SwePub
Sök i SwePub databas

  form:Ext_t

Träfflista för sökning "WAKA:ref ;pers:(Gustafsson Hans Åke);pers:(He X.);pers:(Kochenda L.);pers:(Hamagaki H.)"

form:Search_simp_t: WAKA:ref > Gustafsson Hans Åke > He X. > Kochenda L. > Hamagaki H.

  • navigation:Result_t 101-110 navigation:of_t 130
hitlist:Modify_result_t
   
hitlist:Enumeration_thitlist:Reference_thitlist:Reference_picture_thitlist:Find_Mark_t
101.
  • Adler, SS, et al. (creator_code:aut_t)
  • Measurement of transverse single-spin asymmetries for midrapidity production of neutral pions and charged hadrons in polarized p+p collisions at root s=200 GeV
  • 2005
  • record:In_t: Physical Review Letters. - 1079-7114. ; 95
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • Transverse single-spin asymmetries to probe the transverse-spin structure of the proton have been measured for neutral pions and nonidentified charged hadrons from polarized proton-proton collisions at midrapidity and root s = 200 GeV. The data cover a transverse momentum (pT) range 1.0-5.0 GeV/c for neutral pions and 0.5-5.0 GeV/c for charged hadrons, at a Feynman-x value of approximately zero. The asymmetries seen in this previously unexplored kinematic region are consistent with zero within errors of a few percent. In addition, the inclusive charged hadron cross section at midrapidity from 0.5 < P-T < 7.0 GeV/c is presented and compared to next-to-leading order perturbative QCD ( pQCD) calculations. Successful description of the unpolarized cross section above similar to 2 GeV/c suggests that pQCD is applicable in the interpretation of the asymmetry results in the relevant kinematic range.
  •  
102.
  • Adler, SS, et al. (creator_code:aut_t)
  • Midrapidity direct-photon production in p+p collisions at root s=200 GeV
  • 2005
  • record:In_t: Physical Review D (Particles and Fields). - 0556-2821. ; 71:7
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • A measurement of direct photons in p+p collisions at root s=200 GeV is presented. A photon excess above background from pi(0)->gamma+gamma, eta ->gamma+gamma and other decays is observed in the transverse momentum range 5.5 < p(T)< 7 GeV/c. The result is compared to a next-to-leading-order perturbative QCD calculation. Within errors, good agreement is found between the QCD calculation and the measured result.
  •  
103.
  •  
104.
  • Adler, SS, et al. (creator_code:aut_t)
  • Production of phi mesons at midrapidity in root S-NN=200 GeVAu+Au collisions at relativistic energies
  • 2005
  • record:In_t: Physical Review C (Nuclear Physics). - 0556-2813. ; 72:1
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • We present the results of phi meson production in the K+K- decay channel from Au+Au collisions at root s(NN) =200 GeV as measured at midrapidity by the PHENIX detector at Brookhaven National Laboratory's Relativistic Heavy Ion Collider. Precision resonance centroid and width values are extracted as a function of collision centrality. No significant variation from the Particle Data Group accepted values is observed, contrary to some model predictions. The phi transverse mass spectra are fitted with a linear exponential function for which the derived inverse slope parameter is seen to be constant as a function of centrality. However, when these data are fitted by a hydrodynamic model the result is that the centrality-dependent freeze-out temperature and the expansion velocity values are consistent with the values previously derived from fitting identified charged hadron data. As a function of transverse momentum the collisions scaled peripheral-to-central yield ratio R-CP for the phi is comparable to that of pions rather than that of protons. This result lends support to theoretical models that distinguish between baryons and mesons instead of particle mass for explaining the anomalous (anti) proton yield.
  •  
105.
  • Adler, S. S., et al. (creator_code:aut_t)
  • Azimuthal angle correlations for rapidity separated hadron pairs in d+Au collisions at root s(NN)=200 GeV
