jet analysis with pythia8
DESCRIPTION
jet analysis with pythia8. 2008 spring. Soft / Hard pp 200GeV. 5/6. settings. Hard : HardQCD:all=on only Soft : SoftQCD:all=on only : どちらも default で bMI : 単位は fm ではないらしい?. Hard pT. Soft pT. Hard energy. Soft energy. Hard eta. Soft eta. Hard rapidity. Soft rapidity. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/1.jpg)
jet analysis with pythia8
2008 spring
![Page 2: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/2.jpg)
![Page 3: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/3.jpg)
Soft / Hard pp 200GeV
5/6
![Page 4: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/4.jpg)
settings
• Hard : HardQCD:all=on only• Soft : SoftQCD:all=on only
• <pT>: どちらも default で• bMI : 単位は fm ではないらしい?
![Page 5: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/5.jpg)
Hard pT
![Page 6: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/6.jpg)
Soft pT
![Page 7: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/7.jpg)
Hard energy
![Page 8: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/8.jpg)
Soft energy
![Page 9: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/9.jpg)
Hard eta
![Page 10: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/10.jpg)
Soft eta
![Page 11: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/11.jpg)
Hard rapidity
![Page 12: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/12.jpg)
Soft rapidity
![Page 13: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/13.jpg)
bMI vs N_ch
Hard bMI vs N_chsoft bMI vs N_ch
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bMI vs <pT>
Hard bMI vs <pT>Soft bMI vs <pT>
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weekly meeting
5/20/2008
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correlation b/w Reaction Plane and phi direction of jet
14000GeV p+p collidionhardQCD:all=on
pTHatMin=200GeV
![Page 17: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/17.jpg)
計算方法1. trigger 粒子に対する Δφ の分布を Ntrig で
規格化する2. jet の center に対する Δφ 分布3.
から求めた RP に対する Δφ 分布€
Ψ=1
2arctan
sin 2φi( )i
∑
cos 2φi( )i
∑
⎛
⎝
⎜ ⎜ ⎜
⎞
⎠
⎟ ⎟ ⎟
![Page 18: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/18.jpg)
しきい値1. trigger 粒子と associate 粒子の |η|2. jet center と associate 粒子の |η|3. RP 決定のための粒子の |η| 、 associate 粒
子の |η|
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pT<3.0GeV for RP difinition
結果 1(RP 決定に使う粒子の pT の上限を決めた )
1,φ1-φ2 の分布 φjet vs RP3,RP に対する他の粒子の方位角分布
2,φjet に対する他の粒子の方位角分布
pT<2.0 GeV for RP difinitionpT<1.0GeV for RP difinitionpT<0.5 GeV for RP definition
相関は消えない
![Page 20: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/20.jpg)
結果 2(RP 決定のための粒子を |η|>? と |η|<1 の粒子分布 )
1,φ1-φ2 の分布 φjet vs RP3,RP に対する他の粒子の方位角分布
2,φjet に対する他の粒子の方位角分布
|η|>1 for RP definition|η|>1.5 for RP definition|η|>2 for RP definition|η|>2.5 for RP definition
相関は消えそう?
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pTHatMin=0
• ちなみに、 jet のほとんどないイベントについても調べてみましたが、2粒子相関はフラット、 RP-φ 分布もフラットとなりました。– 当然の結果かもしれませんが・・・
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quark jet? gluon jet?
•gluon jet?(brown)• ◯◯->gg = on ->qg , -> qq = off◯◯ ◯◯
•quark jet?(green)• ◯◯->qq = on ->qg , -> gg = off◯◯ ◯◯
jet の eT
jetの
粒子
数
このような認識で
あっているのでしょうか ??
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weekly meeting
052708
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jet correlation
trig:3GeV<pT, |η|<10associate:1GeV<pT<3GeV, |η|<10
2 粒子相関 jet に対するassociate 粒子の角度分布
![Page 25: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/25.jpg)
V2( みたいな量 IN PP)
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14000GeV
for particle shaping : |η|>1for associate particle selection : |η|<1
200,100,50,0
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1960GeV
for particle shaping : |η|>1for associate particle selection : |η|<1
100,50,0
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200GeV
50,0for particle shaping : |η|>1for associate particle selection : |η|<1
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v2 vs bMI について• 3 つ以上の jet があるとき方位角異方性は
弱く見積もられる• jet の数が少ないところでは jet の相関が
v2 に反映されている
pTHatMin=200GeV
jet数
bMI
![Page 30: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/30.jpg)
QUARK JET, GLUON JET
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先週の課題
• eT の小さいところを含めた quark jet, gluon jet multiplicityの違い
• MB と比べて、 <pT>min=200GeV の イベントは 2.6e-8
![Page 32: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/32.jpg)
z 分布14000GeV<pT>min=200GeVeTcut=200GeV
yiel
d
gluon jet のほうが発生粒子数が大きいため、 jet の eT に対する fraction は小さくなる傾向にある
![Page 33: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/33.jpg)
weekly meeting
052708
![Page 34: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/34.jpg)
jet correlation
trig:3GeV<pT, |η|<10associate:1GeV<pT<3GeV, |η|<10
2 粒子相関 jet に対するassociate 粒子の角度分布
![Page 35: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/35.jpg)
V2( みたいな量 IN PP)
![Page 36: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/36.jpg)
14000GeV
for particle shaping : |η|>1for associate particle selection : |η|<1
200,100,50,0
![Page 37: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/37.jpg)
1960GeV
for particle shaping : |η|>1for associate particle selection : |η|<1
100,50,0
![Page 38: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/38.jpg)
200GeV
50,0for particle shaping : |η|>1for associate particle selection : |η|<1
![Page 39: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/39.jpg)
v2 vs bMI について• 3 つ以上の jet があるとき方位角異方性は
弱く見積もられる• jet の数が少ないところでは jet の相関が
v2 に反映されている
pTHatMin=200GeV
jet数
bMI
![Page 40: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/40.jpg)
QUARK JET, GLUON JET
![Page 41: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/41.jpg)
先週の課題
• eT の小さいところを含めた quark jet, gluon jet multiplicityの違い
• MB と比べて、 <pT>min=200GeV の イベントは 2.6e-8
![Page 42: jet analysis with pythia8](https://reader036.vdocuments.pub/reader036/viewer/2022062321/56812acd550346895d8ea301/html5/thumbnails/42.jpg)
z 分布14000GeV<pT>min=200GeVeTcut=200GeV
yiel
d
gluon jet のほうが発生粒子数が大きいため、 jet の eT に対する fraction は小さくなる傾向にある