2011 QCD and High Energy Interactions - Rencontres de Moriond ...

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2. L.McLerranandR.D. Pisarski, Nucl. Phys.A796 (2007) 83. G. TorrieriandI.Mishustin, Phys. Rev. C 82 (2010) 055202. S. Lottini and G. Torrieri, arXiv:1103.4824 [nucl-th]. T. Kojo, Y. Hidaka, L. McLerran and R. D. Pisarski, Nucl. Phys. A 843 (2010) 37. C. Sasaki and I. Mishustin, Phys. Rev. C 82 (2010) 035204. 3. L. Bonanno and F. Giacosa, arXiv:1102.3367 [hep-ph]. 4. C. Amsler and N. A. Tornqvist, Phys. Rept. 389, 61 (2004). E. Klempt and A. Zaitsev, Phys. Rept. 454 (2007) 1. F. Giacosa, Phys. Rev. D 80 (2009) 074028. 5. Y. Nambu, G. Jona-Lasinio, Phys. Rev. 122, 345-358 (1961); Y. Nambu, G. Jona-Lasinio, Phys. Rev. 124, 246-254 (1961). 6. S. P. Klevansky, Rev. Mod. Phys. 64 (1992) 649. 7. M. Gell-Mann, M. Levy, Nuovo Cimento, 16, 705 (1960). S. Gasiorowicz, D. A. Geffen, Rev. Mod. Phys. 41, 531-573 (1969). 8. D. Parganlija, F. Giacosa, D. H. Rischke, Phys. Rev. D82, 054024 (2010). S. Gallas, F. Giacosa, D. H. Rischke, Phys. Rev. D82 (2010) 014004. S. Janowski, D. Parganlija, F. Giacosa and D. H. Rischke, arXiv:1103.3238 [hep-ph]. 9. J. D. Walecka, Annals Phys. 83, 491 (1974). B. D. Serot and J. D. Walecka, Adv. Nucl. Phys. 16, 1 (1986). B. D. Serot and J. D. Walecka, Int. J. Mod. Phys. E 6, 515 (1997). 10. R. L. Jaffe, Phys. Rev. D 15 (1977) 267. L. Maiani, F. Piccinini, A. D. Polosa and V. Riquer, Phys. Rev. Lett. 93 (2004) 212002 [arXiv:hep-ph/0407017]. F. Giacosa, Phys. Rev. D 74 (2006) 014028. F. Giacosa, Phys. Rev. D 75 (2007) 054007. A. H. Fariborz, R. Jora and J. Schechter, Phys. Rev. D 72 (2005) 034001. 11. A. Heinz, S. Struber, F. Giacosa and D. H. Rischke, Phys. Rev. D 79 (2009) 037502. S. Gallas, F. Giacosa and G. Pagliara, arXiv:1105.5003 [hep-ph]. 12. N. Kaiser, R. Brockmann and W. Weise, Nucl. Phys. A 625 (1997) 758. A. Calle Cordon and E. Ruiz Arriola, Phys. Rev. C 81 (2010) 044002. 13. C. Amsler and F. E. Close, Phys. Rev. D 53 (1996) 295. W. J. Lee and D. Weingarten, Phys. Rev. D 61, 014015 (2000). F. E. Close and A. Kirk, Eur. Phys. J. C 21, 531 (2001). F. Giacosa, T. Gutsche, V. E. Lyubovitskij and A. Faessler, Phys. Rev. D 72, 094006 (2005); Phys. Lett. B 622, 277 (2005). H. Y. Cheng, C. K. Chua and K. F. Liu, Phys. Rev. D 74 (2006) 094005. L. Bonanno and A. Drago, Phys. Rev. C 79, 045801 (2009). V. Mathieu, N. Kochelev and V. Vento, Int. J. Mod. Phys. E 18 (2009) 1. 14. Y. Chen et al., Phys. Rev. D 73 (2006) 014516. 15. D.H. Rischke, Prog. Part. Nucl.Phys.52(2004) 197. E.Megias, E. RuizArriola, L.L. Salcedo, Phys. Rev. D74, 065005 (2006). 16. J. M. Cornwall, R. Jackiw, E. Tomboulis, Phys. Rev. D10, 2428-2445 (1974). 17. J. Gasser, H. Leutwyler, Phys. Lett. B184, 83 (1987). 18. M. Cheng, N. H. Christ, S. Datta, J. van der Heide, C. Jung, F. Karsch, O. Kaczmarek, E. Laermann et al., Phys. Rev. D74 (2006) 054507. 19. A. Dumitru, R. D. Pisarski, Phys. Lett. B504 (2001) 282-290. 20. A. Heinz, F. Giacosa, and D. H. Rischke, in preparation.
