Search Results - (Author, Cooperation:M. Albrow)
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1Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-05-10Publisher: Institute of Physics Publishing (IOP)Electronic ISSN: 1748-0221Topics: PhysicsPublished by: -
2Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-10-03Publisher: Institute of Physics Publishing (IOP)Electronic ISSN: 1748-0221Topics: PhysicsPublished by: -
3Latest Papers from Table of Contents or Articles in PressA. Gould ; A. Udalski ; I. G. Shin ; I. Porritt ; J. Skowron ; C. Han ; J. C. Yee ; S. Kozlowski ; J. Y. Choi ; R. Poleski ; L. Wyrzykowski ; K. Ulaczyk ; P. Pietrukowicz ; P. Mroz ; M. K. Szymanski ; M. Kubiak ; I. Soszynski ; G. Pietrzynski ; B. S. Gaudi ; G. W. Christie ; J. Drummond ; J. McCormick ; T. Natusch ; H. Ngan ; T. G. Tan ; M. Albrow ; D. L. DePoy ; K. H. Hwang ; Y. K. Jung ; C. U. Lee ; H. Park ; R. W. Pogge ; F. Abe ; D. P. Bennett ; I. A. Bond ; C. S. Botzler ; M. Freeman ; A. Fukui ; D. Fukunaga ; Y. Itow ; N. Koshimoto ; P. Larsen ; C. H. Ling ; K. Masuda ; Y. Matsubara ; Y. Muraki ; S. Namba ; K. Ohnishi ; L. Philpott ; N. J. Rattenbury ; T. Saito ; D. J. Sullivan ; T. Sumi ; D. Suzuki ; P. J. Tristram ; N. Tsurumi ; K. Wada ; N. Yamai ; P. C. Yock ; A. Yonehara ; Y. Shvartzvald ; D. Maoz ; S. Kaspi ; M. Friedmann
American Association for the Advancement of Science (AAAS)
Published 2014Staff ViewPublication Date: 2014-07-06Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
4Articles: DFG German National LicensesStaff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] IN the past few years high energy physicists have progressed beyond the study of the interactions of the strongly interacting particles, the hadrons, to the study of the inter iCtions of their constituents. All known and postulated observable 'elementary particles' fall into three classes (see the ...Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesBennett, D. P. ; Fouqué, P. ; Williams, A. ; Dominik, M. ; Jørgensen, U. G. ; Kubas, D. ; Cassan, A. ; Coutures, C. ; Greenhill, J. ; Hill, K. ; Menzies, J. ; Sackett, P. D. ; Albrow, M. ; Brillant, S. ; Caldwell, J. A. R. ; Calitz, J. J. ; Cook, K. H. ; Corrales, E. ; Desort, M. ; Dieters, S. ; Dominis, D. ; Donatowicz, J. ; Hoffman, M. ; Kane, S. ; Marquette, J.-B.
[s.l.] : Nature Publishing Group
Published 2006Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] In the favoured core-accretion model of formation of planetary systems, solid planetesimals accumulate to build up planetary cores, which then accrete nebular gas if they are sufficiently massive. Around M-dwarf stars (the most common stars in our Galaxy), this model favours the formation of ...Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesÅkesson, T. ; Albrow, M. G. ; Almehed, S. ; Benary, O. ; Bøggild, H. ; Botner, O. ; Breuker, H. ; Burkert, V. ; Carter, A. A. ; Carter, J. R. ; Cleland, W. E. ; Dagan, S. ; Dahl-Jensen, E. ; Dahl-Jensen, I. ; Damgaard, G. ; Fabjan, C. W. ; Frankel, S. ; Goerlach, U. ; Hansen, K. H. ; Hedberg, V. ; Jarlskog, G. ; Kjaer, N. ; Kroeger, R. ; Kulka, K. ; Lissauer, D.
Springer
Published 1987Staff ViewISSN: 1434-6052Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract We have observed an enhanced production of pairs and triplets of identical charged particles at small momentum differences in events with two central jets produced inpp collisions at the CERN Intersecting Storage Rings. The size and structure of this ‘Bose-Einstein’ enhancement, shown by the particles within a jet, resembles that observed in minimum-bias events. The correlation function can be well parametrized by the single variableQ — the absolute value of the four-momentum transfer — and is more peaked than a single Gaussian.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesBorer, K. ; Dittus, F. ; Frei, D. ; Hugentobler, E. ; Pal, T. ; Pretzl, K. ; Schacher, J. ; Stoffel, F. ; Hovander, B. ; Sellden, B. ; Bohm, C. ; Gossling, C. ; Pollmann, D. ; Appelquist, G. ; Albrow, M. ; Zhang, Q.P. ; Klingenberg, R. ; Volken, W.
