Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer

The CMS collaboration; The TOTEM collaboration

doi:10.1007/JHEP07(2018)153

Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer

The CMS collaboration
, The TOTEM collaboration

Yerevan Physics Institute
Institut für Hochenergiephysik
Vienna University of Technology
Institute for Nuclear Problems of Belarusian State University
University of Antwerp
Université Paris-Saclay
c/o DESY
Vrjie Universiteit Brussel
Université Libre de Bruxelles
Ghent University
University of Louvain
Centro Brasileiro de Pesquisas Fisicas
Rua São Francisco de Xavier
University of Campinas (UNICAMP)
Universidade Federal do Rio Grande do Sul
Universidade Federal de Pelotas
São Paulo State University
Federal University of ABC (UFABC)
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
University of Sofia
Beihang University
Institute of High Energy Physics, Chinese Academy of Sciences
State Key Laboratory of Nuclear Physics and Technology
Tsinghua University
Universidad de Los Andes, Colombia
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split
Faculty of Science, University of Split
Ruđer Bošković Institute
Institute for Theoretical and Experimental Physics
University of Cyprus
Charles University
Joint Institute for Nuclear Research, Dubna
Universidad San Francisco de Quito
Egyptian Network of High Energy Physics
Cairo University
Zewail City of Science and Technology
British University in Egypt
Ain Shams University
National Institute of Chemical Physics and Biophysics, Tallinn
University of Helsinki
Helsinki Institute of Physics
LUT University
King Abdulaziz University
Université de Strasbourg
Université de Haute Alsace
Université Paris-Sud
IGFL, Université de Lyon, Université Lyon 1
Moscow State University
Georgian Technical University
Tbilisi State University
RWTH Aachen University
European Organization for Nuclear Research
Universität Hamburg
Joint Faculty of the Brandenburg University of Technology Cottbus Senftenberg
Institute of Meteorology and Climate Research
NCSR Demokritos
University of Athens
National Technical University of Athens
University of Ioannina
Eötvös Loránd University
Wigner Research Centre for Physics
Institute of Nuclear Research ATOMKI
University of Debrecen
Indian Institute of Science
National Institute of Science Education and Research
IIT Bhubaneswar
Institute of Physics Bhubaneswar
Panjab University
University of Delhi
Saha Institute of Nuclear Physics
Shoolini University
Indian Institute of Technology Madras
Bhabha Atomic Research Centre
Tata Institute of Fundamental Research, Mumbai
University of Visva-Bharati
University of Ruhuna
Indian Institute of Science Education and Research (IISER)
Institute for Research in Fundamental Sciences (IPM)
Isfahan University of Technology
Yazd University
Islamic Azad University, Science and Research Branch
University College Dublin
INFN Sezione di Bari
Università degli studi di Bari Aldo Moro
Politecnico di Bari
INFN Sezione di Bologna
University of Bologna
INFN Sezione di Catania
Università degli Studi di Catania
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
University of Florence
University of Siena
LNF-INFN
Sezione di Genova
University of Genoa
INFN Sezione di Milano-Bicocca
University of Milano-Bicocca
INFN Sezione di Napoli
Università degli Studi della Basilicata
Università G. Marconi
University of Naples Federico II
INFN
University of Padova
INFN Sezione di Pavia
University of Pavia
INFN Sezione di Perugia
University of Perugia
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
University of Pisa
Scuola Normale Superiore di Pisa
Sezione di Roma
University of Rome
INFN Sezione di Torino
University of Turin
Laboratory of Molecular Pathology
INFN Sezione di Trieste
University of Trieste
Kyungpook National University
Chonnam National University
Hanyang University
Korea University
Seoul National University
University of Seoul
Sungkyunkwan University
Vilnius University
University Malaya
International Islamic University of Malaysia
MOSTI
CINVESTAV-IPN
Consejo Nacional de Ciencia y Tecnología
Universidad Iberoamericana
Benemerita Universidad Autonoma de Puebla
Universidad Autónoma de San Luis Potosi
University of Auckland
University of Canterbury
Quaid-i-Azam University
National Centre for Nuclear Research
University of Warsaw
Warsaw University of Technology
Lisboa
Institute for Nuclear Research of the Russian Academy of Sciences
National Research Nuclear University MEPhI
Petersburg Nuclear Physics Institute (PNPI)
St. Petersburg State Polytechnical University
University of Florida
Moscow Institute of Physics and Technology
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
California Institute of Technology
Novosibirsk State University
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
Kurchatov Institute
National Research Tomsk Polytechnic University
University of Belgrade
University of Belgrade
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT)
Universidad Autónoma de Madrid
University of Oviedo
CSIC-Univ. Cantabria
Riga Technical University
Paul Scherrer Institut
University of Zurich
ETH Zurich
Stefan Meyer Institute for Subatomic Physics (SMI)
National Central University
National Taiwan University
Chulalongkorn University
Cukurova University
Adiyaman University
Istanbul Aydin University
Mersin University
Piri Reis University
Middle East Technical University (METU)
Izmir Institute of Technology
Necmettin Erbakan University
Bogazici University
Marmara University
Kafkas University
Istanbul Bilgi University
Istanbul Technical University
Academy of Science of Ukraine
Kharkov Institute of Physics and Technology
University of Bristol
CCLRC Rutherford Appleton Laboratory
University of Southampton
Imperial College London
Monash University
Instituto de Astrofisica de Canarias
Brunel University London
Baylor University
Catholic University of America
University of Alabama
Boston University
Women and Infants Hospital of Rhode Island-Warren Alpert Medical School of Brown University
Bethel University
University of California, Davis
University of California, Los Angeles
University of California, Riverside
University of California, San Diego
Utah Valley University
University of California, Santa Barbara
Carnegie Mellon University
University of Colorado Boulder
Cornell University
Fermi National Accelerator Laboratory
Purdue University
Florida International University
Florida State University
Florida Institute of Technology
University of Illinois at Chicago
University of Iowa
Beykent University
Bingol University
Erzincan University
Sinop University
Mimar Sinan University
Johns Hopkins University
University of Kansas
Kansas State University
Lawrence Livermore National Laboratory
University of Maryland, College Park
Massachusetts Institute of Technology
University of Minnesota Twin Cities
University of Mississippi
University of Nebraska-Lincoln
University at Buffalo, The State University of New York
Northeastern University
Northwestern University
University of Notre Dame
The Ohio State University
Princeton University
University of Puerto Rico
Purdue University Northwest
Rice University
University of Rochester
The Rockefeller University
Rutgers University–New Brunswick
University of Tennessee
Texas A&M University
Texas A&M University at Qatar
Texas Tech University
Vanderbilt University
University of Virginia
Wayne State University
University of Wisconsin-Madison
Agh University of Science and Technology Faculty of Computer Science
EKU KRC
Czech Technical University in Prague
Case Western Reserve University
Ioffe Institute
University of West Bohemia
Institute for Nuclear Physics
Tomsk State University
of Sciences
Stanford Linear Accelerator Center