  • 2006
  • record:In_t: Physical Review Letters. - 1079-7114. ; 96:22
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • Deuteron-gold (d+Au) collisions at the Relativistic Heavy Ion Collider provide ideal platforms for testing QCD theories in dense nuclear matter at high energy. In particular, models suggesting strong saturation effects for partons carrying small nucleon momentum fraction (x) predict modifications to jet production at forward rapidity (deuteron-going direction) in d+Au collisions. We report on two-particle azimuthal angle correlations between charged hadrons at forward/backward (deuteron/gold going direction) rapidity and charged hadrons at midrapidity in d+Au and p+p collisions at root s(NN)=200 GeV. Jet structures observed in the correlations are quantified in terms of the conditional yield and angular width of away-side partners. The kinematic region studied here samples partons in the gold nucleus with x similar to 0.1 to similar to 0.01. Within this range, we find no x dependence of the jet structure in d+Au collisions.
  •  
106.
  • Adler, S. S., et al. (creator_code:aut_t)
  • Centrality dependence of charged hadron production in deuteron plus gold and nucleon plus gold collisions at root S-NN=200 GeV
  • 2008
  • record:In_t: Physical Review C (Nuclear Physics). - 0556-2813. ; 77:1
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • We present transverse momentum (p(T)) spectra of charged hadrons measured in deuteron-gold and nucleon-gold collisions at root s(NN)=200 GeV for four centrality classes. Nucleon-gold collisions were selected by tagging events in which a spectator nucleon was observed in one of two forward rapidity detectors. The spectra and yields were investigated as a function of the number of binary nucleon-nucleon collisions, nu, suffered by deuteron nucleons. A comparison of charged particle yields to those in p+p collisions show that yield per nucleon-nucleon collision saturates with nu for high momentum particles. We also present the charged hadron to neutral pion ratios as a function of p(T).
  •  
107.
  • Adler, S. S., et al. (creator_code:aut_t)
  • Centrality dependence of pi(0) and eta production at large transverse momentum in root s(NN) = 200 GeV d+Au collisions
  • 2007
  • record:In_t: Physical Review Letters. - 1079-7114. ; 98:17
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • The dependence of transverse momentum spectra of neutral pions and eta mesons with p(T) < 16 GeV/c and p(T) < 12 GeV/c, respectively, on the centrality of the collision has been measured at midrapidity by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider (RHIC) in d + Au collisions at root s(NN) = 200 GeV. The measured yields are compared to those in p + p collisions at the same root s(NN) scaled by the number of underlying nucleon-nucleon collisions in d + Au. At all centralities, the yield ratios show no suppression, in contrast to the strong suppression seen for central An + Au collisions at RHIC. Only a weak p(T) and centrality dependence can be observed.
  •  
108.
  • Adler, S. S., et al. (creator_code:aut_t)
  • Dense-medium modifications to jet-induced hadron pair distributions in Au+Au collisions at root(NN)-N-S=200 GeV
  • 2006
  • record:In_t: Physical Review Letters. - 1079-7114. ; 97:5
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • Azimuthal correlations of jet-induced high-p(T) charged hadron pairs are studied at midrapidity in Au+Au collisions at root s(NN)=200 GeV. The distribution of jet-associated partner hadrons (1.0 < p(T)< 2.5 GeV/c) per trigger hadron (2.5 < p(T)< 4.0 GeV/c) is found to vary with collision centrality, in both shape and yield, indicating a significant effect of the nuclear collision medium on the jet fragmentation process.
  •  
109.
  • Adler, S. S., et al. (creator_code:aut_t)
  • Detailed study of high-p(T) neutral pion suppression and azimuthal anisotropy in Au plus Au collisions at root s(NN) =200 GeV
