ϒ production in p–Pb collisions at √sNN=8.16 TeV

ϒ production in p–Pb interactions is studied at the centre-of-mass energy per nucleon–nucleon collision √sNN = 8.16 TeV with the ALICE detector at the CERN LHC. The measurement is performed reconstructing bottomonium resonances via their dimuon decay channel, in the centre-of-mass rapidity intervals 2.03 < ycms < 3.53 and −4.46 < ycms < −2.96, down to zero transverse momentum. In this work, results on the ϒ(1S) production cross section as a function of rapidity and transverse momentum are presented. The corresponding nuclear modification factor shows a suppression of the ϒ(1S) yields with respect to pp collisions, both at forward and backward rapidity. This suppression is stronger in the low transverse momentum region and shows no significant dependence on the centrality of the interactions. Furthermore, the ϒ(2S) nuclear modification factor is evaluated, suggesting a suppression similar to that of the ϒ(1S). A first measurement of the ϒ(3S) has also been performed. Finally, results are compared with previous ALICE measurements in p–Pb collisions at √sNN = 5.02 TeV and with theoretical calculations.publishedVersio

Novos registros de briófitas para Pernambuco, Brasil New records of bryophytes for the Pernambuco State, Brazil

Os novos registros são provenientes de um remanescente de Floresta Atlântica, a Reserva Ecológica do Gurjaú (08º10'00'' e 08º15'00''S; 35º02'30'' e 35º05'00''O), situada na região metropolitana do Recife, Pernambuco. São oito espécies de Lejeuneaceae: Archilejeunea auberiana (Mont.) A. Evans, Cololejeunea cardiocarpa (Mont.) A. Evans, Colura greig-smithii Jovet-Ast, Diplasiolejeunea cobrensis Gottsche ex Steph., Harpalejeunea stricta (Lindenb. & Gottsche) Steph., Lejeunea caespitosa Lindenb., L. monimiae (Steph.) Steph., L. quinqueumbonata Spruce,e uma de Bryaceae: Bryum pabstianum C. Muell. São apresentadas ilustrações, comentários taxonômicos e ecológicos, e distribuição geográfica das espécies no Brasil.<br>The new records were found in an Atlantic Forest remnant (tropical lowland rainforest), Reserva Ecológica do Gurjaú (08º10'00'' and 08º15'00''S; 35º02'30'' and 35º05'00''W), situated in the metropolitan area of Recife, Pernambuco State, Northeastern Brazil. The new occurrence corresponds to eight species of Lejeuneaceae: Archilejeunea auberiana (Mont.) A. Evans, Cololejeunea cardiocarpa (Mont.) A. Evans, Coluragreig-smithii Jovet-Ast, Diplasiolejeunea cobrensis Gottsche ex Steph., Harpalejeunea stricta (Lindenb. & Gottsche) Steph., Lejeunea caespitosa Lindenb., L. monimiae (Steph.) Steph., L. quinqueumbonata Spruce, and a Bryaceae: Bryum pabstianum C. Muell. Illustrations, floristic and ecological comments, and geographical distribution in Brazil are given for each species