6
1 ˙ ஊ จ৽Ͱ? — LHC 750 GeV ΞϊϚϦʔహ هKIAS (ߴࠃՊӃ) [email protected] 2016 (28 ) 11 7 1 ॳΊʹ ٴݧͼݱͷʹڀݚɼॏཁͳ ͱͷҰɼʹطΕཧͰઆͰͳݱ ݟΕʹࡍͲΔͰΔɻಛʹݱΛ ڀݚΔਓʹͱɼ؍ଌΕਅʹ৽ ཧͷଘΛΔͳΒɼͷΛઆΔͱ ͷඪ४ܕΛཧΛߏஙΔͷݪͱͳΔͷͰɼඇৗʹେͳҙຯΛɻΖΜɼݟ ΕݱͷಛʹΑΓɼͲͷΑͳ৽ཧ· େҟͳΔɼ2015 12 ʹ ATLASɼ CMS ݧάϧʔϓʹΑΓදΕɼʮ750 GeV ݱʹΕೋͷΒߏΕΔෆมͷϐʔΫͷ ʯ [1, 2, 3] ɼҎԼͷೋͷཧ༝Ͱଟͷݱ ڀݚͷ৺ΛݺΜɻҰɼಛఆͷΛ৽ ΛಋೖΕɼൺత༰қʹແໃ६ͳઆՄͳ ͱɼҰɼ·ࠓͰڀݚΕଟͷݱ ܕͷηοτΞοϓʹ (ඞཁͳΒܕΛு) ຒΊΊΔͱͰΔɻ ߘͰɼ2015 12 த०Β 2016 8 ॳ०ʹ ɼݧάϧʔϓΒʹ൱ఆతݟղΛग़Ε Δ·Ͱଓɼऴతʹ 400 ຊҎͷจදΕΔ ՌͱͳɼૉݱࢠʹΔ Γݱʹ ৼΓฦΈ 1 ɻ ߘͷߏҎԼͷʹͳΔɻ· 2 ষͰ 750 GeV ͷϐʔΫʹ·ΘΔཧͷجຊతΛɼଓ 3 ষͰ୯७ແໃ६ͳઆͷ๏ΛղઆΔɻ ͷʹޙɼ4 ষͰݱڀݚʹ ΑΓΛͷΛ۩ମΛத৺ʹղઆʹޙɼ 5 ষͰͷঢ়گΛɼߟΛͳΒৼΓฦΔɻ ޙ࠷ʹ 6 ষͰɼͷҰ࿈ͷహΒɼզʑԿΛͿͱ ͰΔʹ؆୯ʹίϝϯτɻ 1 ࿈จͷ΄΅શͳϦετɼҎԼͷϦϯΫΒೖखՄ [4]ɻ 2 ͱͷղऍ 2.1 ͷج750 GeV ลʹग़ݱೋͷΒߏΕΔ ෆมͷϐʔΫͷղऍͱૉવͳͷ ɼʮ 750 GeV ఔͷɼΕʹյʯͱߟΔͱͰΔɻ2012 7 4 ʹ (Α)125 GeV ͷώοάεͷଘ ATLAS ٴͼ CMS ʹݧΑΓͱʹΑΓɼඪ४ ʹܕݟͷ·ΕͳͳͷͰɼͷΑͳ ͷग़ݱɼ΄΅ඞવతʹඪ४ܕΛཧͷଘΛΔͱʹͳΔɻ Ͱɼͷͷεϐϯͷʹߟ ΈΑɻεϐϯ 1/2 ͷϑΣϧϛΦϯϑΣϧϛ౷ܭ ΒΒʹໃ६ɼεϐϯ 1 ͷରʹյͰ ͳͱ Landau-Yang ͷఆཧͷଘΛ೦಄ʹஔͱ ൱ఆΕΔɻͰɼΔεϐϯ 0(εΧϥʔɼώο άεҰ) εϐϯ 2(ςϯιϧɼॏ[ݟ] Ұ) ͳͲͷϘιϯʹͳΔɼҎԼͰಋ ؆୯ͳɼεΧϥʔΛʹߟΔͱʹΔɻ ՙΛͱ߹ͰΔɼ ՙΛͳɻҰͰɼՙͷอଘଇʹΑΓɼ ݩͷ 750 GeV ͷՙతʹதͰͳΕͳΒͳ ΔɻΑɼ750 GeV ͷ৽ͱ ߹ΔͱͰͳɻɼͷͱɼͷε Χϥʔରͱ߹ͰͳͱΛҙຯΔΘ ͰͳɻԾʹͷɼԿՙΛͱ ߹ΔͳΒɼਤ 1 ͷΑʹ 1 ϧʔϓͷաఔΛ௨ յՄɻյલͷੜաఔʹಉʹɼεΧ ϥʔΫΥʔΫͷʹΧϥʔՙΛͱ߹ ΔͳΒɼάϧʔΦϯରͱਤ 1 ͱಉͷμΠΞάϥϜΛ௨ ߹ͰΔɻάϧʔΦϯཅ෦ʹԾతʹଘΔΒɼҎͷฑݱΕɼ750 GeV ͷεΧϥʔ LHC ʹΔཅ-িಥաఔΒੜ 185

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    1

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