  • 2007
  • record:In_t: Physical Review C (Nuclear Physics). - 0556-2813. ; 76:3
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • Measurements of neutral pion (pi(0)) production at midrapidity in root s(NN)=200 GeV Au+Au collisions as a function of transverse momentum, p(T), collision centrality, and angle with respect to reaction plane are presented. The data represent the final pi(0) results from the PHENIX experiment for the first RHIC Au+Au run at design center-of-mass energy. They include additional data obtained using the PHENIX Level-2 trigger with more than a factor of 3 increase in statistics over previously published results for p(T)>6 GeV/c. We evaluate the suppression in the yield of high-p(T) pi(0)'s relative to pointlike scaling expectations using the nuclear modification factor R-AA. We present the p(T) dependence of R-AA for nine bins in collision centrality. We separately integrate R-AA over larger p(T) bins to show more precisely the centrality dependence of the high-p(T) suppression. We then evaluate the dependence of the high-p(T) suppression on the emission angle Delta phi of the pions with respect to event reaction plane for seven bins in collision centrality. We show that the yields of high-p(T) pi(0)'s vary strongly with Delta phi, consistent with prior measurements 1,2. We show that this variation persists in the most peripheral bin accessible in this analysis. For the peripheral bins we observe no suppression for neutral pions produced aligned with the reaction plane, whereas the yield of pi(0)'s produced perpendicular to the reaction plane is suppressed by a factor of similar to 2. We analyze the combined centrality and Delta phi dependence of the pi(0) suppression in different p(T) bins using different possible descriptions of parton energy loss dependence on jet path-length averages to determine whether a single geometric picture can explain the observed suppression pattern.
  •  
110.
  • Adler, S. S., et al. (creator_code:aut_t)
  • Evidence for a long-range component in the pion emission source in Au plus Au collisions at root s(NN)=200 GeV
  • 2007
  • record:In_t: Physical Review Letters. - 1079-7114. ; 98:13
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • Emission source functions are extracted from correlation functions constructed from charged pions produced at midrapidity in Au+Au collisions at s(NN)=200 GeV. The source parameters extracted from these functions at low k(T) give first indications of a long tail for the pion emission source. The source extension cannot be explained solely by simple kinematic considerations. The possible role of a halo of secondary pions from resonance emissions is explored.
  •  
Skapa referenser, mejla, bekava och länka
  • navigation:Result_t 101-110 navigation:of_t 130
swepub:Mat_t
swepub:mat_article_t (128)
swepub:mat_researchreview_t (2)
swepub:Level_t
swepub:level_refereed_t (130)
swepub:Hitlist_author_t
Jia, J. (130)
Milov, A. (130)
Lebedev, A. (130)
Bathe, S. (130)
Buesching, H. (130)
deldatabas:search_more_t
Chujo, T. (130)
Glenn, A. (130)
Kwon, Y. (130)
Miake, Y. (130)
Newby, J. (130)
Esumi, S. (130)
Alexander, J (130)
Hong, B (130)
Akiba, Y. (130)
Bazilevsky, A (130)
Bumazhnov, V. (130)
Chiu, M (130)
Bassalleck, B (130)
Baublis, V (130)
Bunce, G (130)
Butsyk, S (130)
Cianciolo, V (130)
David, G (130)
Denisov, A (130)
Deshpande, A (130)
Drees, A (130)
Durum, A (130)
Franz, A (130)
Goto, Y (130)
Hayano, R (130)
Homma, K (130)
Ichihara, T (130)
Imai, K (130)
Ishihara, M (130)
Kurita, K (130)
Lacey, R (130)
Khanzadeev, A. (129)
Reygers, K. (129)
Samsonov, V. (129)
Sugitate, T. (129)
Tanaka, Y. (129)
Riabov, V. (129)
Watanabe, Y. (129)
Dietzsch, O (129)
En'yo, H (129)
Kistenev, E (129)
deldatabas:search_less_t
swepub:Hitlist_uni_t
swepub_uni:lu_t (130)
hitlist:Language_t
language:Eng_t (130)
hitlist:HSV_t
hsv:Cat_1_t (130)

hitlist:Year_t

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt tools:Close_t

tools:Permalink_label_t