Observation of the $$\Lambda_\text{b}^0\to J/\psi\Xi^-K^+$$ decay
- Yerevan Phys. Inst.
- Vienna, OAW
- Vienna, OAW; TU Vienna
- Antwerp U.
- Vrije U., Brussels
- Vrije U., Brussels; Gent U.
- Brussels U.
- Gent U.
- Louvain U.
- Rio de Janeiro, CBPF
- Rio de Janeiro State U.
- Rio de Janeiro State U.; U. Campinas
- Rio de Janeiro State U.; Rio Grande do Sul U.
- Rio Grande do Sul U.
- ABC Federal U.
- Sofiya, Inst. Nucl. Res.
- Sofiya U.
- Tarapaca U.
- Beihang U.
- Tsinghua U., Beijing; Nanjing Normal U.
- Tsinghua U., Beijing
- Tsinghua U., Beijing; Nanjing Normal U.; Iowa U.
- Beijing, Inst. High Energy Phys.; UCAS, Beijing
- Beijing, Inst. High Energy Phys.
- Peking U.
- SYSU, Guangzhou
- Hefei, CUST
- Fudan U.; Brussels U.
- Fudan U.
- Zhejiang U.
- Andes U., Bogota
- Antioquia U.
- Split Tech. U.
- Split U.
- Boskovic Inst., Zagreb
- Boskovic Inst., Zagreb; Unlisted
- Cyprus U.
- Charles U.
- Quito, Escuela Politecnica Natl.
- San Francisco de Quito U.
- Cairo, Acad. Sci. Res. Tech.; Cairo U.
- Cairo, Acad. Sci. Res. Tech.; Suez Canal U.; British U. in Egypt
- Fayoum U.
- NICPB, Tallinn
- Helsinki U.
- Helsinki Inst. of Phys.
- Lappeenranta U. Tech.
- IRFU, Saclay
- IRFU, Saclay; Purdue U.
- Ecole Polytechnique
- Strasbourg, IPHC; Haute Alsace U.
- Strasbourg, IPHC
- IP2I, Lyon
- IP2I, Lyon; Tsinghua U., Beijing
- GTU, Tbilisi
- GTU, Tbilisi; Unlisted
- Aachen, Tech. Hochsch.
- Aachen, Tech. Hochsch.; Erzincan U.
- DESY
- DESY; Hamburg U.
- DESY; Aachen, Tech. Hochsch.
- DESY; Isfahan Tech. U.
- DESY; Brandenburg Tech. U.
- DESY; IAS, Julich; Aachen, Tech. Hochsch.
- Hamburg U.
- KIT, Karlsruhe, EKP
- KIT, Karlsruhe, EKP; CERN
- KIT, Karlsruhe, IKP
- Democritos Nucl. Res. Ctr.
- Democritos Nucl. Res. Ctr.; CERN
- Athens U.
- Natl. Tech. U., Athens
- Ioannina U.
- Budapest, RMKI; U. Debrecen, Inst. Phys.
- Budapest, RMKI
- Budapest, RMKI; Debrecen, Inst. Nucl. Res.
- Eotvos U.
- Eotvos U.; Budapest, RMKI
- U. Debrecen, Inst. Phys.
- Debrecen, Inst. Nucl. Res.
- Debrecen, Inst. Nucl. Res.; U. Debrecen, Inst. Phys.
- EKU KRC, Gyongyos; Budapest, RMKI
- EKU KRC, Gyongyos
- Panjab U.
- Delhi U.
- Saha Inst.
- Saha Inst.; Visva Bharati U.
- Indian Inst. Tech., Madras
- Indian Inst. Tech., Madras; Bangalore, Indian Inst. Sci.
- TIFR, Mumbai, DHEP
- Tata Inst.
- Bhubaneswar, NISER; Indian Inst. Tech., Bhubaneswar
- Bhubaneswar, NISER
- Bhubaneswar, NISER; Bhubaneswar, Inst. Phys.
- IISER, Pune
- Isfahan Tech. U.; DESY
- Isfahan Tech. U.
- Isfahan Tech. U.; Sharif U. of Tech.
- IPM, Tehran
- University Coll., Dublin
- INFN, Bari
- Bari U.; Helwan U.
- Bari U.
- INFN, Bari; Helwan U.
- INFN, Bologna
- INFN, Bologna; ENEA, Bologna
- INFN, Catania
- Catania U.; INFN, Catania
- Florence U.; INFN, Florence
- INFN, Florence
- Frascati
- Frascati; Guglielmo Marconi U.