Amsterdam : ElsevierStaff ViewISSN: 0168-9002Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesBorer, K. ; Hugentobler, E. ; Muller, L. ; Pal, T. ; Pretzl, K. ; Schacher, J. ; Schwab, P. ; Stoffel, F. ; Sellden, B. ; Gaillard, J.-M. ; Albrow, M. ; Parker, M.A. ; DeWolf, R. ; White, T.O. ; Volken, W.
Amsterdam : ElsevierStaff ViewISSN: 0168-9002Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesHauser, J. ; Lindgren, M. ; Muller, T. ; Neuberger, D. ; Albrow, M. ; Drake, G. ; Freeman, J. ; Kim, D.H. ; Bodek, A. ; Laasenen, A. ; Winer, B. ; Pauletta, C. ; Apollinari, G. ; Budd, H.S. ; Goulianos, K. ; Mishina, M. ; de Barbaro, P. ; Limon, P.J. ; Fan, Q. ; Wang, Q.F. ; White, S. ; Barnes, V. ; Sakumoto, W.K. ; Fukui, Y.
Amsterdam : ElsevierStaff ViewISSN: 0168-9002Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesAkesson, T. ; Albrow, M. G. ; Almehed, S. ; Batley, R. ; Benary, O. ; Bøggild, H. ; Botner, O. ; Brody, H. ; Burkert, V. ; Carosi, R. ; Cleland, W. ; Cockerill, D. ; Dagan, S. ; Dahl-Jensen, E. ; Dahl-Jensen, I. ; Damgaard, G. ; Ciaccio, A. ; Evans, W. M. ; Fabjan, C. W. ; Frandsen, P. ; Frankel, S. ; Frati, W. ; Gordon, H. ; Goerlach, U. ; Hallgren, A.
Springer
Published 1983Staff ViewISSN: 1434-6052Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract The inclusive π0 production cross-section and the η/π0 ratio have been measured inpp collisions at $$\sqrt s = 63 GeV$$ at the CERN Intersecting Storage Rings in the rapidity range 2.00〈y〈2.75. The π0 cross-section exhibits a strongy-dependence and falls more steeply as a function ofp T, compared with the cross-section measured aty∼0. We find a value of 0.46±0.07 for the η/π0 ratio with no significantp T dependence over the range 2.0〈p T〈4.0 GeV/c.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesÅkesson, T. ; Albrow, M. G. ; Almehed, S. ; Anassontzis, E. ; Batley, R. ; Benary, O. ; Boggild, H. ; Botner, O. ; Breuker, H. ; Burkert, V. ; Callen, B. ; Carosi, R. ; Carter, A. A. ; Carter, J. R. ; Cecil, P. C. ; Chernyatin, V. ; Choi, Y. ; Cleland, W. E. ; Dagan, S. ; Dahl-Jensen, E. ; Dahl-Jensen, I. ; Dam, P. ; Damgaard, G. ; Dolgoshein, B. ; Eidelman, S.
Springer
Published 1986Staff ViewISSN: 1434-6052Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract We have studied the processpp→γγ+X at $$\sqrt s = 63 GeV$$ GeV in the central rapidity region. We report a positive signal at 96% C.L., a ratio γγ/e + e −=4.0±3.0 when the transverse momentum of each photon is above 2 GeV/c, and a cross-sectiondσ/dydM γγ=(5.5±2.7)×10−34 cm2/GeV when |y|〈0.5,4〈M γγ〈6 GeV.Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesAlbajar, C. ; Albrow, M. G. ; Allkofer, O. C. ; Astbury, A. ; Aubert, B. ; Axon, T. ; Bacci, C. ; Bacon, T. ; Bains, N. ; Batley, J. R. ; Bauer, G. ; Beingessner, S. ; Bellinger, J. ; Bettini, A. ; Bezaguet, A. ; Bonino, R. ; Bos, K. ; deBrion, J. P. ; Buckley, E. ; Busetto, G. ; Catz, P. ; Cennini, P. ; Centro, S. ; Ceradini, F. ; Charlton, D. G.
