2,196 research outputs found
, J. Adomeit
No full text: The f 0 (1500) is observed in its KK decay 1 Now at College of William & Mary, Williamsburg,USA 2 Now at Universitat Dresden, Dresden, Germany 3 This work is the Ph.D. thesis of S. v. Dombrowski 4 University of Ljubljana, Ljubljana, Slovenia 5 University of Silesia, Katowice, Poland 6 Now at DESY, Hamburg, Germany 7 Now at CRPP, Ottawa, Canada 8 Now at Max Planck Institute, Munchen, Germany mode in an amplitude analysis of high statistics data in pp annihilation at rest into ß 0 KLKL . The mass and width is found to be (m; \Gamma) = (1515 \Sigma 20; 105 \Sigma 15) MeV. A comparison of the decay rate into 2ß 0 shows that this state cannot be dominantly ss. The f 0 2 (1525) has been observed for the first time in pp annihilation and its production rate is consistent with the expectation from the OZI rule. We have reported the observation of a new 0370-2693/96/$03.50 c fl Elsevier Science Publishers B.V. (North-Holland Physics Publishing Division) Volume 1, numb..
J. Adomeit, B. Kammle, J. Meier, P. Schmidt, R. Seibert, U. Strohbusch
No full textWe present a measurement and partial wave analysis of the final state KLK \Sigma ß \Upsilon of ¯ pp annihilation at rest in liquid hydrogen. This reaction is important for the study of the ¯ KK decay mode of scalar resonances, in particular the isovectors a 0 (980) and a 0 (1450). The determination of the a 0 (1450) production also fixes the ¯ KK coupling of the isoscalar f 0 (1500) which is discussed as a glueball. We find B(¯pp ! a 0 (1450)ß; a 0 (1450)! ¯ KK) = (8:88 \Sigma 1:68) \Delta 10 \Gamma4 and hence B(¯pp ! f 0 (1500)ß; f 0 (1500)! ¯ KK) = (4:52\Sigma0:36) \Delta 10 \Gamma4 . The mass and width of a 0 (1450) are m = 1480\Sigma30 MeV/c 2 and \Gamma = 265 \Sigma 15 MeV/c 2 , respectively. For a 0 (980) we determine the relative ratio B(¯pp! a 0 ß; a 0 ! ¯ KK)/ B(¯pp! a 0 ß; a 0 ! ßj) = 0:23 \Sigma 0:05 and its relative coupling, ¯ KK to ßj, is 1:03 \Sigma 0:14. 13.25.-k, 14.40.Cs, 14.40.Ev Typeset using REVT E X I. INTRODUCTION Proton-antiproton annihilation..
Search for a CP-odd Higgs boson decaying to Zh in pp collisions at root s=8 TeV with the ATLAS detector
No full textSee paper for full list of authors – 13 pages plus author list + cover pages (30 pages total), 5 figures, 2 tables, submitted to Phys. Lett. B, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2013-06/International audienceA search for a heavy, CP-odd Higgs boson, , decaying into a boson and a 125 GeV Higgs boson, , with the ATLAS detector at the LHC is presented. The search uses proton--proton collision data at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 20.3 fb. Decays of CP-even bosons to or pairs with the boson decaying to electron or muon pairs are considered, as well as decays with the boson decaying to neutrinos. No evidence for the production of an boson in these channels is found and the 95% confidence level upper limits derived for \sigma (gg\rightarrow A) \times \mbox{BR}(A \rightarrow Zh) \times \mbox{BR}(h \rightarrow f\bar{f}) are 0.098--0.013 pb for and 0.57--0.014 pb for in a range of 220--1000 GeV. The results are combined and interpreted in the context of two-Higgs doublet models
Transverse Momentum, Rapidity, and Centrality Dependence of Inclusive Charged-Particle Production in Root S(nn)=5.02 Tev P+pb Collisions Measured by the Atlas Experiment
No full textMeasurements of the per-event charged-particle yield as a function of the charged-particle transverse momentum and rapidity are performed using p + Pbcollision data collected by the ATLAS experiment at the LHC at a centre-of-mass energy of root sNN= 5.02 TeV. Charged particles are reconstructed over pseudorapidity |eta| 2.3and transverse momentum between 0.1GeVand 22GeVin a dataset corresponding to an integrated luminosity of 1 mu b(-1). The results are presented in the form of chargedparticle nuclear modification factors, where the p + Pbcharged-particle multiplicities are compared between central and peripheral p + Pbcollisions as well as to charged-particle cross sections measured in ppcollisions. The p + Pbcollision centrality is characterized by the total transverse