- INFN, Genoa
- INFN, Milan Bicocca; Milan Bicocca U.
- INFN, Milan Bicocca
- SSM, Naples; INFN, Naples
- INFN, Naples
- Naples U.
- CERN
- INFN, Padua; Trento U.
- Fermilab
- INFN, Padua
- INFN, Padua; Trento U.; Naples U.
- Ain Shams U., Cairo
- INFN, Pavia
- INFN, Perugia
- INFN, Perugia; Perugia U.
- Pisa, Scuola Normale Superiore
- INFN, Pisa
- Pisa U.
- INFN, Rome; Rome U.
- INFN, Rome
- INFN, Turin
- Turin U.
- Piemonte Orientale U., Alessandria
- INFN, Trieste
- CHEP, Taegu
- Chonnam Natl. U.
- Hanyang U.
- Korea U.
- Kyung Hee U.
- Sejong U.
- Seoul Natl. U.
- Seoul U.
- Yonsei U.
- Sungkyunkwan U.
- AUM, Kuwait
- Riga Tech. U.
- Unlisted
- Vilnius U.
- Malaya U.
- Sonora U.
- CINVESTAV, IPN
- CINVESTAV, IPN; Conacyt, Mexico
- Iberoamericana U.
- Puebla U., Inst. Fis.
- Montenegro U.
- Canterbury U.
- Quaid-i-Azam U.
- AGH-UST, Cracow
- NCBJ, Swierk
- Warsaw U.
- Warsaw U. of Tech.
- LIP, Lisbon
- Belgrade U.
- VINCA Inst. Nucl. Sci., Belgrade
- Madrid, CIEMAT
- Madrid, Autonoma U.
- Oviedo U.
- Cantabria Inst. of Phys.
- Colombo U.
- Ruhuna U.
- CERN; INFN, Pavia
- CERN; Athens U.
- PSI, Villigen; Zurich U.
- PSI, Villigen
- Zurich, ETH
- Zurich U.; Stefan Meyer Inst. Subatomare Phys.
- Zurich U.
- Taiwan, Natl. Central U.; Annecy, LAPP
- Taiwan, Natl. Central U.
- Taiwan, Natl. Central U.; Bangalore, Indian Inst. Sci.
- Taiwan, Natl. Taiwan U.
- Chulalongkorn U.
- Cukurova U.
- Cukurova U.; Adiyaman U.
- Middle East Tech. U., Ankara
- Bogazici U.
- Bogazici U.; Marmara U.
- Bogazici U.; Kafkas U.
- Istanbul Tech. U.
- Istanbul Tech. U.; Hacettepe U.
- Istanbul U.
- Istanbul U.; Adiyaman U.
- Istanbul U.; Yildiz Tech. U.
- Inst. Scintill. Mat., Kharkiv
- Kharkov, KIPT
- Bristol U.
- Bristol U.; Vrije U., Brussels
- Rutherford
- Rutherford; Southampton U.
- Rutherford; Bristol U.
- Imperial Coll., London
- Imperial Coll., London; Monash U.
- Imperial Coll., London; CERN
- Brunel U.
- Baylor U.
- Baylor U.; Unlisted
- Catholic U. America
- Alabama U.
- Boston U.
- Brown U.
- Brown U.; Aachen, Tech. Hochsch.
- Brown U.; Bethel Coll.
- Brown U.; Karamanoglu Mehmetbey U., Karaman
- UC, Davis
- UCLA
- UC, Riverside
- UC, San Diego
- UC, Santa Barbara
- Caltech
- Carnegie Mellon U.
- Colorado U.
- Cornell U.
- Fermilab; Caltech
- Fermilab; Naval Academy, Annapolis
- Florida U.
- Florida State U.
- Florida Inst. Tech.
- Florida Inst. Tech.; Ain Shams U., Cairo
- Illinois U., Chicago
- Iowa U.
- Iowa U.; Bingöl U.
- Iowa U.; GTU, Tbilisi
- Iowa U.; Sinop U.
- Johns Hopkins U.
- Kansas U.
- Kansas U.; Bucharest, IFIN-HH
- Kansas State U.
- LLNL, Livermore
- Maryland U.
- MIT
- Minnesota U.
- Mississippi U.
- Nebraska U.
- SUNY, Buffalo
- Northeastern U.
- Northwestern U.
- Notre Dame U.
- Notre Dame U.; Unlisted
- Ohio State U.
- Princeton U.
- Puerto Rico U., Mayaguez
- Purdue U.
