Difference: DongHosLogHYDJETstudies (8 vs. 9)

Revision 92010-08-11 - DongHoMoon

META TOPICPARENT	name="DongHosLog"

Changed:

<
<

Quarikonia Study

>
>

Quarkonia in Hydjet Study

Quarkonia in Hydjet Study
- 1. Quarkonia Generation with HYJET

Changed:

<
<

1. Motivation of Quarkonia (qqbar -> +mu -mu, J/psi, Upsilon family) Study at CMS (Fig. 1)

>
>

1. Quarkonia Generation with HYJET

Deleted:

<
<

- Quarkonia's step-wise suppression at high pt region is the one of most direct probes of QGP (Quark-gluon-plasma)

- J/Psi's suppression is already observed in SPS and RHIC.

- So, how about it in CMS ? (there could be more huge suppression or enhanced regeneration ?) and how about Upsilon ?

What is more benefits of CMS than other experiments ?

- Increased energy : 5.5 TeV? (PbPb? collision) - 30 times more huge than RHIC (200 GeV? : AuAu?)

- It can make plasma hotter, longer-lived than RHIC (it can be easy to dissolute the particles which has large binding energy)

- provide good circumstances to produce Quarkonia highly

- high luminosities : 5*10^26 cm^-2 s^-1 (increase events rate)

- high gluon density at low-x, (the almost particles of heavy-flavor quarks is made by gluon-gluon fusion)

- New possibility of Upsilon family (Y, Y', Y'')

2. Quarkonia Generation with HYJET

31X HYDJET production information (updated at 20090608)

* decache location : dcache:/pnfs/cmsaf.mit.edu/hibat/cms/users/davidlw/HYDJET_Minbias_4TeV_31X/gen/

* 100k production by Wei at CMSSW_3_1_X

Jpsi_pt_distribution

2nd HYDJET production information

* decache location : /pnfs/cmsaf.mit.edu/t2bat/cms/store/user/davidlw/HYDJET_GEN_X2_MB_4.0TeV/HYDJET_GEN_X2_MB_4.0TeV/545444c24aba01a433ce34e4c379212c/

* 100k production by Wei, including more quarkonia

Analysis of quarkonia with CMSSW at CMSSW_2_1_x

- use 'HydQuarkoniaAnalyzer.ccHydQuarkoniaAnalyzer.cc'

1) pT distributions of J/psis

- the flat around 5 -10 GeV?/c doesn't feed down. This unexpected effect seems to be caused by the cases that the mother is J/psis themselves, chi_cs and color octet state. It is neccessary to check generation situation.

Mothers of J/psi

Mother (id)	Number of production	Status of Mother	Status of J/psi	Comment
None	20	21	21
J/psi (443)	3992	21	11
B0(+-511)	3133(3096)	11 or 12	11
B+(+-521)	3152(2927)	11	11
Bs0(+-531)	885(884)	11	11
B_c(+-541)	27(21)	11	11
chi_1c(20443)	3848	11	11
chi_2c(445)	407	11	11
chi_0c(10441)	17	11	11
Lambda_b0(+-5122)	618(577)	11	11
Xi_b-(+-5132)	23(19)	11	11
Xi_b0-(+-5132)	24(15)	11	11
Omega_b-(5332)	1	11	11
Cluster(91)	327	11	11	cluster fragmention (pQCD)
cc~(9900443)	3375	11	11	Color Octet system
cc~(9910441)	336	11	11	Color Octet system
cc~(9900441)	261	11	11	Color Octet system
Total J/psi	27985

- pT distribution of Upsilon from 100k hydjet minbias event.

Mothers of Upsilon

Mother (id)	Number of production	Status of Mother	Status of J/psi	Comment
None	34	21	21
Upsilon (553)	435	21	11
Chi_0b (10551)	8	11	11
Chi_1b (20553)	102	11	11
Chi_2b (555)	81	11	11
bb bar 1s (9900551)	32	11	11	Color Octet system
bb bar 3s (9900553)	364	11	11	Color Octet system
bb bar 3p (9910551)	5	11	11	Color Octet system
Cluster (91)	328	11	11	cluster fragmention (pQCD)
Total Upsilon	1084

2) pT distributions of muons from Kaons, B meson and J/psis

3) Dimuon mass continuum with muon combination

- use 'MuonCombiAnalyzer.cc' - in order to look into clear signal, the study was done separately 0-1 GeV?/c^2, 2 - 4 GeV?/c^2, 0 - 10 GeV?/c^2.

