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CERN Summer Student Programme 2019 ཧຍሗ࿌䝤䝸䝔䜱䝑䝅䝳䝁䝻䞁䝡䜰኱Ꮫಟኈ 1 ᖺⱝ㻌 ஭㻌 㻌 ⨾㻌 ᕹmiho@phas.ubc.ca
2019 ᖺ 10 ᭶ 10 ᪥୙ኚ㉁㔞ศᕸ䛾ᶆ‽ᶍᆺ䛛䜙䛾೫ᕪ䜢ぢ䛶㻘㻌 䝠䝇䝖䜾䝷䝮䛾䛂ᑿ

1 ࡣࡌࡵ࡟㒊䛃䛻ὀ┠䛩䜛䛣䛸䛷ほྍ⬟䛺⠊ᅖෆ䛷᪂䛧䛔≀⌮䛜⌧䜜ጞ㻌 2019 ᖺ䛾 6 ᭶ 24 ᪥䛛䜙 8 ᭶ 28 ᪥䜎䛷䛾 10 㐌㛫㻘㻌 䝇䜲䝇䛾䜑䜛⑞㊧䜢ぢ䜛䛣䛸䛜䛷䛝䜛䚹㻌 ATLAS 䛷䛿௨๓㻘㻌 di-muon 䛚䜘䝆 䝳 䝛 䞊 䝤 䛻 ఩ ⨨ 䛩 䜛 㧗 䜶 䝛 䝹 䜼 䞊 ◊ ✲ ᡤ 䛾 CERN 䛷䜃 di-electron ஦㇟㻘㻌 䜎䛯 di-jet ஦㇟䛻ᑐ䛧䛶㠀ඹ㬆᥈⣴䜢⾜䛳

Summer Student Programme 䛻ཧຍ䛧䛯䚹㻌 300 ே㏆䛟䛾Ꮫ⏕䛜䛯䛜㻘㻌 di-tau 䛿௒ᅇ䛜ึ䜑䛶䛷䛒䛳䛯䚹㻌 䛥䜙䛻㻘㻌 ➨ 3 ୡ௦䛿௚ୡ⏺୰䛛䜙㞟䜎䜚㻘㻌 ㅮ⩏䜢ཷ䛡䛺䛜䜙◊✲䛻ບ䜏㻘㻌 ᐦᗘ䛾⃰䛔䛾ୡ௦䜘䜚㔜䛔㉁㔞䜢ᣢ䛱㻘㻌 䛧䛯䛜䛳䛶䝠䝑䜾䝇⢏Ꮚ䛸ᙉ䛟⤖ྜ᫬㛫䜢㐣䛤䛧䛯䚹㻌 ⚾䛿 ATLAS ᐇ㦂䛾ᶆ‽ᶍᆺ䜢㉸䛘䜛≀⌮䛩䜛䛣䛸䛛䜙 ATLAS 䛻䛸䛳䛶䛿㔜せ䛺஦㇟䛸⪃䛘䜙䜜䜛䚹㻌 䜒䛧䛾◊✲䛾 1 䛴䛷䛒䜛㠀ඹ㬆 di-tau ⏕ᡂ䛾ゎᯒ䛾◊✲䛻ᚑ஦䛧ATLAS 䛷 di-tau ஦㇟䛜ぢ䜙䜜䜛䛾䛺䜙䜀㻘㻌 䛹䛾䜘䛖䛺≉ᚩ䜢䛯䚹㻌 ◊✲ෆᐜ䛸 CERN 䛷䛾⏕ά䜢ሗ࿌䛩䜛䚹㻌ᣢ䛳䛯䜒䛾䛺䛾䛛䜢䝅䝭䝳䝺䞊䝅䝵䞁䜢⏝䛔䛶Ⰽ䚻䛺ゅᗘ䛛䜙◊✲䛧䛯䚹㻌 ಙྕ஦㇟㻘㻌 䜎䛯⫼ᬒ஦㇟䛾䝰䞁䝔䜹䝹䝻䝕䞊䝍䛿䛩䜉䛶✚ศ䝹䝭䝜䝅䝔䜱䛜 139㻌 fb �䠍 䛷䛒䜛 Run−2 䝕䞊䝍䛸ྠ䛨䛻㸰 άືෆᐜ䛺䜛䜘䛖䝇䜿䞊䝹䛥䜜䛶䛔䜛䚹㻌