Research output: Contribution to journal › Article › peer-review

Abstract

The process pp → pℓ⁺ℓ⁻p^(*), with ℓ⁺ℓ⁻ a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the first time at the LHC in pp collisions at s=13 TeV. One of the two scattered protons is measured in the CMS-TOTEM precision proton spectrometer (CT-PPS), which operated for the first time in 2016. The second proton either remains intact or is excited and then dissociates into a low-mass state p^*, which is undetected. The measurement is based on an integrated luminosity of 9.4 fb⁻¹ collected during standard, high-luminosity LHC operation. A total of 12 μ⁺μ⁻ and 8 e⁺e⁻ pairs with m(ℓ⁺ℓ⁻) > 110 GeV, and matching forward proton kinematics, are observed, with expected backgrounds of 1.49 ± 0.07 (stat) ± 0.53 (syst) and 2.36 ± 0.09 (stat) ± 0.47 (syst), respectively. This corresponds to an excess of more than five standard deviations over the expected background. The present result constitutes the first observation of proton-tagged γγ collisions at the electroweak scale. This measurement also demonstrates that CT-PPS performs according to the design specifications.[Figure not available: see fulltext.].

Original language	English
Article number	153
Journal	Journal of High Energy Physics
Volume	2018
Issue number	7
DOIs	https://doi.org/10.1007/JHEP07(2018)153
Publication status	Published - 1 Jul 2018
Externally published	Yes

Keywords

Forward physics
Hadron-Hadron scattering (experiments)
Photon production
proton-proton scattering

Access to Document

10.1007/JHEP07(2018)153

Cite this

@article{a13bd81807be43bcb82b19dfa5cd0ec7,

title = "Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer",

abstract = "The process pp → pℓ+ℓ−p(*), with ℓ+ℓ− a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the first time at the LHC in pp collisions at s=13 TeV. One of the two scattered protons is measured in the CMS-TOTEM precision proton spectrometer (CT-PPS), which operated for the first time in 2016. The second proton either remains intact or is excited and then dissociates into a low-mass state p*, which is undetected. The measurement is based on an integrated luminosity of 9.4 fb−1 collected during standard, high-luminosity LHC operation. A total of 12 μ+μ− and 8 e+e− pairs with m(ℓ+ℓ−) > 110 GeV, and matching forward proton kinematics, are observed, with expected backgrounds of 1.49 ± 0.07 (stat) ± 0.53 (syst) and 2.36 ± 0.09 (stat) ± 0.47 (syst), respectively. This corresponds to an excess of more than five standard deviations over the expected background. The present result constitutes the first observation of proton-tagged γγ collisions at the electroweak scale. This measurement also demonstrates that CT-PPS performs according to the design specifications.[Figure not available: see fulltext.].",

keywords = "Forward physics, Hadron-Hadron scattering (experiments), Photon production, proton-proton scattering",

