分支比R(D*)和R(D⁰) 比值的测量
Measurement of the Ratios of Branching Fractions R(D^{*}) and R(D^{0}).
作者信息
Aaij R, Abdelmotteleb A S W, Abellan Beteta C, Abudinén F, Ackernley T, Adeva B, Adinolfi M, Adlarson P, Afsharnia H, Agapopoulou C, Aidala C A, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Alessio F, Alexander M, Alfonso Albero A, Aliouche Z, Alvarez Cartelle P, Amalric R, Amato S, Amey J L, Amhis Y, An L, Anderlini L, Andersson M, Andreianov A, Andreotti M, Andreou D, Ao D, Archilli F, Artamonov A, Artuso M, Aslanides E, Atzeni M, Audurier B, Bachiller Perea I B, Bachmann S, Bachmayer M, Back J J, Bailly-Reyre A, Baladron Rodriguez P, Balagura V, Baldini W, Baptista de Souza Leite J, Barbetti M, Barlow R J, Barsuk S, Barter W, Bartolini M, Baryshnikov F, Basels J M, Bassi G, Batsukh B, Battig A, Bay A, Beck A, Becker M, Bedeschi F, Bediaga I B, Beiter A, Belin S, Bellee V, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Berninghoff D, Bernstein H C, Bertella C, Bertolin A, Betancourt C, Betti F, Bezshyiko Ia, Bhasin S, Bhom J, Bian L, Bieker M S, Biesuz N V, Billoir P, Biolchini A, Birch M, Bishop F C R, Bitadze A, Bizzeti A, Blago M P, Blake T, Blanc F, Blank J E, Blusk S, Bobulska D, Boelhauve J A, Boente Garcia O, Boettcher T, Boldyrev A, Bolognani C S, Bolzonella R, Bondar N, Borgato F, Borghi S, Borsato M, Borsuk J T, Bouchiba S A, Bowcock T J V, Boyer A, Bozzi C, Bradley M J, Braun S, Brea Rodriguez A, Brodzicka J, Brossa Gonzalo A, Brown J, Brundu D, Buonaura A, Buonincontri L, Burke A T, Burr C, Bursche A, Butkevich A, Butter J S, Buytaert J, Byczynski W, Cadeddu S, Cai H, Calabrese R, Calefice L, Cali S, Calvi M, Calvo Gomez M, Campana P, Campora Perez D H, Campoverde Quezada A F, Capelli S, Capriotti L, Carbone A, Cardinale R, Cardini A, Carniti P, Carus L, Casais Vidal A, Caspary R, Casse G, Cattaneo M, Cavallero G, Cavallini V, Celani S, Cerasoli J, Cervenkov D, Chadwick A J, Chahrour I, Chapman M G, Charles M, Charpentier Ph, Chavez Barajas C A, Chefdeville M, Chen C, Chen S, Chernov A, Chernyshenko S, Chobanova V, Cholak S, Chrzaszcz M, Chubykin A, Chulikov V, Ciambrone P, Cicala M F, Cid Vidal X, Ciezarek G, Cifra P, Ciullo G, Clarke P E L, Clemencic M, Cliff H V, Closier J, Cobbledick J L, Coco V, Coelho J A B, Cogan J, Cogneras E, Cojocariu L, Collins P, Colombo T, Congedo L, Contu A, Cooke N, Corredoira I, Corti G, Couturier B, Craik D C, Cruz Torres M, Currie R, Da Silva C L, Dadabaev S, Dai L, Dai X, Dall'Occo E, Dalseno J, D'Ambrosio C, Daniel J, Danilina A, d'Argent P, Davies J E, Davis A, De Aguiar Francisco O, de Boer J, De Bruyn K, De Capua S, De Cian M, De Freitas Carneiro Da Graca U, De Lucia E, De Miranda J M, De Paula L, De Serio M, De Simone D, De Simone P, De Vellis F, de Vries J A, Dean C T, Debernardis F, Decamp D, Dedu V, Del Buono L, Delaney B, Dembinski H-P, Denysenko V, Deschamps O, Dettori F, Dey B, Di Nezza P, Diachkov I, Didenko S, Dieste Maronas L, Ding S, Dobishuk V, Dolmatov A, Dong C, Donohoe A M, Dordei F, Dos Reis A C, Douglas L, Downes A G, Duda P, Dudek M W, Dufour L, Duk V, Durante P, Duras M M, Durham J M, Dutta D, Dziurda A, Dzyuba A, Easo S, Egede U, Egorychev