Recent Results on Light Hadron Spectroscopy at BESIII Zhi Wu (for BESIII collaboration) 19B YuquanLu, Shijingshan District BeijingChina, 100049 Using about 226 × 10 6 J/ψ events and 106 × 10 6 ψ ′ events accumulated with BESIII detector operating at BEPCII e + e − collider, the existence of pp mass threshold enhancement and X(1835) is confirmed. Two resonances, X(2120) and X(2370) are first observed in J/ψ → γη ′ π + π − . In the study of J/ψ → ωηπ + π − , a narrow structure denoted as X(1870) is seen with a significance of 7.1σ. In addition, a direct measurement of f0(980) → a 0 0(980) and a 0 0(980) → f0(980) mixing transitions is presented to probe the nature of the two scalar states. 1 BESIII and BEPCII BEPCII/BESIII 1 is a major upgrade of the BEPC accelerator and BESII detector. The primary physics purposes are aimed at the study of hadron spectroscopy and τ-charm physics. The analysis reported here are based on the data samples of 226 × 10 6 J/ψ and 106 × 10 6 ψ ′ events. 2 Confirmation of pp Mass Threshold Enhancement An anomalously strong pp mass threshold enhancement was first observed by BESII experiment in the radiative decay of J/ψ → γpp 2 in 2003. A fit with an S-wave Breit-Wigner resonance function indicates that the peak mass is at M = 1859 +3 −10 (stat.)+5 −25 (sys.) MeV/c2 , and the total width is Γ < 30MeV/c 2 (at the 90% C.L.). One intriguing feature of this enhancement structure is that the corresponding structures are absent in the relative channels, including Bmeson decays 3 , radiative decays of ψ ′ 4 and Υ 5 , and the decay of J/ψ → ωpp 6 . These negative observations disfavor the interpretation of pure final state interaction(FSI). Fig. 1 shows the fitting results of pp mass spectrum in ψ ′ → π + π−J/ψ(γpp) and the threshold enhancement structure can be observed. The mass of fitted resonant parameters are M = 1861 +6 −13 (stat.)+7 −26 (sys.) MeV/c2 , and the total width is Γ < 38MeV/c2 at the 90% C.L..
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2011 QCD and High Energy Interactio
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Proceedings of the XLVIth RENCONTRE
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2011 RENCONTRES DE MORIOND The XLVI
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Foreword Contents 1. Higgs Searches
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1. Higgs
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95% CL Limit/SM 10 1 Tevatron Run I
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Events/5 GeV 6 10 5 10 4 10 3 10 2
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Events / 0.5 CDF Run II Preliminary
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For the most sensitive sub-channel
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Table 1: Table listing the various
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various SM Higgs mass hypotheses. T
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constraints on parameters are given
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Figure 2: Invariant mass of the ele
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Figure 4: CDF Exclusion limits for
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Table 1: Main phases of 2010 commis
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Table 4: Parameter list for early (
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luminosity of 1.2×10 33 cm −2 s
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2 QCD Analysis settings HERA PDFs a
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min 2 - 2 20 15 10 5 0 H1 and ZEUS
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SM σ / σ 95% CL Limit on 3 10 2 1
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NNLO σ/ σSM 95% CL Upper Bound on
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the report of this working group. I
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2.3 The impact of different PDF par
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SUSY Searches at the Tevatron Ph. G
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on the quality (loose or tight) and
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SUSY searches at ATLAS N. Barlow, o
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channel. These results are combined
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Figure 2: The top left plot shows t
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2010 data. Analysis techniques for
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as main discriminator between event
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sign leptons is particularly intere
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N of events 5 10 DATA 10 4 3 10 10
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) [pb] ν e → B(W’ × σ 10 1 -
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2 Searches in the dijet final state
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ing that the neutrinos were the onl
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The Quasi-Classical Model in SU(N)
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g (γ µ kµ) γ µ Aa µ g (pk)
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3. Top
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of their vertex with respect to the
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of about 9%. 3.1 Differential Cross
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Figure 5: Summary of most recent CD
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the minimum number of jets identifi
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where f’s are probability functio
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hood technique, with a simultaneous
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momentum direction of the b quark f
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Events 200 150 100 50 -1 DØ L=5.4
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after all corrections in the M t¯t
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for prompt J/ψ under the fully tra
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2 Events / 20 MeV/c 50 40 30 20 10
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ATLAS - consists of four parts (mon
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5 D mesons High cross-sections of D
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μ +X') [nb/GeV] → b+X → (pp T
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GeV) μ |
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HEAVY FLAVOUR IN A NUTSHELL Robert
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Figure 1: Overlapping constraints o
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Figure 3: Constraints on new physic
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RECENT B PHYSICS RESULTS FROM THE T
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(IP) distributions are fitted separ
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decays CDF extracts Using a 5.94 fb
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Search for B 0 s → µ+ µ − and
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Ref. 10,11 . The expected GL distri
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IN PURSUIT OF NEW PHYSICS WITH B DE
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τK + K −/τBs 1.01 1.00 0.99 0.9
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CHARMLESS HADRONIC B-DECAYS AT BABA
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surements (fL ∼ 0.5). Several att
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Estimating the Higher Order Hadroni
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the resulting exponent suggests to
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The counterpart of the ground-state
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(a) Tree level signal decay b ¯Bs
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the B0 d system LHCb profits from i
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This result is based on averaging o
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y non-perturbative effects. Using t
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e M(Dπ) distributions obtained D +
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CHARM PHYSICS RESULTS AND PROSPECTS
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LHCb is working towards its first m
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Two body hadronic D decays Yu Fushe
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where the effective coefficients aA
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6. J. J. Sakurai, Phys. Rev. 156, 1
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states: 6π, 2K4π, 4K2π, KSK3π 1
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egion of X(3872), which corresponds
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Figure 1: The π 0 recoil mass spec
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η → π + π − π 0 η ′ →
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conservation. This second principle
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many of them come from gluon nonper
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Latest Jets Results from the Tevatr
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in for the inclusive trijet event s
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RECENT RESULTS ON JETS FROM CMS F.
