Published October 23, 2014 | Version v1
Publication Open

Search for the lepton flavor violating decay<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Z</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>e</mml:mi><mml:mi>μ</mml:mi></mml:mrow></mml:math>in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math>collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:mi>s</mml:mi…

Creators

  • 1. Institut National de Physique Nucléaire et de Physique des Particules
  • 2. Centre National de la Recherche Scientifique
  • 3. Aix-Marseille Université
  • 4. University of Oklahoma
  • 5. Institute of Physics, Academia Sinica
  • 6. Université Paris-Sud
  • 7. Azerbaijan National Academy of Sciences
  • 8. University of Amsterdam
  • 9. National Institute for Subatomic Physics
  • 10. Oklahoma State University
  • 11. Michigan State University
  • 12. University of Toronto
  • 13. Tel Aviv University
  • 14. Technion – Israel Institute of Technology
  • 15. European Organization for Nuclear Research
  • 16. Stockholm University
  • 17. The Abdus Salam International Centre for Theoretical Physics (ICTP)
  • 18. INFN Sezione di Trieste
  • 19. AGH University of Krakow
  • 20. Brookhaven National Laboratory
  • 21. Yale University
  • 22. Ludwig-Maximilians-Universität München
  • 23. Rutherford Appleton Laboratory
  • 24. University of Belgrade
  • 25. Universidad de Granada
  • 26. LIP - Laboratory of Instrumentation and Experimental Particle Physics
  • 27. University of Bern
  • 28. Boston University
  • 29. Joint Institute for Nuclear Research
  • 30. University of Rome Tor Vergata
  • 31. INFN Sezione di Roma II
  • 32. Lund University
  • 33. The University of Tokyo
  • 34. P.N. Lebedev Physical Institute of the Russian Academy of Sciences
  • 35. Osservatorio astronomico di Bologna
  • 36. University of Bologna
  • 37. INFN Sezione di Bologna
  • 38. University of Victoria
  • 39. Université Grenoble Alpes
  • 40. Laboratoire de Physique Subatomique et de Cosmologie
  • 41. Instituto de Física La Plata
  • 42. Consejo Nacional de Investigaciones Científicas y Técnicas
  • 43. Universidad Nacional de La Plata
  • 44. University of Geneva
  • 45. National Technical University of Athens
  • 46. University of Udine
  • 47. INFN Sezione di Milano
  • 48. University of Chicago
  • 49. Fermi National Accelerator Laboratory
  • 50. University of Birmingham
  • 51. Lancaster University
  • 52. University of Liverpool
  • 53. INFN Sezione di Napoli
  • 54. University of Copenhagen
  • 55. Queen Mary University of London
  • 56. Columbia University
  • 57. High Energy Accelerator Research Organization
  • 58. Universidade Federal do Rio de Janeiro
  • 59. Brandeis University
  • 60. University of Michigan–Ann Arbor
  • 61. Heidelberg University
  • 62. University of Coimbra
  • 63. University of Lisbon
  • 64. University of Freiburg
  • 65. University of Sheffield
  • 66. University of Milan
  • 67. National and Kapodistrian University of Athens
  • 68. TU Dresden
  • 69. University College London
  • 70. Budker Institute of Nuclear Physics
  • 71. Siberian Branch of the Russian Academy of Sciences
  • 72. Universitat Autònoma de Barcelona
  • 73. Institute for High Energy Physics
  • 74. National Laboratory of Frascati
  • 75. Moscow Engineering Physics Institute
  • 76. Slovak Academy of Sciences
  • 77. Institute of Experimental Physics
  • 78. INFN Sezione di Roma I
  • 79. University of Oxford
  • 80. SLAC National Accelerator Laboratory
  • 81. Duke University
  • 82. Institute of Particle Physics
  • 83. Université de Montréal
  • 84. Boğaziçi University

Description

The ATLAS detector at the Large Hadron Collider is used to search for the lepton flavor violating process $Z\ensuremath{\rightarrow}e\ensuremath{\mu}$ in $pp$ collisions using $20.3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data collected at $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$. An enhancement in the $e\ensuremath{\mu}$ invariant mass spectrum is searched for at the $Z$-boson mass. The number of $Z$ bosons produced in the data sample is estimated using events of similar topology, $Z\ensuremath{\rightarrow}ee$ and $\ensuremath{\mu}\ensuremath{\mu}$, significantly reducing the systematic uncertainty in the measurement. There is no evidence of an enhancement at the $Z$-boson mass, resulting in an upper limit on the branching fraction, $\mathcal{B}(Z\ensuremath{\rightarrow}e\ensuremath{\mu})<7.5\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}7}$ at the 95% confidence level.

