Quarkonia Production in p+p, d+Au and A+A from PHENIX Melynda Brooks Los Alamos National Laboratory For the PHENIX Collaboration Melynda Brooks, LANL,

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Quarkonia Production in p+p, d+Au and A+A from PHENIX Melynda Brooks Los Alamos National Laboratory For the PHENIX Collaboration Melynda Brooks, LANL, WWND

2 Heavy Flavor Production D mesons,  ’,  Possible Modifications beyond p+p production extrapolation: Parton Distribution Functions modified in nucleus? Energy loss of partons traversing nucleus Cronin modification of p T spectra Breakup of charmonium before exiting nucleus Energy loss of partons traversing QGP Debye screening of charmonia by QGP If enough cc, can have charmonium production through coalescence Factorize calculations: pQCD to calculate cc production cċ propagation and hadronization Note: much of J/  production comes from feed-down from higher resonances, B c ċ Note heavy flavor kinematics differences

3 Melynda Brooks, LANL, WWND 2015 Upsilon Charmonia plus upsilon states covers large range of binding energies which can give indication of whether screening is occurring or not

4 Melynda Brooks, LANL, WWND 2015 The PHENIX Detector Muon Arms: , J/    +  - D  X+  Adding FVTX:  ’   +  - D, B Central Arms: , J/ ,  ’  e + e - D  X+e d, Cu, Au Au x≈5x10 -3 Shadowing region x≈8x10 -2 Anti-shadowing region e+e+ e-e- ++ --

5 Melynda Brooks, LANL, WWND 2015 PHENIX Data Sets p+p (200 and 510 GeV) J/ ,  ’,  at central and forward rapidities d+Au (200 GeV) J/ ,  ’,  c,  at central rapidity J/  at forward/backward rapidities Cu+Cu, Cu+Au, (200 GeV), Au+Au (39, 62, 200 GeV) CuCu J/  R AA at forward/backward rapidities CuAu J/  R AA at forward/backward rapidities AuAu J/  R AA at central and forward rapidities AuAu J/  R cp at 39, 62, 200 GeV, forward rapidities CuAu, AuAu  ’ at forward rapidities analysis underway AuAu  at central rapidity

6 Melynda Brooks, LANL, WWND 2015 J/  in d+Au Collisions: Cold Nuclear Matter Effects In d+Au collisions, rapidity-dependent R dA Forward rapidity shows more suppression than central/backward rapidities. Centrality-dependent. Possible explanations: gluon shadowing, nuclear breakup, energy loss R dA = dN/dy dAu dN/dy pp *N coll

7 Melynda Brooks, LANL, WWND 2015 We do not see x 2 scaling, which would be indicative of gluon shadowing Initial-state energy loss and final-state effects? However,

8 Melynda Brooks, LANL, WWND 2015 PHENIX:  ’ suppressed more than J/  at central rapidity, in d+Au. Time spent in nucleus (breakup) does not hold as explanation for PHENIX data. Universal trend with dN ch /d  for several systems, up to 200 GeV Alice p-Pb data also seems consistent with this trend Comparing CNM for J/ ,  ’ Breakup by nucleus

9 Melynda Brooks, LANL, WWND 2015 Comparing CNM for J/ ,  ’ Would like to more fully explore the trend with dN ch /d , but current data are limited (see below) New p+A and heavy ion data from forward rapidity will expand our coverage at RHIC Vertex Detectors allow us to explore trend versus event multiplicity

10 Melynda Brooks, LANL, WWND 2015 PHENIX has a first J/  :  ’ result at forward rapidity from p+p 510 GeV FVTX detector allows separation of J/  and  ’ Heavy Ion analysis underway. p+A data set coming. J/  :  ’ at Forward Rapidity

11 Melynda Brooks, LANL, WWND 2015 pA Projections for Quarkonia Expect J/  measurements of significance for several nuclei p+Au will provide a good statistical measurement of  ’ p+A projections for Run 15

12 Melynda Brooks, LANL, WWND 2015 CNM for Open and Closed Heavy Flavor Open heavy flavor shows a different rapidity dependence from J/  arXiv: PRC 87, PRL 109, PRC 87, arXiv: PRC 87, EPS09 Combination of initial-state and final-state effects or primarily final-state? The FVTX will allow more precise measurement to better quantify differences from Run 15 p+A d Au

13 Melynda Brooks, LANL, WWND 2015 What About Upsilons? Possible suppression at backward rapidity (but error bars large) Forward rapidity may or may not be suppressed Challenging to make significantly better measurements with PHENIX. sPHENIX proposes to continue upsilon program.

14 Melynda Brooks, LANL, WWND 2015 System Size and CNM Suppression similar for smaller systems (CuCu) and larger (AuAu). Close to value extrapolated from dAu (modified PDF and breakup) Small rapidity dependence in CuAu, more consistent with CNM effects than QGP

15 Melynda Brooks, LANL, WWND 2015 J/  Heavy Ion Measurements J/  suppression strikingly similar at SPS and RHIC despite different energies Rapidity dependence not initially expected: CNM effects bring forward down? Coalescence brings central up? p T dependence does not show a strong effect PRL 98 (2007)

Energy Dependence Cont’d Explore energy dependence more at RHIC Don’t see large change in suppression until LHC Melynda Brooks, LANL, DNP Hawaii p T dependence now looks consistent with coalescence picture

17 Melynda Brooks, LANL, WWND 2015 Heavy Ion  ’:J/  At LHC energies, the J/  :  ’ ratio also seems to now deviate from linear trend. Another indication of coalescence atLHC? What will we see in RHIC heavy ion?

18 Melynda Brooks, LANL, WWND 2015 Upsilon Au-Au R AA ~0.65 if no 2S, 3S R AA ~0.37 if no 2S, 3S,  B PHENIX consistent with 2S, 3S states both melt, if no other suppression effects arXiv:

19 Melynda Brooks, LANL, WWND 2015 What’s Next at PHENIX? J/  :  ’ ratio in CuAu and AuAu at forward rapidity – will we see any  ’? J/  :  ’ ratio in p+A at forward and backward rapidity – will it follow same dN ch /d  trend? J/  :  ’ ratio versus multiplicity Higher precision open heavy flavor, B/D separation CuAu J/ ,  ’

20 Melynda Brooks, LANL, WWND 2015 Summary Significant suppression of J/  in d-Au; x 2 dependence  suppression not from gluon shadowing Extrapolation to heavy ion similar to what is measured except perhaps central AuAu  what might QGP suppression be? Can we reduce extrapolation errors?  ’ suppressed beyond J/  in d+Au, proportional to dN ch /d  independent of energy  co-mover type effect, not nuclear medium? J/  suppression in heavy ion: similar N part trend across energies, system-size until LHC where suppression is reduced  recombination? How much of J/  suppression might be due to QGP effects? Does  ’ survive in heavy ion collisions at RHIC?