V, Eirea Orro C, Eisenhardt S, Ejopu E, Ek-In S, Eklund L, Elashri M E, Ellbracht J, Ely S, Ene A, Epple E, Escher S, Eschle J, Esen S, Evans T, Fabiano F, Falcao L N, Fan Y, Fang B, Fantini L, Faria M, Farry S, Fazzini D, Felkowski L F, Feo M, Fernandez Gomez M, Fernez A D, Ferrari F, Ferreira Lopes L, Ferreira Rodrigues F, Ferreres Sole S, Ferrillo M, Ferro-Luzzi M, Filippov S, Fini R A, Fiorini M, Firlej M, Fischer K M, Fitzgerald D S, Fitzpatrick C, Fiutowski T, Fleuret F, Fontana M, Fontanelli F, Forty R, Foulds-Holt D, Franco Lima V, Franco Sevilla M, Frank M, Franzoso E, Frau G, Frei C, Friday D A, Frontini L, Fu J, Fuehring Q, Fulghesu T, Gabriel E, Galati G, Galati M D, Gallas Torreira A, Galli D, Gambetta S, Gandelman M, Gandini P, Gao Y, Gao Y, Garau M, Garcia Martin L M, Garcia Moreno P, García Pardiñas J, Garcia Plana B, Garcia Rosales F A, Garrido L, Gaspar C, Geertsema R E, Gerick D, Gerken L L, Gersabeck E, Gersabeck M, Gershon T, Giambastiani L, Gibson V, Giemza H K, Gilman A L, Giovannetti M, Gioventù A, Gironella Gironell P, Giugliano C, Giza M A, Gizdov K, Gkougkousis E L, Gligorov V V, Göbel C, Golobardes E, Golubkov D, Golutvin A, Gomes A, Gomez Fernandez S, Goncalves Abrantes F, Goncerz M, Gong G, Gorelov I V, Gotti C, Grabowski J P, Grammatico T, Granado Cardoso L A, Graugés E, Graverini E, Graziani G, Grecu A T, Greeven L M, Grieser N A, Grillo L, Gromov S, Gruberg Cazon B R, Gu C, Guarise M, Guittiere M, Günther P A, Gushchin E, Guth A, Guz Y, Gys T, Hadavizadeh T, Hadjivasiliou C, Haefeli G, Haen C, Haimberger J, Haines S C, Halewood-Leagas T, Halvorsen M M, Hamilton P M, Hammerich J, Han Q, Han X, Hansen E B, Hansmann-Menzemer S, Hao L, Harnew N, Harrison T, Hasse C, Hatch M, He J, Heijhoff K, Hemmer F H, Henderson C, Henderson R D L, Hennequin A M, Hennessy K, Henry L, Herd J, Heuel J, Hicheur A, Hill D, Hilton M, Hollitt S E, Horswill J, Hou R, Hou Y, Hu J, Hu J, Hu W, Hu X, Huang W, Huang X, Hulsbergen W, Hunter R J, Hushchyn M, Hutchcroft D, Ibis P, Idzik M, Ilin D, Ilten P, Inglessi A, Iniukhin A, Ishteev A, Ivshin K, Jacobsson R, Jage H, Jaimes Elles S J, Jakobsen S, Jans E, Jashal B K, Jawahery A, Jevtic V, Jiang E, Jiang X, Jiang Y, John M, Johnson D, Jones C R, Jones T P, Jost B, Jurik N, Juszczak I, Kandybei S, Kang Y, Karacson M, Karpenkov D, Karpov M, Kautz J W, Keizer F, Keller D M, Kenzie M, Ketel T, Khanji B, Kharisova A, Kholodenko S, Khreich G, Kirn T, Kirsebom V S, Kitouni O, Klaver S, Kleijne N, Klimaszewski K, Kmiec M R, Koliiev S, Kolk L, Kondybayeva A, Konoplyannikov A, Kopciewicz P, Kopecna R, Koppenburg P, Korolev M, Kostiuk I, Kot O, Kotriakhova S, Kozachuk A, Kravchenko P, Kravchuk L, Krawczyk R D, Kreps M, Kretzschmar S, Krokovny P, Krupa W, Krzemien W, Kubat J, Kubis S, Kucewicz W, Kucharczyk M, Kudryavtsev V, Kulikova E K, Kupsc A, Lacarrere D, Lafferty G, Lai A, Lampis A, Lancierini D, Landesa Gomez C, Lane J J, Lane R, Langenbruch C, Langer J, Lantwin O, Latham T, Lazzari F, Lazzaroni M, Le Gac R, Lee S H, Lefèvre R, Leflat A, Legotin S, Lenisa P, Leroy O, Lesiak T, Leverington B, Li A, Li H, Li K, Li P, Li P-R, Li S, Li T, Li T, Li Y, Li Z, Liang X, Lin C, Lin T, Lindner