2.1 ㅮ⩏
㻌 䝥䝻䜾䝷䝮䛾᭱ึ䛾 5 㐌㛫䛿ẖ᪥༗๓୰䛻ㅮ⩏䛜㛤䛛䜜䛯䚹Ꮫ⏕䛾ᵝ䚻䛺䝞䝑䜽䜾䝷䜴䞁䝗䜢⪃៖䛧㻘㻌 ⣲⢏Ꮚ≀⌮䛰䛡䛷䛺䛟䝋䝣䝖䜴䜵䜰䜔་⒪≀⌮䜎䛷ᖜᗈ䛔ෆᐜ䛷ㅮ⩏䛜⾜䜟䜜䛯䚹㻌≉䛻 FCC 䜔 ILC 䛻䛴䛔䛶䛿Ꮫ⏕䛾ከ䛟䛜㆟ㄽ䜢䛧㻘㻌 䛹䛱䜙䛜
CERN 䛻䛸䛳䛶Ⅽ䛻䛺䜛䛾䛛䛺䛹㻘㻌 ᮍ᮶䜢ぢᤣ䛘䛯⇕ᘚ䜢䛧䛯䚹
CERN 䛷䛾ᖜᗈ䛔◊✲ෆᐜ䜢ヲ䛧䛟Ꮫ䜉䛯Ⰻ䛔ᶵ఍䛸䛺䛳䛯䚹㻌
2.2 ◊✲㻌 ⚾䛿 ATLAS ᐇ㦂䛾 exotics group 䛾ゎᯒ䝏䞊䝮䛻ᡤᒓ䛧㻘㻌 䝸䞂䜯䝥䞊䝹኱Ꮫ䛾 Dr. Carl Gwilliam 䛸 Prof. Monica D’Onofrio䛾ඖ䛷 ATLAS ᐇ㦂䛾 di-tau ஦㇟䛾ឤᗘ䛾◊✲䛻㛵䜟䛳䛯䚹㻌ᅗ 1㻌 㠀ඹ㬆䛸ඹ㬆䛾䝠䝇䝖䜾䝷䝮䛾㐪䛔䚹

2.2.1 ᴫせᶆ‽ᶍᆺ䛿⌧ᅾ䛾⣲⢏Ꮚ≀⌮䛾⌮ㄽ䜢 1 䛴䛻䜎䛸䜑䛯ᶍᆺ䛸

2.2.2 ಙྕ஦㇟䛺䛳䛶䛔䜛䛜, ⮬↛⌧㇟䜢᏶඲䛻ㄝ᫂䛷䛝䛺䛔䜿䞊䝇䛜ከ䛟䛒㻌 ◊✲䜢䛧䛶䛔䛯ಙྕ஦㇟䛿㻘㻌 ᭱⤊ⓗ䛻 2 䛴䛾䝍䜴⢏Ꮚ䛜⏕ᡂ䜛䚹 ATLAS 䛷䛿, 䛭䛾⌮ㄽ䛸⮬↛⌧㇟䛾㐪䛔䜢ㄝ᫂䛩䜛Ⅽ䛾䛥䜜䜛᥋ゐ┦஫స⏝䛾஦㇟䛷䛒䜛䚹㻌 䛥䜙䛻㻘㻌 ಙྕ஦㇟䛸⫼ᬒ஦㇟䜢Ⓨぢ䛩䜉䛟, ከ䛟䛾ゎᯒ䛜⾜䜟䜜䛶䛔䜛䚹 䛭䛾䛖䛱䛾 1஦㇟䛜ᘓタⓗ㻘㻌 ┦ẅⓗ䛻ᖸ΅䛧㻘㻌 ␗䛺䜛ឤᗘ䜢♧䛩䛣䛸䛛䜙䛣䛴䛜㝧Ꮚ䛸㝧Ꮚ䜢⾪✺䛥䛫䛯᫬䛻 2 䛴䛾䝍䜴⢏Ꮚ䛜⏕䜏ฟ䛥䜜䜜䜙䛾㐪䛔䜒◊✲䛧䛯䚹㻌 ྑᕳ䛝㻘㻌 ᕥᕳ䛝䛸䜹䜲䝷䝸䝔䜱䛻䛚䛔䛶䜛 di-tau ஦㇟䛷䛒䜛䚹 䝍䜴⢏Ꮚ䛿➨ 3 ୡ௦䛾䝺䝥䝖䞁⢏Ꮚ䛷䛒䜒⤌䜏ྜ䜟䛫䛜䛒䜛䛯䜑㻘㻌8 䛴䛾␗䛺䜛䜹䜲䝷䝹ᵓ㐀䜢⪃ᐹ䛧䛯䚹㻌䜚, ㏆ᖺ B factory 䛾◊✲⤖ᯝ䛜➨ 3 ୡ௦䛾⢏Ꮚ䛻᪂䛧䛔≀⌮䛜Ꮡᅾ䛩䜛䛣䛸䜢♧၀䛧䛶䛔䜛Ⅽ[1], ௒ᅇ䛿䝝䝗䝻䞁ⓗ䛻ᔂቯ㠀ඹ㬆᥈⣴䛷䛒䜛䛣䛸䛛䜙㻘㻌 䜶䝛䝹䜼䞊䝇䜿䞊䝹䛾Λ䜢 1 TeV㻌䛩䜛䝍䜴⢏Ꮚ䛻╔║䛧䛯䚹 䜎䛯, ᪂ࡋ࠸≀⌮ࡀ⏕ᡂࡉࢀࡿ࢚ࢿ䛿୺䛻᥋ゐ┦஫స⏝䛾 s 䝏䝱䞁䝛䝹ᅗ䜢᥈⣴䛧䛯䛜㻘㻌 䝯䝕䜱