Springer
Published 1988Staff ViewISSN: 1434-6052Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract We report on a search for new heavy quarks using data collected by the UA1 experiment during 1983, 1984 and 1985 at the CERN proton-antiproton collider, corresponding to an integrated luminosity of approximately 700 nb−1. Studying events with a muon or an isolated electron, accompanied by one or more jets, we find good agreement between our data and Monte Carlo predictions for the production of charm and beauty, without the need for a new quark. A top quark model, involving the decayW→t $$\bar b$$ and directt $$\bar t$$ production via the strong interaction, is used to determine our detection efficiency for top. This allows us to place an upper limit on the cross section for producing top quarks as a function of the top quark mass. Our analysis is not sensitive to theW→t $$\bar b$$ process alone. By comparing our limit with a calculation of thet $$\bar t$$ cross section, added to theW→t $$\bar b$$ cross section derived from our own measurements ofW →lv, we are able to place a lower limit on the mass of the top quark. From the lowest order (α s 2 ) calculation, using the choice of structure functions andQ 2 scale that give the lowest cross section, we find: $$m_{top} 〉 44GeV/c^2 \left( {95\% c.l.} \right).$$ Including an estimate of the next higher order (α s 2 ) and calculating the cross section with the EUROJET QCD Monte Carlo program using a less extreme choice for the structure functions andQ 2 scale gives: $$m_{top} 〉 56GeV/c^2 \left( {95\% c.l.} \right).$$ A search has also been made for a fourth generation, charge 1/3 quark (b'). Assuming that theb' mass is smaller than that of the top quark and that it can-not be produced inW decays, the mass limits, using the above procedures, are respectivelym b' 〉32 GeV/c2 andm b' 〉44 GeV/c2, both at 95% confidence level.Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesAlbajar, C. ; Albrow, M. G. ; Allkofer, O. C. ; Andrieu, B. ; Ankoviak, K. ; Apsimon, R. ; Aubert, B. ; Bacci, C. ; Bartha, S. ; Bauer, G. ; Beingessner, S. ; Bettini, A. ; Bezaguet, A. ; Biddulph, P. ; Bohn, H. ; Böhrer, A. ; Bonino, R. ; Bos, K. ; Botlo, M. ; Brockhausen, D. ; Buchanan, C. ; Buschbeck, B. ; Busetto, G. ; Caner, A. ; Casoli, P.
Springer
Published 1990Staff ViewISSN: 1434-6052Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract We report on a search for new heavy quarks decaying semileptonically into muons, using 4.7 pb−1 of data taken during the CERN $$p\bar p$$ collider runs in 1988 and 1989. The properties of isolated muons accompanied by jets are consistent with the predictions from the Standard Model but do not show a signal for a new heavy quark. Combining all the UA1 data (5.4 pb−1), lower mass limits are obtained at 60 GeV/c2 (95% CL) for thet-quark and 43 GeV/c2 (95% CL) for a fourth-generation charge-1/3 quark (b′-quark).Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesÅkesson, T. ; Albrow, M. G. ; Almehed, S. ; Batley, R. ; Benary, O. ; Bøggild, H. ; Botner, O. ; Breuker, H. ; Brody, H. ; Burkert, V. ; Callen, B. ; Carosi, R. ; Carter, A. A. ; Carter, J. R. ; Cecil, P. ; Choi, Y. ; Cleland, W. E. ; Cockerill, D. ; Dagan, S. ; Dahl-Jensen, E. ; Dahl-Jensen, I. ; Dam, P. ; Damgaard, G. ; Eidelman, S. ; Evans, W. M.
