, Andre Gingrich, Nathan P. Gibson (Hg.): Knowledge Collaboration among Jews, Christians, Zoroastrians, and Muslims in the Abbasid Near East II. Medieval Worlds 18 (July 2023),
https://doi.org/10.1553/medievalworlds_no18_2023.
Christian Wiese, Stefan Vogt, Mirjam Wenzel, Doron Kiesel, Gury SchneiderLudorff (Hg.): Das jüdische Frankfurt. Von der Emanzipation bis 1933. (Kontexte zur jüdischen Geschichte Hessens, Bd. 2), De Gruyter, Berlin / Boston 2023.
Claudio Carvalho, Ephraim Meir und Christian Wiese (Hg.): Rosenzweig Jahrbuch / Rosenzweig Yearbook 13: Transzendenz und Offenbarung / Transcendence and Revelation. Verlag Karl Alber, Freiburg i. Br. 2023.
Andrea Kirchner: Emissär der jüdischen Sache. Eine politische Biografie Richard Lichtheims. Instituts, Bd. 35), Vandenhoeck & Ruprecht, Göttingen 2023.
Andrea Kirchner (Hg.): Von Konstantinopel nach Genf. Quellen zum Wirken Richard Lichtheims. (Archiv jüdischer Geschichte und Kultur, Bd. 7), Vandenhoeck & Ruprecht, Göttingen 2022.
Measurements of the elliptic flow coefficient relative to the collision plane defined by the spectator neutrons v2{ΨSP} in collisions of Pb ions at center-of-mass energy per nucleon-nucleon pair sNN−−−√=2.76 TeV and Xe ions at sNN−−−√=5.44 TeV are reported. The results are presented for charged particles produced at midrapidity as a function of centrality and transverse momentum. The ratio between v2{ΨSP} and the elliptic flow coefficient relative to the participant plane v2{4}, estimated using four-particle correlations, deviates by up to 20% from unity depending on centrality. This observation differs strongly from the magnitude of the corresponding eccentricity ratios predicted by the TRENTo and the elliptic power models of initial state fluctuations that are tuned to describe the participant plane anisotropies. The differences can be interpreted as a decorrelation of the neutron spectator plane and the reaction plane because of fragmentation of the remnants from the colliding nuclei, which points to an incompleteness of current models of initial state fluctuations. A significant transverse momentum dependence of the ratio v2{ΨSP}/v2{4} is observed in all but the most central collisions, which may help to understand whether momentum anisotropies at low and intermediate transverse momentum have a common origin in initial state fluctuations. The ratios of v2{ΨSP} and v2{4} to the corresponding initial state eccentricities for Xe-Xe and Pb-Pb collisions at similar initial entropy density show a difference of (7.0±0.9)% with an additional variation of +1.8% when including RHIC data in the TRENTo parameter extraction. These observations provide new experimental constraints for viscous effects in the hydrodynamic modeling of the expanding quark-gluon plasma.
This article presents new measurements of the fragmentation properties of jets in both proton-proton (pp) and heavy-ion collisions with the ALICE experiment at the Large Hadron Collider (LHC). We report distributions of the fraction zr of transverse momentum carried by subjets of radius r within jets of radius R. Charged-particle jets are reconstructed at midrapidity using the anti-kT algorithm with jet radius R=0.4, and subjets are reconstructed by reclustering the jet constituents using the anti-kT algorithm with radii r=0.1 and r=0.2. In proton-proton collisions, we measure both the inclusive and leading subjet distributions. We compare these measurements to perturbative calculations at next-to-leading logarithmic accuracy, which suggest a large impact of threshold resummation and hadronization effects on the zr distribution. In heavy-ion collisions, we measure the leading subjet distributions, which allow access to a region of harder jet fragmentation than has been probed by previous measurements of jet quenching via hadron fragmentation distributions. The zr distributions enable extraction of the parton-to-subjet fragmentation function and allow for tests of the universality of jet fragmentation functions in the quark-gluon plasma (QGP). We find indications that there is a turnover in the ratio between the distributions in Pb-Pb and pp collisions as zr→1, exposing qualitatively new possibilities to disentangle competing jet quenching mechanisms. By comparing our results to theoretical calculations based on an independent extraction of the parton-to-jet fragmentation function, we find consistency with the universality of jet fragmentation and no indication of factorization breaking in the QGP.
The production yields of non-prompt Ds+ mesons, namely Ds+ mesons from beauty-hadron decays, were measured for the first time as a function of the transverse momentum (pT) at midrapidity (|y|<0.5) in central and semi-central Pb−Pb collisions at a centre-of-mass energy per nucleon pair sNN−−−√=5.02 TeV with the ALICE experiment at the LHC. The Ds+ mesons and their charge conjugates were reconstructed from the hadronic decay channel Ds+→ϕπ+, with ϕ→K−K+, in the 4<pT<36 GeV/c and 2<pT<24 GeV/c intervals for the 0−10% and 30−50% centrality classes, respectively. The measured yields of non-prompt Ds+ mesons are compared to those of prompt Ds+ and non-prompt D0 mesons by calculating the ratios of the production yields in Pb−Pb collisions and the nuclear modification factor RAA. The ratio between the RAA of non-prompt Ds+ and prompt Ds+ mesons, and that between the RAA of non-prompt Ds+ and non-prompt D0 mesons in central Pb−Pb collisions are found to be on average higher than unity in the 4<pT<12 GeV/c interval with a statistical significance of about 1.6σ and 1.7σ, respectively. The measured RAA ratios are compared with the predictions of theoretical models of heavy-quark transport in a hydrodynamically expanding QGP that incorporate hadronisation via quark recombination.