䛛䜙㻌 30 TeV㻌 䛻タᐃ䛧㻘㻌 ឤᗘ䛾◊✲䜢⾜䛳䛯䚹㻌 ௒ᅇ䛾◊✲䛷ࣝࢠ࣮ࡢࢫࢣ࣮ࣝࡀ LHC ㉁㔞୰ᚰ࢚ࢿࣝࢠ࣮ࡼࡾࡶ㧗࠸ሙ䜶䞊䝍䞊䛜䝺䝥䝖䜽䜷䞊䜽䛻䛺䜛 t 䝏䝱䞁䝛䝹ᅗ䜒ᑗ᮶䛿᥈⣴䛩ྜࡢ㠀ඹ㬆᥈⣴࡟ᑐࡍࡿ㛵ᚰࡀ㧗ࡲࡗ࡚࠸ࡿࠋ㠀ඹ㬆᥈⣴䜛ྍ⬟ᛶ䛜䛒䜛䚹㻌䛷䛿⢏Ꮚ䜢┤᥋ほ㻌䛩䜛䛣䛸䛿䛷䛝䛺䛔䛜㻘㻌 ᅗ 1 䛷䜟䛛䜛䜘䛖䛻

502862.2.3 ⫼ᬒ஦㇟䛣䜜䜙䛾ኚᩘ䛾᭷ពᛶ䛿㻘㻌 ಙྕ஦㇟䛾ᩘ䜢ྲྀ䜚㻘㻌 䛭䜜䜢⫼ᬒ஦ ⫼ᬒ஦㇟䛿௨ୗ䛷䛒䜛䚹㇟䛾⥲ᩘ䛾ᖹ᪉᰿䛷๭䛳䛯ᛶ⬟ᣦᩘ㻌 㻔figure of merit㻕㻌 䜢⏝䛔 • Z → ee + jets • W → τν + jets • tt → bb� W � W � → bb� τ� τ� νν�䛶ホ౯䛧䛯䚹㻌
㻌 ᅗ 2 䛷♧䛧䛶䛔䜛䛾䛿୙ኚ㉁㔞䛾䝠䝇䝖䜾䝷䝮䛷䛒䜛䚹㻌 ⫼ᬒ஦㇟䛜ሬ䜚䛴䜆䛥䜜䛯䜒䛾䛷䛒䜚㻘㻌 ㉥䛔⥺䛜ಙྕ஦㇟䛾ឤᗘ䜢⾲ • Z → τ� τ� + jets • qq/gg/qg (multi-jets)