⚠️ This is an automatic machine translation with an accuracy of 90-95%

Translated Description (Arabic)

يستخدم كاشف الأطلس في مصادم الهدرونات الكبير للبحث عن نكهة اللبتون التي تنتهك العملية $Z\ ensuremath {\ rightarrow}e\ ensuremath {\mu }$ في $pp$ اصطدامات باستخدام $ 20.3\text{}\ text {} {\ mathrm{fb }}^{\ ensuremath {-} 1 }$ من البيانات التي تم جمعها في $\sqrt{s }=8\text {}\text {}\mathrm{TeV }$. يتم البحث عن تحسين في الطيف الكتلي الثابت $e\ ensuremath {\mu }$ في كتلة $Z$- boson. يتم تقدير عدد بوزونات $Z$ المنتجة في عينة البيانات باستخدام أحداث طوبولوجيا مماثلة، $Z\ ensuremath {\ rightarrow}ee$ و $\ ensuremath {\ mu}\ensuremath {\ mu}$، مما يقلل بشكل كبير من عدم اليقين المنهجي في القياس. لا يوجد دليل على وجود تعزيز في كتلة $Z$- boson، مما يؤدي إلى حد أعلى على جزء التفرع، $\mathcal{B}(Z\ ensuremath {\ rightarrow}e\ ensuremath {\mu})<7.5\ ifmmode\ times\ else\ texttimes\fi {}1{0 }^{\ ensuremath {-} 7 }$ عند مستوى ثقة 95 ٪.

Translated Description (French)

Le détecteur ATLAS du Grand collisionneur de hadrons est utilisé pour rechercher le processus de violation de la saveur lepton $Z\ ensuremath {\rightarrow}e\ ensuremath {\mu}$ dans $pp$ collisions en utilisant $ 20.3\text{ }\text{ }{\mathrm{fb}}^{\ ensuremath {-}1}$ de données collectées à $ \sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$ . Une amélioration du spectre de masse invariant $e\ensuremath {\mu}$ est recherchée à la masse du $Z$ -boson. Le nombre de $Z$ bosons produits dans l'échantillon de données est estimé à l'aide d'événements de topologie similaire, $Z\ ensuremath {\rightarrow}ee$ et $ \ensuremath{\mu}\ensuremath{\mu}$ , ce qui réduit considérablement l'incertitude systématique de la mesure. Il n'y a aucune preuve d'une amélioration à la masse $Z$ -boson, entraînant une limite supérieure sur la fraction de branchement, $ \mathcal{B}(Z\ ensuremath {\rightarrow}e\ ensuremath {\mu})<7,5\ ifmmode\times\else\ texttimes\fi{}1{0}^{\ ensuremath {-}7}$ au niveau de confiance de 95 %.

Translated Description (Spanish)

El detector ATLAS en el Gran Colisionador de Hadrones se utiliza para buscar el proceso que infringe el sabor del leptón $Z\ ensuremath {\rightarrow}e\ ensuremath {\mu}$ en colisiones de $ pp $ utilizando $ 20.3\text{ }\text{ } {\mathrm{fb}}^{\ ensuremath {-}1}$ de datos recopilados en $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$. Se busca una mejora en el espectro de masas $e\ ensuremath {\mu} $ invariante en la masa $Z$ -boson. El número de $Z$ bosones producidos en la muestra de datos se estima utilizando eventos de topología similar, $Z\ensuremath{\rightarrow}ee$ y $\ ensuremath {\mu}\ ensuremath {\mu}$, lo que reduce significativamente la incertidumbre sistemática en la medición. No hay evidencia de una mejora en la masa de $Z$ -bosón, lo que resulta en un límite superior en la fracción de ramificación, $\mathcal{B}(Z\ ensuremath {\rightarrow}e\ ensuremath {\mu})<7.5\ ifmmode\times\else\ texttimes\fi{}1{0}^{\ ensuremath {-}7}$ al nivel de confianza del 95%.

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PhysRevD.90.072010.pdf

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Additional details

Additional titles

Translated title (Arabic)
ابحث عن نكهة اللبتون التي تنتهك الاضمحلال<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Z</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>e</mml:mi><mml:mi>μ</mml:mi></mml:mrow></mml:math>في تصادمات<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi> p</mml:mi><mml:mi>p</mml:mi></mml:math> عند<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:mi>s&lt;/ mml:mi...
Translated title (French)
Recherche de la saveur lepton violant la désintégration<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Z</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>e</mml:mi><mml:mi>μ</mml:mi></mml:mrow></mml:math>dans les collisions<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi> p</mml:mi><mml:mi>p</mml:mi></mml:math> à<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:mi>s&lt;/mml :mi…
Translated title (Spanish)
Busque el sabor del leptón que viola la descomposición<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Z</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>e</mml:mi><mml:mi>μ</mml:mi></mml:mrow></mml:math>en<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math>colisiones en<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:mi>s&lt;/mml:mi...

Identifiers

Other
https://openalex.org/W2140687207
DOI
10.1103/physrevd.90.072010

Is supplement to
https://openalex.org/W4319604607 (Other)
https://openalex.org/W4296528997 (Other)
https://openalex.org/W4286750865 (Other)
https://openalex.org/W4221151662 (Other)
https://openalex.org/W2940325752 (Other)
https://openalex.org/W2892006596 (Other)
https://openalex.org/W2766512279 (Other)
https://openalex.org/W2748952813 (Other)
https://openalex.org/W2229639430 (Other)
https://openalex.org/W1972404522 (Other)

GreSIS Basics Section

Is Global South Knowledge
Yes
Country
Argentina

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