- Purdue U., Calumet
- Rice U.
- Rochester U.
- Rochester U.; Unlisted
- Rockefeller U.
- Rutgers U., Piscataway
- Rutgers U., Piscataway; Brandenburg Tech. U.
- Tennessee U.
- Texas A-M
- Texas A-M; Texas A&M U. Qatar, Doha
- Texas A-M; CHEP, Taegu
- Texas Tech.
- Vanderbilt U.
- Virginia U.
- Wayne State U.
- Wisconsin U., Madison
- Higher Sch. of Economics, Moscow
- Unlisted; Antwerp U.
- Unlisted; Caltech
- Unlisted; Yerevan Phys. Inst.
- Unlisted; Northeastern U.
- Unlisted; Imperial Coll., London; Yerevan Phys. Inst.
- Unlisted; Tashkent, IYF
Using proton–proton collision data corresponding to an integrated luminosity of $$140\hbox { fb}^{-1}$$ collected by the CMS experiment at $$\sqrt{s}= 13\,\text {Te}\hspace{-.08em}\text {V} $$, the $${{{\Lambda }} _{\text {b}}^{{0}}} \rightarrow {{\text {J}/\uppsi }} {{{\Xi }} ^{{-}}} {{\text {K}} ^{{+}}} $$ decay is observed for the first time, with a statistical significance exceeding 5 standard deviations. The relative branching fraction, with respect to the $${{{\Lambda }} _{\text {b}}^{{0}}} \rightarrow {{{\uppsi }} ({2\textrm{S}})} {{\Lambda }} $$ decay, is measured to be $$\mathcal {B}({{{\Lambda }} _{\text {b}}^{{0}}} \rightarrow {{\text {J}/\uppsi }} {{{\Xi }} ^{{-}}} {{\text {K}} ^{{+}}} )/\mathcal {B}({{{\Lambda }} _{\text {b}}^{{0}}} \rightarrow {{{\uppsi }} ({2\textrm{S}})} {{\Lambda }} ) = [3.38\pm 1.02\pm 0.61\pm 0.03]\%$$, where the first uncertainty is statistical, the second is systematic, and the third is related to the uncertainties in $$\mathcal {B}({{{\uppsi }} ({2\textrm{S}})} \rightarrow {{\text {J}/\uppsi }} {{{\uppi }} ^{{+}}} {{{\uppi }} ^{{-}}} )$$ and $$\mathcal {B}({{{\Xi }} ^{{-}}} \rightarrow {{\Lambda }} {{{\uppi }} ^{{-}}} )$$.
- Research Organization:
- Haute Alsace U.; Notre Dame U.; Texas A-M; Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); KIT, Karlsruhe, IKP; Perugia U.; Helsinki Inst. of Phys.; Iberoamericana U.; LIP, Lisbon; Puerto Rico U., Mayaguez; Hanyang U.; Bucharest, IFIN-HH; Kansas U.; INFN, Bari; Antwerp U.; VINCA Inst. Nucl. Sci., Belgrade; Eotvos U.; TIFR, Mumbai, DHEP; INFN, Turin; Piemonte Orientale U., Alessandria; Baylor U.; Trento U.; Aachen, Tech. Hochsch.; AUM, Kuwait; Bogazici U.; SSM, Naples; U. Debrecen, Inst. Phys.; Florida U.; Bhubaneswar, Inst. Phys.; Split U.; Visva Bharati U.; IPM, Tehran; Sejong U.; Rio de Janeiro State U.; Nanjing Normal U.; Naval Academy, Annapolis; CINVESTAV, IPN; UCLA; Ruhuna U.; Inst. Scintill. Mat., Kharkiv; Catholic U. America; Antioquia U.; Yildiz Tech. U.; U. Campinas; Wisconsin U., Madison; Purdue U., Calumet; AGH-UST, Cracow; Beihang U.; Bhubaneswar, NISER; Florida Inst. Tech.; MIT; Guglielmo Marconi U.; Suez Canal U.; Natl. Tech. U., Athens; Warsaw U.; Quito, Escuela Politecnica Natl.; Sinop U.; Panjab U.; Adiyaman U.; Alabama U.; Kansas State U.; Rockefeller U.; Vienna, OAW; INFN, Catania; Fudan U.; Strasbourg, IPHC; Madrid, Autonoma U.; INFN, Pisa; UC, Davis; Cyprus U.; DESY; INFN, Rome; Beijing, Inst. High Energy Phys.; NCBJ, Swierk; Athens U.; Istanbul U.; Boskovic Inst., Zagreb; Iowa