Mass range 0 - 10 GeV?/c^2

Mass range 0 - 1 GeV?/c^2

Mass range 2 - 4 GeV?/c^2

-- DongHoMoon - 27 Apr 2009

META FILEATTACHMENT	attachment="Fig01.jpg" attr="" comment="" date="1241010743" name="Fig01.jpg" path="D:\CMS 백업\2111_GenAna_Hydjet\Twiki pics\Fig01.jpg" size="47482" stream="D:\CMS 백업\2111_GenAna_Hydjet\Twiki pics\Fig01.jpg" user="Main.DongHoMoon" version="1"
META FILEATTACHMENT	attachment="Jpsi_From_mother.png" attr="" comment="" date="1241617139" name="Jpsi_From_mother.png" path="C:\root\20090403_Hydjet\Jpsi_From_mother.png" size="25217" stream="C:\root\20090403_Hydjet\Jpsi_From_mother.png" user="Main.DongHoMoon" version="2"
META FILEATTACHMENT	attachment="Muons_and_kaons_BtoJpsi.png" attr="" comment="" date="1241012423" name="Muons_and_kaons_BtoJpsi.png" path="C:\root\20090403_Hydjet\Muons_and_kaons_BtoJpsi.png" size="19318" stream="C:\root\20090403_Hydjet\Muons_and_kaons_BtoJpsi.png" user="Main.DongHoMoon" version="1"
META FILEATTACHMENT	attachment="muon_combination_0_10.png" attr="" comment="" date="1241018668" name="muon_combination_0_10.png" path="C:\root\20090403_Hydjet\muon_combination_0_10.png" size="14288" stream="C:\root\20090403_Hydjet\muon_combination_0_10.png" user="Main.DongHoMoon" version="1"
META FILEATTACHMENT	attachment="muon_combination_0_1_Gev.png" attr="" comment="" date="1241018753" name="muon_combination_0_1_Gev.png" path="C:\root\20090403_Hydjet\muon_combination_0_1_Gev.png" size="17951" stream="C:\root\20090403_Hydjet\muon_combination_0_1_Gev.png" user="Main.DongHoMoon" version="1"
META FILEATTACHMENT	attachment="muon_combination_2_4_Gev.png" attr="" comment="" date="1241023394" name="muon_combination_2_4_Gev.png" path="C:\root\20090403_Hydjet\muon_combination_2_4_Gev.png" size="16272" stream="C:\root\20090403_Hydjet\muon_combination_2_4_Gev.png" user="Main.DongHoMoon" version="1"
META FILEATTACHMENT	attachment="UpsilonFromMother2.png" attr="" comment="" date="1241642610" name="UpsilonFromMother2.png" path="C:\root\20090403_Hydjet\UpsilonFromMothers.png" size="15579" stream="C:\root\20090403_Hydjet\UpsilonFromMothers.png" user="Main.DongHoMoon" version="3"
META FILEATTACHMENT	attachment="21X_Hydjet_Jpsi_pt.png" attr="" comment="" date="1244468516" name="21X_Hydjet_Jpsi_pt.png" path="21X_Hydjet_Jpsi_pt.png" size="16087" stream="21X_Hydjet_Jpsi_pt.png" user="Main.DongHoMoon" version="1"
META FILEATTACHMENT	attachment="31X_Hydjet_Jpsi_pt.png" attr="" comment="" date="1244468619" name="31X_Hydjet_Jpsi_pt.png" path="31X_Hydjet_Jpsi_pt.png" size="13864" stream="31X_Hydjet_Jpsi_pt.png" user="Main.DongHoMoon" version="1"

View topic | History: r9 < r8 < r7 < r6 | More topic actions...

Copyright © by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding KoreaCmsWiki? Send feedback