Abstract
Results are reported from a search for the anomalous production of highly boosted Z bosons with large transverse momentum and decaying to μ+μ−. Such Z bosons may be produced in the decays of new heavy particles. The search uses pp collision data at s=7 TeV, corresponding to an integrated luminosity of 5.0 fb−1 recorded with the CMS detector. The shape of the observed transverse momentum distribution of Z bosons is consistent with standard model expectations. Constraints are obtained on models predicting the production of excited quarks decaying via electroweak processes. Assuming a compositeness scale that is equal to the excited quark mass as well as transition coupling strengths between Z bosons and excited quarks that are equal to standard model couplings to quarks, masses of excited quarks below 1.94 TeVare excluded at the 95% confidence level. For excited quark production via a novel contact interaction, masses below 2.22 TeVare excluded, even if the excited quarks do not couple to gluons.
| Original language | English |
|---|---|
| Pages (from-to) | 28-47 |
| Number of pages | 20 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 722 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 13 May 2013 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2013 CERN
Funding
We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative staff at CERN and other CMS institutes, and acknowledge support from BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , and FAPESP (Brazil); MEYS (Bulgaria); CERN ; CAS , MoST , and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER , SF0690030s09 and ERDF (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Korea); LAS (Lithuania); CINVESTAV , CONACYT , SEP , and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON , RosAtom , RAS and RFBR (Russia); MSTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEP , IPST and NECTEC (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA).
| Funders | Funder number |
|---|---|
| Not added | ST/I505580/1, ST/H00081X/2, ST/H000925/1 |
| CPAN | |
| MON | |
| MSES | |
| MSHE | |
| MSTD | |
| MoER | SF0690030s09 |
| Swiss Funding Agencies | |
| TUBITAK | |
| ThEP | |
| UASLP-FAI | |
| National Science Foundation | 1151640, 1314131, 0969555, 1205960, 1211067 |
| U.S. Department of Energy | |
| Hispanics in Philanthropy | |
| Western Carolina University | |
| Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS) | |
| California Earthquake Authority | |
| Secretaría de Educación Pública | |
| Türkiye Atom Enerjisi Kurumu | |
| Seventh Framework Programme | 261323 |
| Louisiana Academy of Sciences | |
| CERN | |
| Institute for the Promotion of Teaching Science and Technology | |
| Science and Technology Facilities Council | ST/F007434/1, ST/L00609X/1, ST/I505572/1, ST/I005912/1, ST/J005665/1, ST/J004901/1, ST/K001604/1, ST/K001639/1, ST/K003844/1, GRIDPP, ST/F007094/1 |
| Department of Science and Technology, Ministry of Science and Technology, India | |
| Department of Atomic Energy, Government of India | |
| Ministry of Science and Innovation, New Zealand | |
| Taighde Éireann - Research Ireland | |
| Helmholtz-Gemeinschaft | |
| Deutsche Forschungsgemeinschaft | |
| Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung | 123501 |
| Fundação de Amparo à Pesquisa do Estado de São Paulo | |
| National Natural Science Foundation of China | |
| Research Promotion Foundation | |
| National Science Council | |
| Fundação para a Ciência e a Tecnologia | |
| Russian Foundation for Basic Research | |
| Coordenação de Aperfeiçoamento de Pessoal de Nível Superior | |
| Academy of Finland | |
| Bundesministerium für Bildung und Forschung | |
| Chinese Academy of Sciences | |
| Austrian Science Fund | |
| Fonds De La Recherche Scientifique - FNRS | |
| Russian Academy of Sciences | |
| Fonds Wetenschappelijk Onderzoek | |
| Consejo Nacional de Ciencia y Tecnología | |
| Ministerio de Economía y Competitividad | |
| Ministry of Education, Youth and Science | |
| General Secretariat for Research and Technology | |
| Hungarian Scientific Research Fund | |
| Conselho Nacional de Desenvolvimento Científico e Tecnológico | |
| National Research Foundation of Korea | |
| Joint Institute for Nuclear Research | |
| Nemzeti Kutatási és Technológiai Hivatal | |
| Instituto Nazionale di Fisica Nucleare | |
| Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro | |
| Ministry of Science and Technology, Taiwan | |
| National Academy of Sciences of Ukraine | |
| Centre National de la Recherche Scientifique | |
| Institute for Research in Fundamental Sciences | |
| Secretaría de Estado de Investigación, Desarrollo e Innovación | |
| Bundesministerium für Wissenschaft und Forschung | |
| European Regional Development Fund | |
| State Atomic Energy Corporation ROSATOM | |
| Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional | |
| Pakistan Atomic Energy Commission | |
| National Electronics and Computer Technology Center | |
| Institut National de Physique Nucléaire et de Physique des Particules |
Keywords
- CMS
- Dimuons
- Excited quarks
- New phenomena
- Physics