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dy (pb/GeV) /dp 2 d 10 10 10 9 10
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RECENT RESULTS ON JETS WITH ATLAS G
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| y| < 0.3 ATLAS Preliminary 2.1 <
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EPOS 2 and LHC Results TanguyPierog
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positions are randomly distributed
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ABOUT THE HELIX STRUCTURE OF THE LU
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Figure 2: Left: Correlations betwee
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Improving NLO-parton shower matched
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due to the inclusion of higher orde
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New Results in Soft Gluon Physics C
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Figure 2: Spacetime depiction of Dr
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Central Exclusive Meson Pair Produc
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in the CEP cross section. However i
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AN AVERAGE b-QUARK FRAGMENTATION FU
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1/N dN/dx 3.5 3 2.5 2 1.5 1 0.5 ALE
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W + W + jj at NLO in QCD: an exotic
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Σ fb Σ fb 3.5 3.0 2.5 2.0 0.65 0.
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W/Z+Jets and W/Z+HF Production at t
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Page 227 and 228: W/Z + Jets results from CMS V. CIUL
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Page 231 and 232: TEVATRON RESULTS ON MULTI-PARTON IN
Page 233 and 234: iterative midpoint cone algorithm w
Page 235 and 236: INVESTIGATIONS OF DOUBLE PARTON SCA
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Page 239 and 240: Figure 4: Two-dimensional distribut
Page 241 and 242: SOFT QCD RESULTS FROM ATLAS AND CMS
Page 243 and 244: as a function of multiplicity for t
Page 245 and 246: Determination of αS using hadronic
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Page 249 and 250: Reaching beyond NLO in processes wi
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Page 253 and 254: Nonlocal Condensate Model for QCD S
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Page 257 and 258: AN ALTERNATIVE SUBTRACTION SCHEME F
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Page 265 and 266: HOLOGRAPHIC DESCRIPTION OF HADRONS
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Page 281 and 282: STUDY OF Ke4 DECAYS IN THE NA48/2 E
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Page 285: 6. Structure Functions Diffraction
Page 288 and 289: 2 Hadronic Final States and Diffrac
Page 290 and 291: 3 Summary A brief overview of recen
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Page 297: The singular term, on the other han
Page 301 and 302: Pomeron Kernel: The leading order B
Page 303 and 304: DIFFRACTION, SATURATION AND pp CROS
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Page 311: 7. Heavy Ions
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Figure 1: (a) J/ψ rapidity distrib
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lower x, or forward rapidity one ex
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φ ∆ /d assoc dN trig 1/N 0.5 0.4
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AA,Pythia I 2.5 2.0 1.5 1.0 0.5 0.0
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(1/N ) dN/dA evt J φ Δ ) dN/d (1/
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[GeV] Tower ET Σ 50 45 40 35 30 25
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3 Results 3.1 Dijet Properties in p
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(GeV/c) (GeV/c) T T p < 40 20
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wheredσm(N +N → h+X)/dp Tdy isth
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R AA 0.6 0.5 0.4 0.3 0.2 0.1 0 0.5
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Here D is the diffusion coefficient
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The effect of triangular flow in je
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When both trigger and associated pa
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The first Z boson measurement in th
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Figure 1: Dimuon invariant mass spe
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2. V. Kartvelishvili, R. Kvatadze a
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esolution [ µ m] ! r 0 d 300 250 2
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Figure 5: Differential transverse m
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Figure 1: Average nuclear modificat
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Another way of using direct photons
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Pb R g 2 Nuclear Modifications for
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q T 1/R AA 1.6 1.4 1.2 1 0.8 LO Fra
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] 2 > [g/cm max
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Methods (a) and (c) constrain the e
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EXPERIMENTAL SUMMARY: ENTERING THE
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ut also for valence quarks involved
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The sensitivity to Standard Model H
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Figure 10: Top pair mass spectrum m
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Figure 13: Particle densities (left
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4 Low energy precision Spectroscopy
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asymmetries associated to Bd and Bs
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XLVIth Rencontres de Moriond QCD an
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