R, Lisovskyi V, Litvinov R, Liu G, Liu H, Liu Q, Liu S, Lobo Salvia A, Loi A, Lollini R, Lomba Castro J, Longstaff I, Lopes J H, Lopez Huertas A, López Soliño S, Lovell G H, Lu Y, Lucarelli C, Lucchesi D, Luchuk S, Lucio Martinez M, Lukashenko V, Luo Y, Lupato A, Luppi E, Lusiani A, Lynch K, Lyu X-R, Ma R, Maccolini S, Machefert F, Maciuc F, Mackay I, Macko V, Madhan Mohan L R, Maevskiy A, Maisuzenko D, Majewski M W, Malczewski J J, Malde S, Malecki B, Malinin A, Maltsev T, Manca G, Mancinelli G, Mancuso C, Manera Escalero R, Manuzzi D, Manzari C A, Marangotto D, Marchand J F, Marconi U, Mariani S, Marin Benito C, Marks J, Marshall A M, Marshall P J, Martelli G, Martellotti G, Martinazzoli L, Martinelli M, Martinez Santos D, Martinez Vidal F, Massafferri A, Materok M, Matev R, Mathad A, Matiunin V, Matteuzzi C, Mattioli K R, Mauri A, Maurice E, Mauricio J, Mazurek M, McCann M, Mcconnell L, McGrath T H, McHugh N T, McNab A, McNulty R, Mead J V, Meadows B, Meier G, Melnychuk D, Meloni S, Merk M, Merli A, Meyer Garcia L, Miao D, Mikhasenko M, Milanes D A, Millard E, Milovanovic M, Minard M-N, Minotti A, Miralles T, Mitchell S E, Mitreska B, Mitzel D S, Mödden A, Mohammed R A, Moise R D, Mokhnenko S, Mombächer T, Monk M, Monroy I A, Monteil S, Morello G, Morello M J, Morgenthaler M P, Moron J, Morris A B, Morris A G, Mountain R, Mu H, Muhammad E, Muheim F, Mulder M, Müller K, Murphy C H, Murray D, Murta R, Muzzetto P, Naik P, Nakada T, Nandakumar R, Nanut T, Nasteva I, Needham M, Neri N, Neubert S, Neufeld N, Neustroev P, Newcombe R, Nicolini J, Nicotra D, Niel E M, Nieswand S, Nikitin N, Nolte N S, Normand C, Novoa Fernandez J, Nowak G N, Nunez 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机构信息
Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands.
Department of Physics, University of Warwick, Coventry, United Kingdom.
出版信息
Phys Rev Lett. 2023 Sep 15;131(11):111802. doi: 10.1103/PhysRevLett.131.111802.
The ratios of branching fractions R(D^{})≡B(B[over ¯]→D^{}τ^{-}ν[over ¯]{τ})/B(B[over ¯]→D^{*}μ^{-}ν[over ¯]{μ}) and R(D^{0})≡B(B^{-}→D^{0}τ^{-}ν[over ¯]{τ})/B(B^{-}→D^{0}μ^{-}ν[over ¯]{μ}) are measured, assuming isospin symmetry, using a sample of proton-proton collision data corresponding to 3.0 fb^{-1} of integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The tau lepton is identified in the decay mode τ^{-}→μ^{-}ν_{τ}ν[over ¯]_{μ}. The measured values are R(D^{*})=0.281±0.018±0.024 and R(D^{0})=0.441±0.060±0.066, where the first uncertainty is statistical and the second is systematic. The correlation between these measurements is ρ=-0.43. The results are consistent with the current average of these quantities and are at a combined 1.9 standard deviations from the predictions based on lepton flavor universality in the standard model.
在假定同位旋对称性的情况下，利用大型强子对撞机底夸克实验（LHCb）在2011年和2012年记录的积分亮度为3.0 fb⁻¹的质子 - 质子碰撞数据样本，测量了分支比的比值R(D⁎)≡B(B⁻→D⁎τ⁻ν̅τ)/B(B⁻→D⁎μ⁻ν̅μ)和R(D⁰)≡B(B⁻→D⁰τ⁻ν̅τ)/B(B⁻→D⁰μ⁻ν̅μ)。τ轻子通过衰变模式τ⁻→μ⁻ντν̅μ来识别。测量值为R(D⁎)=0.281±0.018±0.024和R(D⁰)=0.441±0.060±0.066，其中第一个不确定度是统计性的，第二个是系统性的。这些测量之间的相关性为ρ = -0.43。结果与这些量的当前平均值一致，并且相对于基于标准模型中轻子味普适性的预测，组合偏差为1.9个标准差。
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