Springer
Published 1984Staff ViewISSN: 1434-6052Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract The properties of high-E T events produced inpp collisions at $$\sqrt s $$ =63 GeV have been studied at the CERN Intersecting Storage Rings. The fragmentation of the jets is found to be very similar to that of jets produced ine + e − annihilation and at the SPS $$p\bar p$$ collider. We measure an excess of soft particles compared withe + e − events and this underlying event is found to be sensitive to the trigger. Thep T balance between the jets is measured. The distribution of charges in the jets indicates that a substantial fraction of the jets originate from valence quarks.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesÅkesson, T. ; Albrow, M. G. ; Almehed, S. ; Batley, R. ; Benary, O. ; Bøggild, H. ; Botner, O. ; Breuker, H. ; Callen, B. ; Carter, A. A. ; Carter, J. R. ; Cecil, P. ; Choi, Y. ; Cleland, W. E. ; Dagan, S. ; Dahl-Jensen, E. ; Dahl-Jensen, I. ; Damgaard, G. ; Fabjan, C. W. ; Frankel, S. ; Frati, W. ; Goerlach, U. ; Gordon, H. ; Hansen, K. H. ; Hedberg, V.
Springer
Published 1986Staff ViewISSN: 1434-6052Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract We present stdies of events triggered on two high-p T jets, produced inpp collisions at the CERN Intersecting Storage Rings (ISR) at $$\sqrt s $$ =63 GeV, using a large solid angle calorimeter. The cross-section for producing two jets is measured in the dijet mass range 17–50 GeV/c2. A high-statistics sample of dijet events, where each jet has transverse energy above 10 GeV, is used to study the structure of jets and the associated event. We find the longitudinal fragmentation function to be similar to that of jets emerging frome + e − collisions but considerably harder than that observed at the Super Proton Synchrotron (SPS) $$p\bar p$$ Collider. A steepening of the fragmentation function is observed when increasing the jet energy. Studies of the charge distribution in jets show that these predominantly originate from fragmenting valence quarks. The transverse energy and particle flows are presented as functions of the azimuthal distance from the jet axis.Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesÅkesson, T. ; Albrow, M. G. ; Almehed, S. ; Anassontzis, E. ; Batley, R. ; Benary, O. ; Bøggild, H. ; Botner, O. ; Breuker, H. ; Burkert, V. ; Callen, B. ; Carosi, R. ; Carter, A. A. ; Carter, J. R. ; Cecil, P. C. ; Chernyatin, V. ; Choi, Y. ; Cleland, W. E. ; Dagan, S. ; Dahl-Jensen, E. ; Dahl-Jensen, I. ; Dam, P. ; Damgaard, G. ; Dolgoshein, B. ; Eidelman, S.
Springer
Published 1987Staff ViewISSN: 1434-6052Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract We have determined the double inclusive cross-section for opposite-side high-p T photons and away-side jets withθ γ ≈θ jet≈90° produced inpp collisions at the CERN Intersecting Storage Rings at $$\sqrt s = 63$$ GeV. Under the assumption that these events arise predominantly from the QCD gluon Compton process we have calculated the gluon structure function in the range 0.15≦x≦0.30 at an average square of the four-momentum transfer of 40 GeV2/c2. The data favour a soft gluon distribution in the proton.Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesÅkesson, T. ; Albrow, M. G. ; Almehed, S. ; Benary, O. ; Bøggild, H. ; Botner, O. ; Breuker, H. ; Carter, A. A. ; Carter, J. R. ; Choi, Y. ; Cleland, W. E. ; Dagan, S. ; Dahl-Jensen, E. ; Dahl-Jensen, I. ; Damgaard, G. ; Fabjan, C. W. ; Goerlach, U. ; Hansen, K. H. ; Hedberg, V. ; Jarlskog, G. ; Katsanevas, S. ; Kjaer, N. J. ; Kroeger, R. ; Kulka, K. ; Lissauer, D.
Springer
Published 1987Staff ViewISSN: 1434-6052Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract In a study ofpp collisions at $$\sqrt s = 63$$ GeV with more than 29 GeV total transverse energy emitted into 1.8 units of rapidity in the central region, we have extracted a sample of 4-jet events and compared it with models of the two sources of 4-jet production: double bremsstrahlung and double parton scattering. The data cannot be described by bremsstrahlung alone, and we extract the fraction of 4-jet events attributed to double parton scattering for various definitions of the 4-jet sample. We determine the double parton scattering/2-jet yield ratio, and this leads to a determination of the proton radius. We discuss the implications of our observations for the general understanding of high-ΣE T events.Type of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesAlbajar, C. ; Albrow, M. G. ; Allkofer, O. C. ; Astbury, A. ; Aubert, B. ; Axon, T. ; Bacci, C. ; Bacon, T. ; Bains, N. ; Batley, J. R. ; Bauer, G. ; Beingessner, S. ; Bellinger, J. ; Bettini, A. ; Bezaguet, A. ; Bonino, R. ; Bos, K. ; Brion, J. P. ; Buckley, E. ; Busetto, G. ; Catz, P. ; Cennini, P. ; Centro, S. ; Ceradini, F. ; Charlton, D. G.