author = "\{The CMS collaboration\} and \{The TOTEM collaboration\} and Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and F. Ambrogi and E. Asilar and T. Bergauer and J. Brandstetter and E. Brondolin and M. Dragicevic and J. Er{\"o} and \{Escalante Del Valle\}, A. and M. Flechl and M. Friedl and R. Fr{\"u}hwirth and Ghete, \{V. M.\} and J. Grossmann and J. Hrubec and M. Jeitler and A. K{\"o}nig and N. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Madlener and I. Mikulec and E. Pree and N. Rad and H. Rohringer and J. Schieck and R. Sch{\"o}fbeck and M. Spanring and D. Spitzbart and A. Taurok and W. Waltenberger and J. Wittmann and Wulz, \{C. E.\} and M. Zarucki and V. Chekhovsky and V. Mossolov and \{Suarez Gonzalez\}, J. and \{De Wolf\}, \{E. A.\} and \{Di Croce\}, D. and F. Beaudette and \{Granier de Cassagnac\}, R. and M. Nguyen and C. Ochando and P. Paganini and R. Salerno and A. Zabi and A. Zghiche and \{De Wit\}, A.",

note = "Publisher Copyright: {\textcopyright} 2018, The Author(s).",

year = "2018",

month = jul,

day = "1",

doi = "10.1007/JHEP07(2018)153",

language = "English",

volume = "2018",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

number = "7",

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TY - JOUR

T1 - Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer

AU - The CMS collaboration

AU - The TOTEM collaboration

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Ambrogi, F.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Brondolin, E.

AU - Dragicevic, M.

AU - Erö, J.

AU - Escalante Del Valle, A.

AU - Flechl, M.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Grossmann, J.

AU - Hrubec, J.

AU - Jeitler, M.

AU - König, A.

AU - Krammer, N.

AU - Krätschmer, I.

AU - Liko, D.

AU - Madlener, T.

AU - Mikulec, I.

AU - Pree, E.

AU - Rad, N.

AU - Rohringer, H.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Spanring, M.

AU - Spitzbart, D.

AU - Taurok, A.

AU - Waltenberger, W.

AU - Wittmann, J.

AU - Wulz, C. E.

AU - Zarucki, M.

AU - Chekhovsky, V.

AU - Mossolov, V.

AU - Suarez Gonzalez, J.

AU - De Wolf, E. A.

AU - Di Croce, D.

AU - Beaudette, F.

AU - Granier de Cassagnac, R.

AU - Nguyen, M.

AU - Ochando, C.

AU - Paganini, P.

AU - Salerno, R.

AU - Zabi, A.

AU - Zghiche, A.

AU - De Wit, A.

PY - 2018/7/1

Y1 - 2018/7/1

N2 - The process pp → pℓ+ℓ−p(*), with ℓ+ℓ− a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the first time at the LHC in pp collisions at s=13 TeV. One of the two scattered protons is measured in the CMS-TOTEM precision proton spectrometer (CT-PPS), which operated for the first time in 2016. The second proton either remains intact or is excited and then dissociates into a low-mass state p*, which is undetected. The measurement is based on an integrated luminosity of 9.4 fb−1 collected during standard, high-luminosity LHC operation. A total of 12 μ+μ− and 8 e+e− pairs with m(ℓ+ℓ−) > 110 GeV, and matching forward proton kinematics, are observed, with expected backgrounds of 1.49 ± 0.07 (stat) ± 0.53 (syst) and 2.36 ± 0.09 (stat) ± 0.47 (syst), respectively. This corresponds to an excess of more than five standard deviations over the expected background. The present result constitutes the first observation of proton-tagged γγ collisions at the electroweak scale. This measurement also demonstrates that CT-PPS performs according to the design specifications.[Figure not available: see fulltext.].

AB - The process pp → pℓ+ℓ−p(*), with ℓ+ℓ− a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the first time at the LHC in pp collisions at s=13 TeV. One of the two scattered protons is measured in the CMS-TOTEM precision proton spectrometer (CT-PPS), which operated for the first time in 2016. The second proton either remains intact or is excited and then dissociates into a low-mass state p*, which is undetected. The measurement is based on an integrated luminosity of 9.4 fb−1 collected during standard, high-luminosity LHC operation. A total of 12 μ+μ− and 8 e+e− pairs with m(ℓ+ℓ−) > 110 GeV, and matching forward proton kinematics, are observed, with expected backgrounds of 1.49 ± 0.07 (stat) ± 0.53 (syst) and 2.36 ± 0.09 (stat) ± 0.47 (syst), respectively. This corresponds to an excess of more than five standard deviations over the expected background. The present result constitutes the first observation of proton-tagged γγ collisions at the electroweak scale. This measurement also demonstrates that CT-PPS performs according to the design specifications.[Figure not available: see fulltext.].

KW - Forward physics

KW - Hadron-Hadron scattering (experiments)

KW - Photon production

KW - proton-proton scattering

UR - https://www.scopus.com/pages/publications/85051832717

U2 - 10.1007/JHEP07(2018)153

DO - 10.1007/JHEP07(2018)153

M3 - Article

AN - SCOPUS:85051832717

SN - 1126-6708

VL - 2018

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 7

M1 - 153

ER -

Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer

Abstract

Keywords

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