L. Rosenberg
Massachusetts Institute of Technology
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by L. Rosenberg.
Nuclear Physics | 2005
B. B. Back; M. D. Baker; M. Ballintijn; D.S. Barton; Bruce Becker; Russell Richard Betts; A. A. Bickley; R. Bindel; A. Budzanowski; Wit Busza; A. Carroll; Z. Chai; M.P. Decowski; E. García; T. Gburek; N. George; K. Gulbrandsen; S. Gushue; C. Halliwell; J. Hamblen; A.S. Harrington; M. Hauer; G.A. Heintzelman; C. Henderson; David Jonathan Hofman; R. S. Hollis; R. Holynski; Burt Holzman; A. Iordanova; E. Johnson
This paper describes the conclusions that can be drawn from the data taken thus far with the PHOBOS detector at RHIC. In the most central Au+Au collisions at the highest beam energy, evidence is found for the formation of a very high energy density system whose description in terms of simple hadronic degrees of freedom is inappropriate. Furthermore, the constituents of this novel system are found to undergo a significant level of interaction. The properties of particle production at RHIC energies are shown to follow a number of simple scaling behaviors, some of which continue trends found at lower energies or in simpler systems. As a function of centrality, the total number of charged particles scales with the number of participating nucleons. When comparing Au+Au at different centralities, the dependence of the yield on the number of participants at higher p T (∼4 GeV/c) is very similar to that at low transverse momentum. The measured values of charged particle pseudorapidity density and elliptic flow were found to be independent of energy over a broad range of pseudorapidities when effectively viewed in the rest frame of one of the colliding nuclei, a property we describe as “extended longitudinal scaling”. Finally, the centrality and energy dependences of several observables were found to factorize to a surprising degree.
Physical Review C | 2011
B. Alver; B. B. Back; M. D. Baker; M. Ballintijn; D.S. Barton; R. R. Betts; A. A. Bickley; R. Bindel; A. Budzanowski; W. Busza; A. Carroll; Z. Chai; V. Chetluru; M.P. Decowski; E. García; T. Gburek; N. George; K. Gulbrandsen; S. Gushue; C. Halliwell; J. Hamblen; G.A. Heintzelman; C. Henderson; D. J. Hofman; R. S. Hollis; R. Holynski; B. Holzman; A. Iordanova; E. Johnson; J.L. Kane
Pseudorapidity distributions of charged particles emitted in Au+Au, Cu+Cu, d+Au, and p+p collisions over a wide energy range have been measured using the PHOBOS detector at the BNL Relativistic Heavy-Ion Collider (RHIC). The centrality dependence of both the charged particle distributions and the multiplicity at midrapidity were measured. Pseudorapidity distributions of charged particles emitted with |{eta}|<5.4, which account for between 95% and 99% of the total charged-particle emission associated with collision participants, are presented for different collision centralities. Both the midrapidity density dN{sub ch}/d{eta} and the total charged-particle multiplicity N{sub ch} are found to factorize into a product of independent functions of collision energy, {radical}(s{sub N{sub N}}), and centrality given in terms of the number of nucleons participating in the collision, N{sub part}. The total charged particle multiplicity, observed in these experiments and those at lower energies, assumes a linear dependence of (lns{sub N{sub N}}){sup 2} over the full range of collision energy of {radical}(s{sub N{sub N}})=2.7-200 GeV.
Physical Review Letters | 2001
B. B. Back; W. Kucewicz; Andrzej Olszewski; A. Budzanowski; C. Halliwell; L. Rosenberg; P. Steinberg; M. Reuter; W. Skulski; J.-L. Tang; K. W. Wozniak; C. Henderson; Willis Lin; B. Wyslouch; E. Garcia; C. Reed; I.C. Park; G. van Nieuwenhuizen; A. H. Wuosmaa; Baker; Burt Holzman; C. Vale; G. S. F. Stephans; S. Manly; R. R. Betts; R. Verdier; G.A. Heintzelman; D.S. Barton; P. Sarin; A. Carroll
The charged-particle pseudorapidity density dN(ch)/d eta has been measured for Au+Au collisions at sqrt[s(NN)] = 130 GeV at RHIC, using the PHOBOS apparatus. The total number of charged particles produced for the 3% most-central Au+Au collisions for /eta/<or=5.4 is found to be 4200+/-470. The evolution of dN(ch)/d eta with centrality is discussed, and compared to model calculations and to data from proton-induced collisions. The data show an enhancement in charged-particle production at midrapidity, while in the fragmentation regions, the results are consistent with expectations from pp and pA scattering.