䛧䛶䛔䜛䚹㻌 ಙྕ஦㇟䛾୙ኚ㉁㔞䛜ୖ䛜䜛䛻䛴䜜ᛶ⬟ᣦᩘ䛜Ⰻ⫼ᬒ஦㇟䛿 Z 䝪䝋䞁㻘㻌 W 䝪䝋䞁䛺䛹䛾ᔂቯ䛻䜘䜛஦㇟䛜䜋䛸䜣䛭䛾ඹ㬆䛾ጞ䜎䜚䛷䛒䜛䛂ᑿ㒊䛃䛜ぢ䛘䜛≧ែ䛷䛒䜛䚹㻌 䛥䜙䛻㻘㻌䛹䛷䛒䜚㻘㻌 ၏୍᏶඲䛻᰿⤯䛩䜛䛣䛸䛾䛷䛝䛺䛔⫼ᬒ஦㇟䛿 Z 䝪ᘓタⓗᖸ΅䜘䜚䜒㻘㻌 ┦ẅⓗᖸ΅䛾᪉䛜ឤᗘ䛜䜘䛟㻘㻌 䛣䜜䛿௨๓䝋䞁䛛䜙䝍䜴⢏Ꮚ䛜 2 䛴⏕ᡂ䛥䜜䜛஦㇟䛷䛒䜛䚹 䛭䛾௚䛾஦㇟⾜䜟䜜䛯 di-lepton 䛾ゎᯒ⤖ᯝ䛸཯ᑐ䛾⤖ᯝ䛜ฟ䛯䚹㻌 䛥䜙䛻ᛶ䛿䛩䜉䛶㐺ษ䛺஦㇟㑅ู䜢䛩䜛䛣䛸䛻䜘䛳䛶ῶ䜙䛩䛣䛸䛜䛷䛝䜛䚹⬟ᣦᩘ䜢㧗䜑䜛Ⅽ㻘㻌 cos (� ∗ )䛭䛧䛶�䜒ྵ䜑䛯ゎᯒ䜢㐍䜑䛯䚹㻌

2.2.4 ゎᯒࣇ࣮࣒࣮ࣞ࣡ࢡ

Entries / 1 GeV䛟䛺䛳䛶䛔䛟≧ែ䛿㻘㻌 ඹ㬆䛜 LHC 䛻䛚䛡䜛ឤᗘ⠊ᅖ䜢㉸䛘䜛Ⅽ㻘㻌㻌 ゎᯒ䛿䛩䜉䛶 ATLAS SUSY Simple Analysis Framework 䛸䛔䛖䝣䝺䞊䝮䝽䞊䜽䜢౑䛔㻘㻌 䝙䝳䞊䝖䝸䝜䛺䛹䛾ぢ䛘䛺䛔⢏Ꮚ䜢⪃CI Left-Right Const
BG ttbar
BG ZeeBG Ztautau
BG QCD jets
BG Wtaunu
Sig  = 20 TeV

710

610510៖䛧䛺䛔 visible tau 䛾஦㇟෌ᵓ⠏䜢⾜䛺䛳䛯䚹 䛥䜙䛻㻘㻌 ᳨ฟჾ410

䛾 smearing 䜔㻘㻌 䝆䜵䝑䝖䛜䝍䜴⢏Ꮚ䛻ぢ䛘䜛ሙྜ䛾ഇ䝍䜴⢏Ꮚ

310䛺䛹䜒⪃៖䛧䛯᳨ฟჾ䛾཯ᛂ䜒ゎᯒ䛻ྲྀ䜚ධ䜜䛯䚹

102
ATLAS

102.2.5 ஦㇟㑅ู-11㻌 ◊✲䛾⤖ᯝ㻘㻌 ᭱㐺䛺஦㇟㑅ู䛿௨ୗ䛻䛺䛳䛯䚹1x䝝䝗䝻䞁ⓗ䛻ᔂቯ䛩䜛䝍䜴⢏Ꮚ䛾ᩘ䛜 2 ௨ୖx

B-jet 䛾ᩘ䛜 0x

MET Significance 䛜 3.5 GeV � ௨ୗ100�

500

1000

1500

2000

2500
3000
InvM [GeV]

Figure of Merit
S/ Bx

Work in Progresss = 13 TeV, 139 fb䜶䝛䝹䜼䞊್䛜㧗䛔᪉䛾䝍䜴⢏Ꮚ䛾 Transverse Momentum 䛜 40 GeV/c ௨ୖ