energy measured in -4.9eta-3.1, which is in the direction of the outgoing lead beam. Three different estimations of the number of nucleons participating in the p + Pbcollision are carried out using the Glauber model and two Glauber-Gribov colour-fluctuation extensions to the Glauber model. The values of the nuclear modification factors are found to vary significantly as a function of rapidity and transverse momentum. Abroad peak is observed for all centralities and rapidities in the nuclear modification factors for chargedparticle transverse momentum values around 3GeV. The magnitude of the peak increases for more central collisions as well as rapidity ranges closer to the direction of the outgoing lead nucleus. (C) 2016 The Author(s). Published by Elsevier B.V
Measurement of the b(b)over-bar dijet cross section in pp collisions at root s=7TeV with the ATLAS detector
No full textThe dijet production cross section for jets containing a b-hadron (b-jets) has been measured in protonproton collisions with a centre-of-mass energy of root s = 7TeV, using the ATLAS detector at the LHC. The data used correspond to an integrated luminosity of 4.2 fb(-1). The cross section is measured for events with two identified b-jets with a transverse momentum pT > 20GeV and a minimum separation in the eta-phi plane of Delta R = 0.4. At least one of the jets in the event is required to have p(T) > 270GeV. The cross section is measured differentially as a function of dijet invariant mass, dijet transverse momentum, boost of the dijet system, and the rapidity difference, azimuthal angle and angular distance between the b-jets. The results are compared to different predictions of leading order and next-to-leading order perturbative quantum chromodynamics matrix elements supplemented with models for parton-showers and hadronization
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Fourteen fabulous acrostic bibliophiles
No full textAcrostics based on the names of 14 friends of the author, and his own. The title page and colophon are also written as acrostics also.
The people are: Robert E. Massmann; Samuel E. Murray; J.N.B. Artfield; Ruth E. adomeit; F. J. Board; Glen Dawson; A. J. St. Onge; Julia P. Wightman; Eugene D. Buchanan; Francis J. Gagiardi; Royce L. Gale Jr.; Philip Bliss; Julian I. Edison; and Raymond A. Smith
<b>Katarzyna Pełczyńska-Nałęczc</b> und <b>Piotr Buras:</b> The Minsk (dis)agreement and Europe's security order. 2017.<b>Katarzyna Pełczyńska-Nałęczc:</b> How do you avoid others talking over your head? 2016.<b>Sabine Fischer:</b> Sanktionen als Dauerzustand? 2017.<b>Nikolay Mitrokhin:</b> Diktaturtransfer im Donbass: Gewalt und „Staatsbildung“ 2017.<b>Katerina Bosko:</b> Post-Minsk-Realität: die Folgen der Donbass-Blockade durch ukrainische Rechtsradikale und der „Nationalisierung“ von Unternehmen durch die „Volksrepubliken“ 2017.
No full textSearch for W ' -> t(b)over-bar in the lepton plus jets final state in proton-proton collisions at a centre-of-mass energy of root s=8 TeV with the ATLAS detector
No full textA search for new charged massive gauge bosons, called W', is performed with the ATLAS detector at the LHC, in proton-proton collisions at a centre-of-mass energy of root s = 8 TeV, using a dataset corresponding to an integrated luminosity of 20.3 fb(-1). This analysis searches for W' bosons in the W' -> t (b) over tilde decay channel in final states with electrons or muons, using a multivariate method based on boosted decision trees. The search covers masses between 0.5 and 3.0 TeV, for right-handed or left-handed W' bosons. No significant deviation from the Standard Model expectation is observed and limits are set on the W' -> t (b) over bar cross-section times branching ratio and on the W'-boson effective couplings as a function of the W'-boson mass using the CLs procedure. For a left-handed (right-handed) W' boson, masses below 1.70 (1.92) TeV are excluded at 95% confidence level.ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1016/j.physletb.2015.02.051</p
<b>Alina Polyakova, Marlene Laruelle, Stefan Meister und Neil Barnett:</b> The Kremlin's Trojan Horses. 2016.
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