Charmonium production in pp collisions at center-of-mass energy of s√ = 13 TeV and p-Pb collisions at center-of-mass energy per nucleon pair of sNN−−−√ = 8.16 TeV is studied as a function of charged-particle pseudorapidity density with ALICE. Ground and excited charmonium states (J/ψ, ψ(2S)) are measured from their dimuon decays in the interval of rapidity in the center-of-mass frame 2.5<ycms<4.0 for pp collisions, and 2.03<ycms<3.53 and −4.46<ycms<−2.96 for p-Pb collisions. The charged-particle pseudorapidity density is measured around midrapidity (|η|<1.0). In pp collisions, the measured charged-particle multiplicity extends to about six times the average value, while in p-Pb collisions at forward (backward) rapidity a multiplicity corresponding to about three (four) times the average is reached. The ψ(2S) yield increases with the charged-particle pseudorapidity density. The ratio of ψ(2S) over J/ψ yield does not show a significant multiplicity dependence in either colliding system, suggesting a similar behavior of J/ψ and ψ(2S) yields with respect to charged-particle pseudorapidity density. The results are also compared with model calculations.
The first experimental information on the strong interaction between Λ and Ξ− strange baryons is presented in this Letter. The correlation function of Λ−Ξ− and Λ¯¯¯¯−Ξ¯¯¯¯+ pairs produced in high-multiplicity proton-proton (pp) collisions at s√ = 13 TeV at the LHC is measured as a function of the relative momentum of the pair. The femtoscopy method is used to calculate the correlation function, which is then compared with theoretical expectations obtained using a meson exchange model, chiral effective field theory, and Lattice QCD calculations close to the physical point. Data support predictions of small scattering parameters while discarding versions with large ones, thus suggesting a weak Λ−Ξ− interaction. The limited statistical significance of the data does not yet allow one to constrain the effects of coupled channels like Σ−Ξ and N−Ω.
Two-particle transverse momentum differential correlators, recently measured in Pb--Pb collisions at energies available at the CERN Large Hadron Collider (LHC), provide an additional tool to gain insights into particle production mechanisms and infer transport properties, such as the ratio of shear viscosity to entropy density, of the medium created in Pb-Pb collisions. The longitudinal long-range correlations and the large azimuthal anisotropy measured at low transverse momenta in small collision systems, namely pp and p-Pb, at LHC energies resemble manifestations of collective behaviour. This suggests that locally equilibrated matter may be produced in these small collision systems, similar to what is observed in Pb-Pb collisions. In this work, the same two-particle transverse momentum differential correlators are exploited in pp and p-Pb collisions at √s=7 TeV and sNN−−−√=5.02 TeV, respectively, to seek evidence for viscous effects. Specifically, the strength and shape of the correlators are studied as a function of the produced particle multiplicity to identify evidence for longitudinal broadening that might reveal the presence of viscous effects in these smaller systems. The measured correlators and their evolution from pp and p--Pb to Pb--Pb collisions are additionally compared to predictions from Monte Carlo event generators, and the potential presence of viscous effects is discussed.
Jet-like correlations with respect to K0S and Λ (Λ‾) in pp and Pb–Pb collisions at √sNN = 5.02 TeV
(2022)
Two-particle correlations with K0S, Λ/Λ¯, and charged hadrons as trigger particles in the transverse momentum range 8<pT,trig<16 GeV/c, and associated charged particles within 1<pT,assoc<8 GeV/c, are studied at mid-rapidity in pp and central Pb-Pb collisions at a centre-of-mass energy per nucleon-nucleon collision sNN−−−√=5.02 TeV with the ALICE detector at the LHC. After subtracting the contributions of the flow background, the per-trigger yields are extracted on both the near and away sides, and the ratio in Pb-Pb collisions with respect to pp collisions (IAA) is computed. The per-trigger yield in Pb-Pb collisions on the away side is strongly suppressed to the level of IAA≈0.6 for pT,assoc>3 GeV/c as expected from strong in-medium energy loss, while an enhancement develops at low pT,assoc on both the near and away sides, reaching IAA≈1.8 and 2.7 respectively. These findings are in good agreement with previous ALICE measurements from two-particle correlations triggered by neutral pions (π0-h) and charged hadrons (h-h) in Pb-Pb collisions at sNN−−−√=2.76 TeV. Moreover, the correlations with K0S mesons and Λ/Λ¯ baryons as trigger particles are compared to those of inclusive charged hadrons. The results are compared with the predictions of Monte Carlo models.
The measurement of the production of deuterons, tritons and 3He and their antiparticles in Pb-Pb collisions at sNN−−−√=5.02 TeV is presented in this article. The measurements are carried out at midrapidity (|y|< 0.5) as a function of collision centrality using the ALICE detector. The pT-integrated yields, the coalescence parameters and the ratios to protons and antiprotons are reported and compared with nucleosynthesis models. The comparison of these results in different collision systems at different centre-of-mass collision energies reveals a suppression of nucleus production in small systems. In the Statistical Hadronisation Model framework, this can be explained by a small correlation volume where the baryon number is conserved, as already shown in previous fluctuation analyses. However, a different size of the correlation volume is required to describe the proton yields in the same data sets. The coalescence model can describe this suppression by the fact that the wave functions of the nuclei are large and the fireball size starts to become comparable and even much smaller than the actual nucleus at low multiplicities.