U.; Rice U.; IRFU, Saclay; Kyung Hee U.; INFN, Padua; Puebla U., Inst. Fis.; Pisa U.; Peking U.; Hefei, CUST; Sofiya, Inst. Nucl. Res.; Korea U.; Cairo U.; Milan Bicocca U.; Boston U.; Split Tech. U.; Tashkent, IYF; Cornell U.; UC, Riverside; KIT, Karlsruhe, EKP; Princeton U.; Marmara U.; Cairo, Acad. Sci. Res. Tech.; PSI, Villigen; Andes U., Bogota; Democritos Nucl. Res. Ctr.; Rio de Janeiro, CBPF; Lappeenranta U. Tech.; INFN, Naples; CHEP, Taegu; Debrecen, Inst. Nucl. Res.; Florence U.; CERN; INFN, Bologna; INFN, Perugia; Pisa, Scuola Normale Superiore; Seoul U.; Conacyt, Mexico; Riga Tech. U.; Colorado U.; Nebraska U.; Southampton U.; Gent U.; Annecy, LAPP; Ioannina U.; Sungkyunkwan U.; Florida State U.; Rutgers U., Piscataway; Helwan U.; Middle East Tech. U., Ankara; Minnesota U.; Zurich U.; Isfahan Tech. U.; University Coll., Dublin; British U. in Egypt; IAS, Julich; Seoul Natl. U.; EKU KRC, Gyongyos; Madrid, CIEMAT; Quaid-i-Azam U.; Catania U.; Louvain U.; Sharif U. of Tech.; Naples U.; Turin U.; Virginia U.; Johns Hopkins U.; Rome U.; San Francisco de Quito U.; IISER, Pune; Ain Shams U., Cairo; Vanderbilt U.; Kharkov, KIPT; Tennessee U.; Tsinghua U., Beijing; SYSU, Guangzhou; Maryland U.; INFN, Trieste; Malaya U.; Ohio State U.; Yerevan Phys. Inst.; INFN, Genoa; Unlisted; Bingöl U.; Indian Inst. Tech., Bhubaneswar; Istanbul Tech. U.; Delhi U.; Caltech; Purdue U.; Carnegie Mellon U.; NICPB, Tallinn; Rochester U.; Tata Inst.; Oviedo U.; Cukurova U.; Budapest, RMKI; Colombo U.; Texas Tech.; Zurich, ETH; Saha Inst.; Fayoum U.; Yonsei U.; Bethel Coll.; Northwestern U.; ENEA, Bologna; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Indian Inst. Tech., Madras; UC, San Diego; Chulalongkorn U.; Canterbury U.; ABC Federal U.; Sofiya U.; Bristol U.; Karamanoglu Mehmetbey U., Karaman; Tarapaca U.; Frascati; IP2I, Lyon; Higher Sch. of Economics, Moscow; GTU, Tbilisi; Illinois U., Chicago; Brandenburg Tech. U.; Charles U.; Imperial Coll., London; UCAS, Beijing; Vrije U., Brussels; Monash U.; Brunel U.; Hacettepe U.; Brown U.; Erzincan U.; Bangalore, Indian Inst. Sci.; INFN, Pavia; Wayne State U.; Chonnam Natl. U.; Northeastern U.; Taiwan, Natl. Taiwan U.; Cantabria Inst. of Phys.; Brussels U.; Helsinki U.; Belgrade U.; Vilnius U.; Montenegro U.; Rutherford; Hamburg U.; Taiwan, Natl. Central U.; Ecole Polytechnique; INFN, Florence; Mississippi U.; Sonora U.; Bari U.; Stefan Meyer Inst. Subatomare Phys.; Kafkas U.; UC, Santa Barbara; Zhejiang U.; TU Vienna; Texas A&M U. Qatar, Doha; SUNY, Buffalo; Rio Grande do Sul U.; Warsaw U. of Tech.; INFN, Milan Bicocca
- Sponsoring Organization:
- US Department of Energy
- Grant/Contract Number:
- AC02-07CH11359; 89243024CSC000002
- OSTI ID:
- 2298975
- Report Number(s):
- CMS-BPH-22-002; CERN-EP-2024-006; FERMILAB-PUB-24-0057-CMS; oai:inspirehep.net:2752469; arXiv:2401.16303
- Journal Information:
- Eur.Phys.J.C, Journal Name: Eur.Phys.J.C Journal Issue: 10 Vol. 84
- Country of Publication:
- United States
- Language:
- English
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