2.5
2
1.5
10.50

Glob Sig = 3.117

500

1000

1500

2000

2500

3000

InvM [GeV]䝍䜴⢏Ꮚ䛿䝺䝥䝖䞁ⓗ䛻䜒䝝䝗䝻䞁ⓗ䛻䜒ᔂቯ䛩䜛䛣䛸䛜䛷䛝䜛䛜㻘㻌䝝䝗䝻䞁ⓗ䛺䝍䜴⢏Ꮚ䛧䛛ᢅ䜟䛺䛔䛯䜑㻘㻌 䝝䝗䝻䞁ⓗ䛺䝍䜴⢏Ꮚ䛾ᩘ䜢㑅ู䛻౑䛳䛯䚹㻌 MET Significance 䛸䛿㻘㻌 ኻ䜟䜜䛯ᶓ᪉ྥ㐠ື䜶䝛䝹䜼䞊䜢஦㇟ᙜ䛯䜚䛾ᶓ᪉ྥ㐠ື䜶䝛䝹䜼䞊䛾࿴ᅗ 2㻌 ୧᪉䛾䝍䜴⢏Ꮚ䛾䜹䜲䝷䝸䝔䜱䛜ྑᕳ䛝䛷䛒䜚㻘㻌 ᘓタⓗᖸ΅䜢㉳䛣䛧䛶䛔䜛ሙྜ䛾୙ኚ㉁㔞䛾䝠䝇䝖䜾䝷䝮䚹㻌 Λࢫࢣ࣮ࣝࡣ㻌 20 TeV ࡟タᐃࡉࢀ࡚࠸ࡿࠋ

cos (� ∗ )䛭䛧䛶 � 䛾◊✲䛻䛴䛔䛶䛿୙ኚ㉁㔞䛾㑅ู䜢ඛ䛻䛾ᖹ᪉᰿䛷๭䛳䛯್䛷䛒䜛䚹㻌 䛣䜜䜢⏝䛔䛶䝙䝳䞊䝖䝸䝜䛻䜘䜚ኻ䜟䜜䛯ᶓ᪉ྥ㐠ື䜶䝛䝹䜼䞊䛜ከ䛔 W→τν ஦㇟䜢ῶᑡ䛥䛫䛯䚹䛧䛯ୖ䛷䝰䞁䝔䜹䝹䝻䝕䞊䝍䛾ゎᯒ䜢㐍䜑䛯䚹㻌 ᅗ 3, 4 䛷䛿㑅B-jet ᩘ䛾㑅ᢥ䛿㻘㻌 ᑡ䛺䛟䛸䜒 B-jet 䛜 2 䛴䛒䜛 tt 䝞䝑䜽䜾䝷䜴䞁ู䜢஧㔜䛻䛩䜛䛣䛸䛷㻘㻌 ᛶ⬟ᣦᩘ䜢ᨵၿ䛷䛝䜛䛣䛸䛜ุ᫂䛧㻘㻌 䜎䝗䜢ῶ䜙䛩䛣䛸䛜䛷䛝䜛䚹㻌 ಙྕ஦㇟䜢ῶ䜙䛥䛪䛻 Z→ττ ⫼ᬒ஦䛯 W → τν,㇟ 䜢 ῶ 䜙 䛩 䛻 䛿 㻘㻌 䜶 䝛 䝹 䜼 䞊 ್ 䛜 㧗 䛔 ᪉ 䛾 䝍 䜴 ⢏ Ꮚ 䛾䛺䛳䛯䚹㻌Transverse Momentum 䛜 40 GeV/c㻌 ௨ୖ䛷䛒䜛䛣䛸䜢せồ䛩䜛䛾䛜᭱㐺䛷䛒䜛䚹㻌Z → ττ 䛾⫼ᬒ஦㇟䛜୍␒ከ䛔䛣䛸䜒᫂䜙䛛䛻cos (� ∗ )䛿᪂䛯䛻ᑟධ䛧䛯ኚᩘ䛷䛒䛳䛯䛜㻘㻌 ศᕸ䛜୍␒≉ᚩⓗ䛷䛒䜛䛣䛸㻘㻌 䜎䛯ᛶ⬟ᣦᩘ䛜୍␒Ⰻ䛔䛣䛸䛛䜙 3 䛴䛾ኚᩘ䛾䛖䛱୍␒᭷ຠ䛷䛒䜛䛸⪃䛘䛯䚹㻌 䛥䜙䛻㻘㻌 ୙ኚ㉁㔞䛾䛧䛝䛔್

2.2.6 ⤖ᯝ䜢㧗䛟䛩䜜䜀䛩䜛䜋䛹㑅ู䛿䛿䛳䛝䜚䛸䛩䜛䛣䛸䜒䜟䛛䛳䛯䚹㻌ಙྕ஦㇟䛸⫼ᬒ஦㇟䜢ศ䛡䜛䛯䜑䛻౑⏝䛧䛯ኚᩘ䛾୰䛷㔜せ䛺ኚᩘ䛜 3 䛴䛒䛳䛯䚹 䛭䜜䛿㻘㻌 ୙ኚ㉁㔞㻘㻌 cos(�cos(� ∗ )ࡣ㻘㻌∗), � 䛷䛒䜛䚹ࢱ࢘⢏Ꮚࡀࢥࣜࣥࢬࢯ࣮ࣃ࣮ࣇ࣮࣒ࣞෆ࡟࠶ࡿ࡜ࡁࡢ㻘㻌 ධࡗ࡚ࡃࡿࢡ࢛࣮ࢡ࡟ᑐࡍࡿࢱ࢘⢏Ꮚࡢᨺฟゅ࡛࠶ࡾ㻘㻌 ࡇࡢኚᩘࡣಙྕ஦㇟ࢆぢᴟࡵࡿⅭ࡟㦫ࡃ࡯࡝Ⰻ࠸ຠᯝࢆ♧ࡋࡓࠋ� ࡣ௨ୗࡢᘧ࡟ἢࡗ࡚ࢱ࢘⢏Ꮚࡢ rapidity 䛾ᕪ㻌∗ゎᯒ䛜ึ䜑䛶䛷䛒䛳䛯䛜㻘㻌 ATLAS 䛻ឤᗘ䛜䛒䜛䛣䛸䛜䜟䛛䛳䛯䚹㻌
୙ኚ㉁㔞䛰䛡䜢ぢ䜛䛸㻘㻌 Λ䝇䜿䞊䝹䛿 10 TeV 䛟䜙䛔䜎䛷䛧䛛ぢ䜙䜜䛺䛔䛜㻘㻌 �, cos (� ∗ )䜢⤌䜏ྜ䜟䛫䜛䛣䛸䛻䜘䜚 㻟0 TeV䜎䛷䛾ឤᗘ䛜䛒䜛䛸⤖ㄽ䛧䛯䚹㻌 䛥䜙䛻㻘㻌 High Luminosity LHC 䛻䛚䛔䛶䜒ᮇᚅ䛜䛷䛝䛭䛖䛺◊✲ෆᐜ䛸䛺䛳䛯䚹㻌(� ) 䜢౑䛳䛶ィ⟬ࡉࢀࡓࠋ�䠙�㻌 ௒ᅇ䛾◊✲䛷䛿 ATLAS 䛷᥋ゐ┦஫స⏝䛻䜘䜛 di-tau ஦㇟䛾�|� ∗ |50387

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1.5TeV < InvM  2TeVATLAS

103 CERN ࡛ࡢ⏕άWork in Progresss = 13 TeV, 139 fb-1

㻌 㧗 ᰯ ⏕ 䛾 㡭 䛛 䜙 ៿ 䜜 䛶 䛔 䛯 CERN Summer Student Programme 䛻ཧຍ䛷䛝䛶ᮏᙜ䛻Ꮀ䛧䛟ᛮ䛔㻘㻌 ᭷ព⩏䛺ኟ䛜㐣䛤䛫1䛯䚹㻌 ≀⌮Ꮫ䛾ୡ⏺䛷ྠᚿ䛜ୡ⏺୰䛻䛷䛝䛯䛣䛸䛜䛣䜜䛛䜙䛾⮬ศ䛾ே⏕䛻䛚䛔䛶䛸䛶䜒㈗㔜䛻䛺䛳䛶䛔䛟䛰䜝䛖䛸ឤ䛨䛯䚹㻌ᖹ᪥䛿◊✲䛻໅䛧䜏㻘㻌 㐌ᮎ䛿ほග䜢䛧䛶ᴦ䛧䜐䛸䛔䛖䝞䝷䞁䝇10 1

CI Right-Left Const
BG ttbar
BG ZeeBG Ztautau
BG Wtaunu
Sig  = 20 TeV

2100246810䛾䛸䜜䛯⏕ά䛜䛷䛝䛶඘ᐇ䛧䛯ẖ᪥䛜㏦䜜䛯䚹㻌 ኱Ꮫ㝔䛷◊✲
䜢䛩䜛㌟䛸䛧䛶௒ᅇ䛾⤒㦂䛜Ⰻ䛔άຊ䛸䛺䛳䛯䚹㻌

1214161820
S/ BFigure of Merit108642Glob Sig = 20.10802468101214161820

ᅗ 3㻌 䝍䜴⢏Ꮚ䛾䜹䜲䝷䝸䝔䜱䛜ྑᕳ䛝䛸ᕥᕳ䛝䛷␗䛺䜚㻘㻌 ᘓタⓗᖸ΅䜢㉳䛣䛧䛶䛔䜛ሙྜ䛾 � ኚᩘ䛾䝠䝇䝖䜾䝷䝮䚹㻌 Λࢫࢣ࣮ࣝࡣ㻌 20 TeV ࡟タᐃࡉࢀ㻘㻌 ୙ኚ㉁㔞࡟1.5 TeV௨ୖ 2 TeV ௨ୗ䛾㑅ู䛜ຍ䛘䜙䜜䛯䚹
Entries / 0.2



3 TeV < InvM

ᅗ 5㻌 㻯㻹㻿 䛾䝒䜰䞊䛻⾜䛳䛯᫬䛾ᵝᏊ䚹㻌 ⴭ⪅䛿๓ิ䛾ྑ䛛䜙 3 ␒┠䛷䛒䜛䚹㻌1024 ௒ᚋࡢᢪ㈇㻌 ࣉࣟࢢ࣒ࣛ࡬ᮃࡴࡇ࡜10㻌 ௒ᅇ䛾◊✲䛷ᇵ䛳䛯ᢏ⾡䜢䛬䜂௒ᚋ䛾⮬ศ䛾◊✲䛻ά䛛䛧

1ATLAS䛶⾜䛝䛯䛔䛸ᛮ䛳䛯䚹㻌 ಶேⓗ䛻䛿䜎䛰䜎䛰⮬ศ䛾▱䜙䛺䛔◊Work in Progresss = 13 TeV, 139 fb-1✲ศ㔝䛜䛒䜚㻘㻌 Ⰽ䚻䛺ศ㔝䛻⯆࿡䜢ᣢ䛴䛣䛸䛜኱஦䛷䛒䜛䛣䛸

110CI Right-Left Const
BG ttbarBG Zee
BG Ztautau
BG Wtaunu
Sig  = 20 TeV

10 23101

0.8 0.6 0.4 0.2

00.2

0.4

0.6 0.8
1
CosThetaStar

S/ B

Figure of Merit
400
350
300
250
200
150
100
5001䛜䜟䛛䛳䛯䚹㻌㻌 ௒ᚋ䜒䛳䛸ཧຍ⪅䛜ቑ䛘䜛䛣䛸㻘㻌 䜎䛯ᵝ䚻䛺ศ㔝䛛䜙᪥ᮏே䛜㑅ฟ䛥䜜䜛䛣䛸䜢ᮃ䜐䚹㻌 ᾏእᅾఫ䛾᪥ᮏேྵ䜑㻘㻌 䛯䛟䛥䜣䛾Ꮫ⏕䛜Ⰽ䚻䛺኱Ꮫ䛛䜙䛣䛾䝥䝻䜾䝷䝮䛻㛵ᚰ䜢ᣢ䛳䛶䜒䜙䛘䜜䜀Ⰻ䛔䛸ᛮ䛖䚹㻌 㐣ཤ䛾ཧຍ⪅䛸䛧䛶⮬ศ䜒䛯䛟䛥䜣䛾ே䛻䛣䛾䝥䝻䜾䝷䝮䜢ᗈ䜑䛶䛔䛣䛖䛸ᛮ䛖䚹㻌Glob Sig = 501.491

0.8

0.6

0.4

0.2

00.2

0.4

0.6

0.8

1

CosThetaStarᅗ 4 䝍䜴⢏Ꮚ䛾䜹䜲䝷䝸䝔䜱䛜ྑᕳ䛝䛸ᕥᕳ䛝䛷␗䛺䜚 㻘㻌 ᘓタⓗᖸ΅䜢㉳䛣䛧䛶䛔䜛ሙྜ䛾cos(�∗ )䛾䝠䝇䝖䜾䝷䝮䚹㻌Λ䝇䜿䞊䝹䛿㻌 20 TeV 䛻タᐃ䛥䜜㻘㻌 ୙ኚ㉁㔞䛻㻌 3 TeV ௨ୖ䛾㑅ู䛜ຍ䛘䜙䜜䛯䚹㻌5 ㅰ㎡
㻌 CERN Summer Student Programme㻌 䛻ཧຍ䛩䜛䛻䛒䛯䜚㻘㻌 ከ䛟䛾᪉䛻䛚ୡヰ䛻䛺䜚䜎䛧䛯䚹㻌 ᛂເ䛩䜛䛻䛒䛯䜚᥎⸀≧䜢᭩䛔䛶䛟䛰䛥䛳䛯㤶ྲྀඛ⏕㻘㻌 ⰼᇉᩍᤵ䛻䛚♩䜢⏦䛧ୖ䛢䜎䛩䚹㻌 䜎䛯㻌

KEK 䛾ⓙ䛥䜎㻘㻌 ≉䛻㔝ᮧᵝ㻘㻌 ⏥ᮌᵝ㻘㻌 ኱ኚ䛚ୡヰ䛻䛺䜚䜎䛧䛯䚹

2.2.7 ࡇࢀ࠿ࡽᣦ ᑟ ᩍ ᐁ 䛸 䛧 䛶 ◊ ✲ 䜢 ぢ 䛶 䛟 䛰 䛥 䛳 䛯 Carl Gwilliam㻌 Ặ 䛸㻌 ௒ᅇ䛾ゎᯒ䛿䝅䝭䝳䝺䞊䝅䝵䞁䛾䝰䞁䝔䜹䝹䝻䝕䞊䝍䛰䛡䛷

Monica D’Onofrio Ặ䛿ᛁ䛧䛔୰䛔䛴䜒୎ᑀ䛻ᣦᑟ䜢䛧䛶䛟䛰䛥䛒䛳䛯䛜㻘㻌 䜒䛧䛣䜜䛛䜙䝕䞊䝍䜢ゎᯒ䛩䜛䛣䛸䛻䛺䜛䛸㻘㻌 䛹䛾䜘䛖䜚኱ኚឤㅰ䛧䛶䛔䜎䛩䚹㻌 ᭱ᚋ䛻㻘㻌 ᪥ᮏ䛛䜙䛾ཧຍ⪅䛷䛒䜛ⓙ䛥䛻㠀ඹ㬆䛾ศᕸ䜢䝕䞊䝍䛛䜙ㄞ䜏ྲྀ䜛䛾䛛㻘㻌 䛹䛾䜘䛖䛻䝠䝇䝖䜾䜣䛾䛚䛛䛢䛷䛔䛔ኟ䛜㐣䛤䛫䜎䛧䛯䚹㻌 䛣䛾ሙ䜢䛚೉䜚䛧䛶䛚♩䝷䝮䛺䛹䛻 fitting 䜢⾜䛖䛾䛛䛺䛹䛾⤫ィ䛻䛚䛡䜛ၥ㢟Ⅼ䛜⏕䛨䜢⏦䛧ୖ䛢䜎䛩䚹㻌 䛒䜚䛜䛸䛖䛤䛦䛔䜎䛧䛯䚹㻌䜛䚹㻌 䜎䛯 topology 䛾㐪䛖䝺䝥䝖䜽䜷䞊䜽䛺䛹䛾஦㇟䜒◊✲ᮦᩱ䛸ཧ⪃ᩥ⊩䛧䛶ṧ䛳䛶䛔䜛䚹㻌 䜒䛧䛛䛧䛯䜙䛣䜜䛜ㄡ䛛䛾༤ኈྕ䛾◊✲䛻䛺

[1] Suzanne Klaver. Lepton flavour universality in charged-current B decays.

䜛䛛䜒䛧䜜䛺䛔䛯䜑㻘㻌 ௒ᚋ䛹䛾䜘䛖䛻ゎᯒ䛜㐍䜐䛾䛛䜢ぢ䜛䛾In 17th Conference on Flavor Physics and CP Violation (FPCP 2019) Victoria,䛜ᴦ䛧䜏䛷䛒䜛䚹㻌BC, Canada, May 6-10, 2019, 2019.