Physical Review C | 2005
B. B. Back; W. Kucewicz; A. Iordanova; A. Budzanowski; C. Halliwell; Andrzej Olszewski; L. Rosenberg; P. Steinberg; M. Reuter; W. Skulski; J.-L. Tang; K. Wozniak; C. Henderson; Willis Lin; B. Wyslouch; E. García; C. Reed; A. A. Bickley; M. Nguyen; G. van Nieuwenhuizen; Baker; I.C. Park; G. S. F. Stephans; S. Manly; R.R. Betts; M. Ballintijn; R. Verdier; Marguerite Tonjes; G.A. Heintzelman; D.S. Barton
This paper describes the measurement of elliptic flow for charged particles in Au+Au collisions at sqrt(sNN)=200 GeV using the PHOBOS detector at the Relativistic Heavy Ion Collider (RHIC). The measured azimuthal anisotropy is presented over a wide range of pseudorapidity for three broad collision centrality classes for the first time at this energy. Two distinct methods of extracting the flow signal were used in order to reduce systematic uncertainties. The elliptic flow falls sharply with increasing eta at 200 GeV for all the centralities studied, as observed for minimum-bias collisions at sqrt(sNN)=130 GeV.
Physical Review Letters | 1998
C. Hagmann; D. Kinion; W. Stoeffl; K. van Bibber; E. Daw; H. Peng; L. Rosenberg; J. Laveigne; P. Sikivie; N. S. Sullivan; D. B. Tanner; F.A. Nezrick; Michael S. Turner; D. M. Moltz; J. Powell; N.A. Golubev
We report the first results of a high-sensitivity
Physical Review Letters | 2002
B. B. Back; W. Kucewicz; A. Iordanova; A. Budzanowski; C. Halliwell; A. Olszewski; L. Rosenberg; P. Steinberg; M. Reuter; W. Skulski; J.-L. Tang; G. Roland; C. Henderson; Willis Lin; B. Wyslouch; E. García; C. Reed; I.C. Park; G. van Nieuwenhuizen; K. Wozniak; Baker; B. Holzman; C. Vale; R. Teng; G.S.F. Stephans; S. Manly; R. R. Betts; R. Verdier; D.S. Barton; P. Sarin
(\ensuremath{\sim}{10}^{\ensuremath{-}23}\mathrm{W})
Physics Reports | 2000
L. Rosenberg; Karl A. van Bibber
search for light halo axions through their conversion to microwave photons. At the 90% confidence level, we exclude a Kim-Shifman-Vainshtein-Zakharov axion of mass
Physics Letters B | 2004
B. B. Back; M. D. Baker; D.S. Barton; R. R. Betts; M. Ballintijn; A. A. Bickley; R. Bindel; A. Budzanowski; W. Busza; A. Carroll; M.P. Decowski; E. García; N. George; K. Gulbrandsen; S. Gushue; C. Halliwell; J. Hamblen; G.A. Heintzelman; C. Henderson; D. J. Hofman; R. S. Hollis; R. Holynski; B. Holzman; A. Iordanova; E. Johnson; J.L. Kane; J. Katzy; N. Khan; W. Kucewicz; P. Kulinich
2.9\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}
Physical Review C | 2004
B. B. Back; M. D. Baker; M. Ballintijn; D.S. Barton; R. R. Betts; A. A. Bickley; R. Bindel; A. Budzanowski; W. Busza; A. Carroll; M.P. Decowski; E. García; N. George; K. Gulbrandsen; S. Gushue; C. Halliwell; J. Hamblen; G.A. Heintzelman; C. Henderson; D. J. Hofman; R. S. Hollis; R. Holynski; B. Holzman; A. Iordanova; E. Johnson; J.L. Kane; J. Katzy; N. Khan; W. Kucewicz; P. Kulinich
to
The Astrophysical Journal | 2002
S.J. Asztalos; E. Daw; H. Peng; L. Rosenberg; D. B. Yu; C. Hagmann; D. Kinion; W. Stoeffl; K. van Bibber; Joseph Donald Laveigne; P. Sikivie; N. S. Sullivan; D. B. Tanner; F.A. Nezrick; D. M. Moltz
3.3\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}\mathrm{eV}