Springer
Published 1988Staff ViewISSN: 1434-6052Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract We present a study of heavy flavour (charm and beauty) production using data collected with the UA1 detector at the CERN Proton-Antiproton collider at a centre-of-mass energy of 630 GeV for an integrated luminosity of 556 nb−1. This follows our earlier study ofb $$\bar b$$ andc $$\bar c$$ production in dimuon events and the evidence for mixing betweenB 0 and $$\bar B^0 $$ states. Properties of an inclusive sample of events containing a muon withp T 〉6 GeV/c are compared with QCD predictions for heavy flavour production, using the ISAJET Monte Carlo program. The predicted largep T muon yield from heavy flavour production and decay agrees with the data to within 30%. For events with a muon ofp T 〉10 GeV/c and at least one jet withE T 〉10 GeV, we measure the ratio charm/(charm+beauty) to be (24±8±9)%. We also show that the correlations observed between the two heavy quark jets expected by flavour conservation are consistent with the mixture of lowest and higher order QCD processes. We study in detail the topological and kinematic properties of a subsample of events containing a highp T muon and one or more jets. The good agreement of the theoretical predictions with our data in a region dominated by the production of charm and beauty shows that one of the main background sources to a new heavy quark signature is well understood.Type of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesÅkesson, T. ; Albrow, M. G. ; Almehed, S. ; Batley, R. ; Benary, O. ; Bøggild, H. ; Botner, O. ; Breuker, H. ; Callen, B. ; Carter, A. A. ; Carter, J. R. ; Cecil, P. ; Choi, Y. ; Cleland, W. E. ; Dagan, S. ; Dahl-Jensen, E. ; Dahl-Jensen, I. ; Damgaard, G. ; Fabjan, C. W. ; Frankel, S. ; Frati, W. ; Goerlach, U. ; Gordon, H. ; Hansen, K. H. ; Hedberg, V.
Springer
Published 1986Staff ViewISSN: 1434-6052Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract We have studiedpp collisions at the CERN ISR at $$\sqrt s = 63 GeV$$ using a jet trigger. We demonstrate that a sample of well-separated triple high-p T jet events can be described as due to the QCD bremsstrahlung process. The energy flow of these 3-jet events is well described by an independent fragmentation model, with a gluon-jet transverse width 33% greater than the quark-jet width. From the ratio of the 3- and 2-jet production crosssections the strong coupling is determined to lowest order in QCD. We find α s =0.18±0.03 (stat.) ±0.04 (stst.). The error does not include the theoretical uncertainty in the fragmentation scheme. We compare our results with measurements at the SPS Collider and discuss the different methods used.Type of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesAlbajar, C. ; Albrow, M. G. ; Allkofer, O. C. ; Arnison, G. ; Astbury, A. ; Aubert, B. ; Axon, T. J. ; Bacci, C. ; Bacon, T. ; Bains, N. ; Batley, J. R. ; Bauer, G. ; Beingessner, S. ; Bellinger, J. ; Bettini, A. ; Bézaguet, A. ; Bonino, R. ; Bos, K. ; Buckley, E. ; Busetto, G. ; Catz, P. ; Cennini, P. ; Centro, S. ; Ceradini, F. ; Charlton, D. G.
Springer
Published 1987Staff ViewISSN: 1434-6052Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract This is the first full solid angle analysis of large transverse energy events in $$p\bar p$$ collisions at the CERN collider. Events with transverse energies in excess of 200 GeV at $$\sqrt s = 630 GeV$$ are studied for any non-standard physics and quantitatively compared with expectations from perturbative QCD Monte Carlo models. A corrected differential cross section is presented. A detailed examination is made of jet profiles, event jet multiplicities and the fraction of the transverse energy carried by the two jets with the highest transverse jet energies. There is good agreement with standard theory for events with transverse energies up to the largest observed values $$( \approx \sqrt {s/2} )$$ and the analysis shows no evidence for any non-QCD mechanism to account for the event characteristics.Type of Medium: Electronic ResourceURL: