501135‫ڦ‬ㄯヰᐊ

ILC ࡢ㏆ἣ
KEK ⣲⢏ᏊཎᏊ᰾◊✲ᡤ⸨㻌 ஭㻌 ᜨ㻌 ௓keisuke.fujii@kek.jp
2020 ᖺ 2 ᭶ 25 ᪥ࡇࡢグ஦࡛ࡣ㸪ILC ィ⏬ࡢᅜෆㄏ⮴࡟㛵ࡍࡿᨻᗓ࣭ᩥ㒊⛉Ꮫ┬࡛ࡢ᳨ウ㸪◊✲⪅ࡢྲྀࡾ⤌ࡳ㸪ᨻᗓ࡛ࣞ࣋ࣝࡢᅜ㝿ⓗ࡞ពぢ஺᥮㸪ᨻ἞㸪⏘ᴗ⏺㸪ೃ⿵ᆅᆅඖࡢᨭ᥼➼㸪ከ᪉㠃࡛ࡢ ILC ィ⏬ࡢ᭱㏆ࡢ㐍ᤖࢆᴫほࡍࡿࠋ1 ᨻᗓ࣭ᩥ㒊⛉Ꮫ┬㸪Ꮫ⾡఍㆟࡟ࡼࡿ᳨ウ䛒䜛 CERN 䛾 FCC-ee䠈୰ᅜ䛾 CEPC ➼䠅䜢ྵ䜐඲䛶䛾䝠䝑䜾䝇䝣䜯䜽䝖䝸䞊䛾㑅ᢥ⫥䛜㆟ㄽ䛾ᑐ㇟䛸䛺䜛䛸䛧䛯䚹 ILC ィ⏬䛾㏆ἣ䜢⤂௓䛩䜛䛻䛒䛯䛳䛶䠈᪥ᮏᨻᗓ䛻䜘䜛ṇᘧ᳨ウ䛜ጞ䜎䛳䛶௨᮶䛾ὶ䜜䜢⡆༢䛻᚟⩦䛧䛶䛚䛣䛖䚹ᩥ㒊⛉Ꮫ

3 Ḣᕞ⣲⢏Ꮚ≀⌮ᡓ␎ࡢ᭦᪂┬䛿䠈2014 ᖺ䛻䛂ᅜ㝿䝸䝙䜰䝁䝷䜲䝎䞊䠄ILC䠅䛻㛵䛩䜛᭷㆑⪅఍Ḣᕞ⣲⢏Ꮚ≀⌮ᡓ␎᭦᪂䛾㆟ㄽ䛿䠈䛭䛾䜘䛖䛺≧ἣ䛾୰䛷㆟䛃䜢タ⨨䛧䠈⣙ 4 ᖺ㛫䜢䛛䛡䠈ILC ᅜෆㄏ⮴䛻㛵䜟䜛ㅖㄢ㢟ጞ䜎䛳䛯䚹䝸䝙䜰䝁䝷䜲䝎䞊䞉䝁䝭䝳䝙䝔䜱䛿䠈2019 ᖺ 4 ᭶ 8-9 ᪥䛾᳨ウ䜢⾜䛔䠈2018 ᖺ 7 ᭶䛻䛭䛾᭱⤊ሗ࿌᭩䜢බ⾲䛧䛯[1]䚹䛻䝻䞊䝄䞁䝚䛷఍ྜ䜢ᣢ䛱䠈2019 ᖺ 5 ᭶䛻㛤ദ䛥䜜䛯䜾䝷䝘䝎ᩥ㒊⛉Ꮫ┬䛿䛣䛾᭷㆑⪅఍㆟䛾᭱⤊ሗ࿌᭩䛸䛸䜒䛻䠈᪥ᮏᏛ䛷䛾Ḣᕞ⣲⢏Ꮚ≀⌮ᡓ␎᭦᪂䛾䛯䜑䛾䝁䝭䝳䝙䝔䜱఍㆟䛻ྥ䛡䠈⾡఍㆟䛻䠈250 GeV ILC ィ⏬䛾Ꮫ⾡ⓗព⩏䜔Ꮫ⾡◊✲඲య䛻䝸䝙䜰䝁䝷䜲䝎䞊䛻䜘䜛䝠䝑䜾䝇䝣䜯䜽䝖䝸䞊䜢䠄ILC,CLIC ేグ䛷䠅䛚䛡䜛఩⨨䛵䛡䠈ᅜẸཬ䜃♫఍䛻ᑐ䛩䜛ព⩏䠈᪋タ䛾ᘓタཬᥦ᱌䛩䜛䛣䛸䛻Ỵ䜑䛯䚹䜾䝷䝘䝎఍㆟䛻ྥ䛡䠈䝸䝙䜰䝁䝷䜲䝎䞊䞉䜃㐠Ⴀ䛻㛵䛩䜛ㅖ᮲௳䛺䛹䛻䛴䛔䛶ㄪᰝᑂ㆟䜢౫㢗䛧䛯䚹᪥䝁䝷䝪䝺䞊䝅䝵䞁䠄LCC䠅䛿䠈100 䝨䞊䝆㉸䛾ሗ࿌᭩[3]䜢ฟ∧䛩ᮏᏛ⾡఍㆟䛿䠈䛂ᅜ㝿䝸䝙䜰䝁䝷䜲䝎䞊䛾ぢ┤䛧᱌䛻㛵䛩䜛᳨䜛䛸ඹ䛻䠈Giga-Z 䜸䝥䝅䝵䞁䜢ྵ䜐㟁ᙅ⢭ᐦ ᐃ䠈1 TeV 䛷䛾ウጤဨ఍ཬ䜃ศ⛉఍䛃䜢タ⨨䛧䠈4 䞄᭶䛒䜎䜚䛾㞟୰ⓗ䛺ᑂ㆟≀⌮䠈Z’➼䛾 s-䝏䝱䞁䝛䝹ඹ㬆≧ែ᥈⣴➼䛻㛵䛧䛶䜒䠈Ḣᕞᡓ䜢⤒䛶 2018 ᖺ 12 ᭶䠈䛂ᅜ㝿䝸䝙䜰䝁䝷䜲䝎䞊ィ⏬䛾ぢ┤䛧᱌䛻␎᭦᪂䝥䝻䝉䝇䛾≀⌮‽ഛ䜾䝹䞊䝥䛻᪂䛯䛺ධຊ䜢⥆䛡䛯䠄䜾㛵䛩䜛ᡤぢ䛃䜢බ⾲䠈ᩥ㒊⛉Ꮫ┬䛻ᡭ஺䛧䛯[2]䚹㻌

䝷䝘䝎఍㆟ᚋ䛻ሗ࿌᭩䛸䛧䛶ฟ∧[4]䠅䚹䛣䜜䜙䛾ሗ࿌᭩సᡂ䛻䛿᪥ᮏ䛾 ILC䜾䝹䞊䝥䜒῝䛟㛵୚䛧䛶䛔䜛䚹䜾䝷䝘䝎఍㆟䛷䛿䠈2 ᖹᡂ 31 ᖺ 3 ᭶ࡢᩥ㒊⛉Ꮫ┬࡟ࡼࡿぢゎ⾲᫂㟁Ꮚ㝧㟁Ꮚ䝁䝷䜲䝎䞊䛻䜘䜛䝠䝑䜾䝇䝣䜯䜽䝖䝸䞊䛜᭱ඃඛ䛸䛾ㄆᩥ㒊⛉Ꮫ┬䛿䠈䛣䛾Ꮫ⾡఍㆟䛾ᡤぢ䜢ཷ䛡䠈2019 ᖺ 3 ᭶ึ䝣䜯䜽䝖䝸䞊ィ⏬䛿䠈෇ᙧ⥺ᙧ䜢ၥ䜟䛪䠈䛭䛾ᛶ⬟䛻᭷ព䛺ᕪ䜑䛾 ICFA/LCB 䛾ጤဨ఍䛻䛚䛔䛶䠈 ึ䜑䛶 ILC 䛻㛵䛩䜛᪥ᮏ䛜䛺䛔䛸䛾⤖ㄽ䛻⮳䛳䛯䚹䛣䜜䜙䛾⤖ㄽ䜢ྵ䜐Ḣᕞ⣲⢏Ꮚ≀⌮ᨻᗓ䛸䛧䛶䛾බᘧぢゎ䜢⾲᫂䛧䛯䚹䛭䛾୰䛷䠈䛂᪥ᮏᏛ⾡఍㆟ᡓ␎᭦᪂䝥䝻䝉䝇䜈䛾ධຊᩥ᭩䠈䜾䝷䝘䝎఍㆟䛷䛾㆟ㄽ䛿≀䛾ᡤぢ䜢㋃䜎䛘䠈⌧᫬Ⅼ䛷᪥ᮏㄏ⮴䛾⾲᫂䛻䛿⮳䜙䛺䛔䛃䛸䛧⌮‽ഛ䜾䝹䞊䝥䛻䜘䜚≀⌮䝤䝸䞊䝣䜱䞁䜾䞉䝤䝑䜽䛻䜎䛸䜑䜙䜜䛶

䛴䛴䛂ILC ィ⏬䛻㛵ᚰ䜢ᣢ䛳䛶ᅜ㝿ⓗ䛺ពぢ஺᥮䜢⥅⥆䛩䜛䛃䛔䜛[5]䚹Ḣᕞᡓ␎䛿䠈2020 ᖺ 2 ᭶⌧ᅾ䠈䛣䛾䝤䝸䞊䝣䜱䞁䜾䞉䛸㏙䜉䛯䚹᪥ᮏᨻᗓ䛜 ILC ィ⏬䜈䛾㛵ᚰ䜢බᘧ䛻⾲᫂䛧䛯䛾䝤䝑䜽䛾ෆᐜ䛻≀⌮௨እ䛾ㅖ᮲௳䜢ຍ࿡䛧䛶䠈Ḣᕞᡓ␎䜾䛿䛣䜜䛜ึ䜑䛶䛷䛒䜛䚹୍᪉䠈䛂ṇᘧ䛺Ꮫ⾡䝥䝻䝉䝇䠄᪥ᮏᏛ⾡䝹䞊䝥䛻䜘䜚ⲡ᱌䛜䛷䛝䛯ẁ㝵䛻䛒䜛䚹Ḣᕞᡓ␎䜾䝹䞊䝥䛻䛿䠈఍㆟䛜⟇ᐃ䛩䜛䝬䝇䝍䞊䝥䝷䞁➼䠅䛷㆟ㄽ䛩䜛䛣䛸䛜ᚲせ䛃䛸䛾᪥ᮏ䛛䜙䜒䠈㧗䜶䝛䝹䜼䞊≀⌮Ꮫ⪅఍㆟䛛䜙䛾බ㛤᭩⡆[6]䜢

ᣦ᦬䛸䛸䜒䛻䠈䛂Ḣᕞ⣲⢏Ꮚ≀⌮ᡓ␎➼䛻䛚䛡䜛㆟ㄽ䛾㐍ᤖ䛻ጞ䜑䠈䜘䜚᭱㏆䛷䛿ሗ࿌᭩[7]➼䠈ILC ィ⏬ᐇ⌧䛻ྥ䛡䛯᪥ᮏὀど䛩䜛䛃䛸䛾ពྥ䜒♧䛧䛯䚹䛣䜜䛻ᑐ䛧 ICFA 䛿䠈䝠䝑䜾䝇䝣䜯䜽䛷䛾ᵝ䚻䛺ྲྀ䜚⤌䜏䛻䛴䛔䛶䠈ධຊ䜢⾜䛺䛳䛶䛔䜛䚹㆑䛜ཧຍ⪅䜋䜌඲ဨ䛻ඹ᭷䛥䜜䜛䛸䛸䜒䛻䠈ᥦ᱌䛥䜜䛯䝠䝑䜾䝇䝖䝸䞊䛜ᅜ㝿༠ຊ䛷㐍䜑䜛ᑗ᮶ຍ㏿ჾィ⏬䛾᭱ඃඛ஦㡯䛷䛒䜛䛸䛾ᅜ㝿ྜព䜢☜ㄆ䛧䛯ୖ䛷䠈ᩥ㒊⛉Ꮫ┬䛚䜘䜃㛵ಀ┬ᗇ

4 KEK ࡢྲྀࡾ⤌ࡳ䛻䛚䛡䜛 ILC ィ⏬䜈䛾㛵ᚰ䛾බᘧ⾲᫂䜢㔜せ䛺䝬䜲䝹䝇䝖䞊䞁 ୍᪉㸪KEK ࡣ㸪᪥ᮏᨻᗓ࡟ࡼࡿබᘧぢゎ⾲᫂ࢆཷࡅ㸪᪥䛸ཷ䛡ྲྀ䜚䛴䛴䜒䠈᪥ᮏᨻᗓ䛻䜘䜛᪥ᮏㄏ⮴䛾᫂☜䛺ពᛮ⾲♧ᮏᏛ⾡఍㆟ࡀ⟇ᐃࡍࡿ࣐ࢫࢱ࣮ࣉࣛࣥࡢ኱ᆺ◊✲ィ⏬ࡢເ䛜䛺䛛䛳䛯䛣䛸䛛䜙䠈௒ᚋ䛿 ILC ௨እ䛾ィ⏬䠄ᖖఏᑟຍ㏿✵Ὕ㞟࡟ᛂࡌ㸪ILC ィ⏬ࢆᥦ᱌ࡋࡓࠋࡲࡓ㸪ILC ࡀḢᕞ⣲⢏Ꮚ䛻䜘䜛䝸䝙䜰䝁䝷䜲䝎䞊䛷䛒䜛 CERN 䛾 CLIC䠈෇ᙧ䝁䝷䜲䝎䞊䛷≀⌮ᡓ␎᭦᪂࡟࠾࠸࡚↛ࡿ࡭ࡃ఩⨨௜ࡅࡽࢀࡿ࡟ࡣ㸪ᅜ㝿⤒㈝ศᢸࡢぢ㏻ࡋ➼࡟ࡘ࠸࡚ࡢ㐍ᒎࢆ♧ࡍࡇ࡜ࡀ㔜せ࡛࠶502136

ࡿࠋKEK ࡣ㸪ࡇࢀ࡟㛵ࡋ 2019 ᖺ 5 ᭶࡟ ILC ᅜ㝿࣮࣡࢟ࣥᩥ㒊⛉Ꮫ┬࠿ࡽࡢ 2 ྡ㸪ILC ᥎㐍㆟㐃࠿ࡽࡢ 3 ྡ㸪◊✲⪅ࢢࢢ࣮ࣝࣉࢆタ⨨ࡋ㸪ᘓタ⤒㈝㸪㐠㌿⤒㈝ࡢᅜ㝿ศᢸ࡟ࡘ࠸

࠾ࡼࡧೃ⿵ᆅᆅඖ࠿ࡽࡢ 7 ྡࢆྵࡴゼၥᅋࡀ࣋ࣝࣜࣥ࠾ࡼ

࡚ࡢ⪃࠼᪉㸪ILC ࢆᐇ⌧ࡍࡿࡓࡵࡢ⤌⧊ࡢᅾࡾ᪉㸪ᢏ⾡ⓗࡧࣃࣜࢆゼࢀ㸪ᩥ㒊⛉Ꮫ┬ࡢ࢝࢘ࣥࢱ࣮ࣃ࣮ࢺ࡜࡞ࡿࢻ࢖ࢶ‽ഛ࡟ྲྀࡾ⤌ࡴࡓࡵࡢᅜ㝿༠ຊ࡟ࡘ࠸᳨࡚ウࢆ㐍ࡵ㸪2019

ࡢ BMBF ࠾ࡼࡧࣇࣛࣥࢫࡢ MESRI ࡜఍ྜࢆᣢࡕ㸪᪥⡿㛫ᖺ 10 ᭶㸪ࠕILC ࣉࣟࢪ࢙ࢡࢺᐇ᪋࡟㛵ࡍࡿᥦゝࠖࢆබ⾲ࡋ

࡜ྠᵝ࡞ᨻᗓ࡛ࣞ࣋ࣝࡢࢹ࢕ࢫ࢝ࢵࢩࣙࣥࢢ࣮ࣝࣉࢆ᪥⊂㸪

ࡓ[8]ࠋ᪥௖ࡢ㛫࡛ࡶタ⨨ࡍࡿࡇ࡜࡟ྜពࡋࡓࠋࡇࡢᥦゝ࡛ࡣ㸪ᅜ㝿⤒㈝ศᢸ࡟㛵ࡋ࡚ࡣ㸪ᅵᮌᘓ⠏ࡣ࣍ࢫ㻌 䛣䛖䛧䛯㐍ᒎ䛾୰䛷䠈10 ᭶ 26 ᪥䛛䜙 11 ᭶ 1 ᪥䛻䛛䛡䛶௝ྎࢺᅜ㸪ຍ㏿ჾᮏయࡣ࣓ࣥࣂ࣮ᅜ࡛ศᢸ㸪࢖ࣥࣇࣛ᪋タ࣭タഛ䛷 Linear Collider Workshop 2019 (LCW2019)䛜㛤ദ䛥䜜䛯䚹࡟ࡘ࠸࡚ࡣ࣍ࢫࢺᅜ㈉⊩ࡀ኱ࡁ࡞㒊ศࢆ༨ࡵࡿࡇ࡜ࡀᮇᚅᅜෆእ䛾◊✲⪅䠈ILC 䛻㛵ᚰ䜢ᣢ䛴௻ᴗ䛛䜙 400 ྡ௨ୖ䛜ཧࡉࢀࡿ࡜ࡋ㸪ᘓタ࡟࠶ࡓࡾ㐠㌿⤒㈝ศᢸ࡟ࡘ࠸࡚ྜពࡍࡿࡇ

ຍ䛩䜛 LCWS 䝅䝸䞊䝈䛸䛧䛶䛿䛣䜜䜎䛷䛷᭱኱䛾఍㆟䛸䛺䛳䛯࡜࡜ࡋ࡚࠸ࡿࠋࡲࡓ⤌⧊࡟ࡘ࠸࡚ࡣ㸪ᮏ‽ഛᮇ㛫࡟㸪ྛᅜᨻ䠄ᅗ 1䠅䚹䛣䛾఍㆟䛷䛿䠈ILC ィ⏬䛾㔜せᛶ䛸ᅜ㝿䝁䝭䝳䝙䝔䜱䛾ᗓࡢ஢ゎࡢࡶ࡜㸪ぬ࠼᭩ࡁ࡟ᇶ࡙ࡁୡ⏺ࡢ◊✲ᶵ㛵࡟ࡼࡾ

ILC ᐇ⌧䛻ྥ䛡䛯Ỵព䜢♧䛩䛂௝ྎᐉゝ䛃䛜᥇ᢥ䛥䜜䠈බ⾲䛥

ILC ‽ഛ◊✲ᡤࢆタ⨨ࡋ㸪ILC ᘓタ࡟ྥࡅࡓᢏ⾡ⓗ‽ഛస䜜䛯[9]䚹᭱⤊᪥䛻䛿䠈䜰䝯䝸䜹኱౑㤋䜢௦⾲䛧䝯䝸䞁䝎䞉䝟䞊ᴗ࡜㸪୪⾜ࡋ࡚⾜ࢃࢀࡿ ILC ᘓタྜពࡢࡓࡵࡢᨻᗓ㛫஺΅䝧䝑䜽Ặ䛜⡿ᅜ䛾 ILC 䛻ᑐ䛩䜛ຊᙉ䛔䝃䝫䞊䝖䛾ពᛮ䜢♧䛧䛯ࡢ⿵బࢆࡍࡿࡇ࡜㸪ࡑࡇ࡛ࡣ KEK ࡣ࣍ࢫࢺ◊✲ᡤ࡜ࡋ࡚୰

[10]䚹䜎䛯䠈ILC ᘓタ᥎㐍㆟ဨ㐃┕䠈ILC ㄏ⮴ᐇ⌧㐃⤡༠㆟఍᰾ⓗ࡞ᙺ๭ࢆᯝࡓࡍࡇ࡜ࡀᥦゝࡉࢀ࡚࠸ࡿࠋILC ‽ഛ◊✲䜢௦⾲䛧䠈⾗㆟㝔䛾ሷ㇂❧㆟ဨ䛛䜙䛾ຊᙉ䛔ᛂ᥼䝯䝑䝉䞊䝆䜒ᡤࡣ㸪ᘓタ࡟㛵ࡍࡿᨻᗓ㛫ྜពࡀᡂ❧ࡋࡓ᫬Ⅼ࡛ ILC ◊✲ᒆ䛡䜙䜜䛯[11]䚹

ᡤ࡟⛣⾜ࡋ㸪ILC ຍ㏿ჾᘓタ࡜ࡑࡢ㐠㌿࡟㛗ᮇⓗ࡞㈐௵ࢆᣢࡘࡇ࡜࡟࡞ࡿࠋᢏ⾡‽ഛ࡟㛵ࡋ࡚ࡣ㸪ୖグᩥ㒊⛉Ꮫ┬᭷㆑

6 ᨻ἞㸪⏘ᴗ⏺㸪ᆅඖࡢࢧ࣏࣮ࢺ⪅఍㆟ࡢሗ࿌ࡸ᪥ᮏᏛ⾡఍㆟᳨ウጤဨ఍ࡢᡤぢ࡛ᣦ᦬ࡉࢀ

ሷ㇂㆟ဨ䛾ᛂ᥼䝯䝑䝉䞊䝆䛷ゐ䜜䜙䜜䛶䛔䜛䜘䛖䛻䠈ILC ᐇࡓᢏ⾡ㄢ㢟ࢆ୰ᚰ࡟㸪ᅜ㝿༠ຊ࡛㐍ࡵࡿ࡭ࡁㄢ㢟࡜༠ຊඛ⌧䛻ྥ䛡䛯ᨻ἞䝺䝧䝹䛷䛾ᵝ䚻䛺άື䛜⥆䛔䛶䛚䜚䠈䛣䜜䛿䠈ೃ⿵ࢆྵࡵ࡚‽ഛィ⏬ࡀࡲ࡜ࡵࡽࢀ࡚࠸ࡿࠋࡇࢀࡽࡢᥦゝ᪤䛻㏙䜉䛯ᨻᗓ䝺䝧䝹䛷䛾ᅜ㝿ពぢ஺᥮䛾㐍ᒎ䛾ཎືຊ䛻䜒ࡣ㸪ᩥ㒊⛉Ꮫ┬ࡢぢゎ⾲᫂࡟࠶ࡗࡓᨻᗓ࡛ࣞ࣋ࣝࡢពぢ஺䛺䛳䛶䛔䜛䚹䜎䛯䠈ୖグᩥ⊩[7]䛻ヲ䛧䛟㏙䜉䜙䜜䛶䛔䜛㏻䜚䠈⤒᥮➼࡟ά⏝ࡉࢀࡿࡇ࡜ࡀᮇᚅࡉࢀࡿࠋ῭䠏ᅋయ䠄⤒ᅋ㐃䠈ྠ཭఍䠈ၟᕤ఍㆟ᡤ䠅䛛䜙 ILC ィ⏬䜈䛾ᮇᚅ䛸䝃䝫䞊䝖䛜⾲᫂䛥䜜䛶䛚䜚䠈䜎䛯䠈100 ♫䜢㉸䛘䜛௻ᴗ䛜ཧ

5 ᨻᗓ࡛ࣞ࣋ࣝࡢពぢ஺᥮ຍ䛩䜛ඛ➃ຍ㏿ჾ༠㆟఍䠄AAA䠅䜢௓䛧䛯⏘Ꮫ㐃ᦠ䛾 ILC ィ ᨻᗓ࡛ࣞ࣋ࣝࡢពぢ஺᥮࡟㛵ࡋ࡚ࡣ㸪2019 ᖺ㸵᭶ึ㢌㸪⏬᥎㐍άື䛜άⓎ䛻⥆䛡䜙䜜䛶䛔䜛䚹䜎䛯䠈ILC ᘓタೃ⿵ᆅ䛷ᅗ 1㻌 ௝ྎ䛷㛤ദ䛥䜜䛯䝸䝙䜰䝁䝷䜲䝎䞊䝽䞊䜽䝅䝵䝑䝥䛾ཧຍ⪅㞟ྜ෗┿䚹䛒䜛໭ୖᒣᆅ䛾ᆅඖ⮬἞య䛛䜙䜒ᙉ䛔䝃䝫䞊䝖䛜䛒䜚䠈≉䛻䠈ᒾᡭ┴䛷䛿䠈ILC ᥎㐍ᒁ䜢タ⨨䛧䛶ᩘ༑ேయไ䛷 ILC ィ⏬ㄏ⮴䛻ྥ䛡ᆅ㉁ㄪᰝ䜢ጞ䜑䛸䛩䜛ᵝ䚻䛺‽ഛάື䛜⾜䜟䜜䛶䛔䜛䚹䛣䜜䜙䛾‽ഛάື䛻䛿䠈ೃ⿵ᆅᆅඖ䛷䛾 KEK 䛾◊✲⪅䛻䜘䜛ᨺᑕ⥺Ᏻ඲➼䛻㛵䛩䜛ㄝ᫂఍䜒ྵ䜎䜜䛶䛔䜛䚹503
137[5] “Physics Briefing Book: Input for the European Strategy forParticle Physics Update 2020”, European Strategy for Particle

Physics

Preparatory

Group,

Oct.

2019,

https://arxiv.org/abs/1910.11775[6] “To European Strategy Group”, 㧗 䜶 䝛 䝹 䜼 䞊 ጤ ဨ 㛗 , ௧࿴ 2 ᖺ 1 ᭶ 30 ᪥ࠊ᪥ᮏᏛ⾡఍㆟࡟ࡼࡾ࣐ࢫࢱ࣮ࣉࣛࣥ

http://www.jahep.org/files/ESG_Japan_Nov06_signed.pdf

ࡀබ⾲ࡉࢀࡓ[12]ࠋILC ィ⏬ࡣ㸪㔜Ⅼィ⏬࡟ࡣ㑅ࡤࢀ࡞࠿ࡗ

[7] “Recent Progress Towards the Realization of the ILC in Ja-ࡓࡀ㸪ࣄ࢔ࣜࣥࢢ࡟㐍ࢇࡔィ⏬ࡢࣜࢫࢺ࡟ࡣධࡗ࡚࠾ࡾ㸪⩣

pan: Cooperative Efforts by Academina, Industry, and Local

᪥ 1 ᭶ 31 ᪥࡟ࡣ㸪ᩥ㒊⛉Ꮫ኱⮧[13]ࡸෆ㛶ᗓࡢ⛉Ꮫᢏ⾡ᢸRegion”, 㧗䜶䝛䝹䜼䞊ጤဨ㛗,ᙜ኱⮧[14]࠿ࡽィ⏬᥎㐍࡟๓ྥࡁ࡞Ⓨゝࡀ࠶ࡗࡓࡇ࡜࠿ࡽ㸪

http://jahep.org/files/input_JapanHEPC_20191213.pdf

௒ᚋ㸪ᨻ⟇ⓗ࡞㆟ㄽࡀ㐍ࡴࡇ࡜ࡀᮇᚅࡉࢀࡿࠋḢᕞ⣲⢏Ꮚ≀[8] “Recommendation on ILC Project Implementation”, High⌮ᡓ␎࡟ࡘ࠸࡚ࡣ㸪1 ᭶ 21 ᪥࠿ࡽ 25 ᪥ࡢࢻࣛࣇࢸ࢕ࣥࢢ࣭

Energy Accelerator Research Organization (KEK), Oct.1,

ࢭࢵࢩࣙࣥࡀ⤊ࢃࡾ㸪3 ᭶ࡢ CERN ࢝࢘ࣥࢩࣝ఍ྜ࡛㆟ㄽ2019,ࡉࢀ㸪᭱⤊ⓗ࡟ 5 ᭶ࡢ CERN ࢝࢘ࣥࢩࣝࡢ≉ู఍ྜ࡛ࡢᢎ

tic/20191001_%20ILC%20Project.pdf

ㄆࢆ⤒࡚ṇᘧබ⾲ࡉࢀࡿணᐃ࡛࠶ࡿࠋࡇ࠺ࡋࡓືࡁࡢ୰㸪2᭶ 20 ᪥࡟⡿ᅜ SLAC ࡛㛤࠿ࢀࡓ LCB ࡢ఍ྜ࡟ࡣ㸪ᩥ㒊⛉Ꮫ┬◊✲᣺⯆ᒁࡢቑᏊᏹᑂ㆟ᐁ㸪ILC ᘓタ᥎㐍㆟ဨ㐃┕䛾⾗㆟㝔䛾Ἑᮧᘓኵ㆟ဨࡀฟᖍࡋ≧ἣࢆㄝ᫂ࡋࡓࠋICFA ࡣ㸪ࡇࢀࢆཷࡅ㸪2 ᭶ 25 ᪥㸪ኌ᫂ࢆබ⾲ࡋ[15]㸪ࡑࡢ୰࡛㸪᪥ᮏ㸪⡿ᅜ㸪Ḣᕞㅖᅜ㛫ࡢᨻᗓ㛫㆟ㄽࡢ㐍ᒎࢆホ౯࣭Ḽ㏄ࡋ㸪
KEK ࡀᘓタ࡟ྥࡅࡓᮏ᱁ⓗ‽ഛẁ㝵࡬ࡢ⛣⾜ࢆ᥎㐍ࡍࡿࡓࡵࡢᅜ㝿᥎㐍ࢳ࣮࣒ࢆ࣍ࢫࢺࡍࡿࡇ࡜ࢆ᥎ዡࡍࡿ࡜࡜ࡶ࡟㸪[9] 䛂௝

https://www.kek.jp/ja/newsroom/at-ྎᐉゝ䛃,

https://www.kek.jp/ja/news-room/2019/11/01/1330/[10] “US-Japan Cooperation in Science and Technology”,
MelindaPavek,

https://agenda.linearcol-lider.org/event/8217/contributions/44502/attachments/35114/54363/Sendai_ILC_draft_remarks-_final_for_Jim.pdf

ILC ࡟㛵ᚰࢆᣢࡘ◊✲⪅㸪◊✲ᡤ㸪࠾ࡼࡧᅜᐙ࡟ᑐࡋ㸪ILC[11] “Message to Researchers Worldwide”, Hon. Ryu Shionoya,タ❧࡟ྥࡅࡓࡇࢀࡽࡢ‽ഛάືࢆᨭ᥼ࡋ㸪ࡑࢀ࡟ཧຍࡍࡿࡇ

https://agenda.linearcollider.org/event/8217/contribu-࡜ࢆዡບࡋࡓࠋILC ィ⏬ࡣ㸪ᐇ⌧࡟ྥࡅ᪂ࡋ࠸ẁ㝵࡟ධࢁ

tions/44436/attach-࠺࡜ࡋ࡚࠸ࡿࠋ

ments/35112/54361/LCWS2019_Hon.Shionoya_Ryu_JP.pdf[12] “➨ 24 ᮇᏛ⾡䛾኱ᆺ◊✲ィ⏬䛻㛵䛩䜛䝬䝇䝍䞊䝥䝷䞁”,᪥ᮏ Ꮫ⾡఍㆟ , http://www.scj.go.jp/ja/info/kohyo/kohyo-ཧ⪃ᩥ⊩[1] “ᅜ㝿䝸䝙䜰䝁䝷䜲䝎䞊䠄ILC䠅䛻㛵䛩䜛᭷㆑⪅఍㆟䠖ILC ィ⏬䛾ぢ┤䛧䜢ཷ䛡䛯䛣䜜䜎䛷䛾㆟ㄽ䛾䜎䛸䜑”䠈ᩥ㒊⛉Ꮫ┬ ᅜ㝿䝸䝙䜰䝁䝷䜲䝎䞊䠄ILC䠅䛻㛵䛩䜛᭷㆑⪅఍㆟䠈
http://www.mext.go.jp/compo-[2] “ᅇ⟅䛂ᅜ㝿䝸䝙䜰䝁䝷䜲䝎䞊ィ⏬䛾ぢ┤䛧᱌䛻㛵䛩䜛ᡤぢ䛃”䠈᪥ᮏᏛ⾡఍㆟䠈
http://www.scj.go.jp/ja/info/kohyo/pdf/kohyo-24-k273.pdf[3] “The International Linear Collider, A Global Project”, PhilipBambade, et al. representing the Linear Collider Collaboration and the global ILC community, March 2019,https://arxiv.org/abs/1903.01629[4] “Tests of the Standard Model at the International Linear ColPhysics

https://arxiv.org/abs/1908.11299

WG,

Aug.,

tail/mext_00029.html
https://nettv.gov-

file/2018/09/20/1409220_1_1.pdf

LCC

https://www.mext.go.jp/b_menu/daijin/de[14] “➉ᮏ኱⮧㛶㆟ᚋグ⪅఍ぢ䠄௧࿴ 2 ᖺ 1 ᭶ 31 ᪥䠅”,

nent/b_menu/shingi/toushin/__icsFiles/afield-lider”,

24-t286-1.html[13] “ⴗ⏕⏣ᩥ㒊⛉Ꮫ኱⮧グ⪅఍ぢ䠄௧࿴ 2 ᖺ 1 ᭶ 31 ᪥䠅䇿,

2019,

online.go.jp/prg/prg20203.html?t=176&a=1[15] “ICFA Statement on the ILC Project䇿䠄௧࿴ 2 ᖺ 2 ᭶ 25 ᪥䠅,
http://wwwcms1.kek.jp/ja/newsroom/2020/02/25/1400/index.html