Search for the production of a long-lived neutral particle decaying within the ATLAS hadronic calorimeter in association with a Z boson from pp collisions at √s = 13 TeV

ATLAS Collaboration

doi:10.1103/PhysRevLett.122.151801

Search for the production of a long-lived neutral particle decaying within the ATLAS hadronic calorimeter in association with a Z boson from pp collisions at √s = 13 TeV

ATLAS Collaboration

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Abstract

This Letter presents a search for the production of a long-lived neutral particle (𝑍_𝑑) decaying within the ATLAS hadronic calorimeter, in association with a standard model (SM) 𝑍 boson produced via an intermediate scalar boson, where 𝑍 → ℓ⁺⁢ℓ⁻ (ℓ = 𝑒, 𝜇). The data used were collected by the ATLAS detector during 2015 and 2016 𝑝⁢𝑝 collisions with a center-of-mass energy of √𝑠 = 13 TeV at the Large Hadron Collider and correspond to an integrated luminosity of 36.1 ± 0.8 fb⁻¹. No significant excess of events is observed above the expected background. Limits on the production cross section of the scalar boson times its decay branching fraction into the long-lived neutral particle are derived as a function of the mass of the intermediate scalar boson, the mass of the long-lived neutral particle, and its 𝑐⁢𝜏 from a few centimeters to one hundred meters. In the case that the intermediate scalar boson is the SM Higgs boson, its decay branching fraction to a long-lived neutral particle with a 𝑐⁢𝜏 approximately between 0.1 and 7 m is excluded with a 95% confidence level up to 10% for 𝑚_𝑍𝑑 between 5 and 15 GeV.

Original language	English
Article number	151801
Pages (from-to)	151801-1-151801-19
Number of pages	19
Journal	Physical Review Letters
Volume	122
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.122.151801
Publication status	Published - 19 Apr 2019
Externally published	Yes

Bibliographical note

Copyright the Author(s) 2019. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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10.1103/PhysRevLett.122.151801Licence: CC BY

Publisher version (open access)Final published version, 409 KBLicence: CC BY

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@article{bb70313bd9164457b59a55e7e19c4e91,

title = "Search for the production of a long-lived neutral particle decaying within the ATLAS hadronic calorimeter in association with a Z boson from pp collisions at √s = 13 TeV",

abstract = "This Letter presents a search for the production of a long-lived neutral particle (𝑍𝑑) decaying within the ATLAS hadronic calorimeter, in association with a standard model (SM) 𝑍 boson produced via an intermediate scalar boson, where 𝑍 → ℓ+⁢ℓ− (ℓ = 𝑒, 𝜇). The data used were collected by the ATLAS detector during 2015 and 2016 𝑝⁢𝑝 collisions with a center-of-mass energy of √𝑠 = 13 TeV at the Large Hadron Collider and correspond to an integrated luminosity of 36.1 ± 0.8 fb−1. No significant excess of events is observed above the expected background. Limits on the production cross section of the scalar boson times its decay branching fraction into the long-lived neutral particle are derived as a function of the mass of the intermediate scalar boson, the mass of the long-lived neutral particle, and its 𝑐⁢𝜏 from a few centimeters to one hundred meters. In the case that the intermediate scalar boson is the SM Higgs boson, its decay branching fraction to a long-lived neutral particle with a 𝑐⁢𝜏 approximately between 0.1 and 7 m is excluded with a 95% confidence level up to 10% for 𝑚𝑍𝑑 between 5 and 15 GeV.",

author = "{ATLAS Collaboration} and M. Aaboud and G. Aad and B. Abbott and O. Abdinov and B. Abeloos and Abhayasinghe, {D. K.} and Abidi, {S. H.} and Abouzeid, {O. S.} and Abraham, {N. L.} and H. Abramowicz and H. Abreu and Y. Abulaiti and Acharya, {B. S.} and S. Adachi and L. Adam and L. Adamczyk and J. Adelman and M. Adersberger and A. Adiguzel and T. Adye and Affolder, {A. A.} and Y. Afik and C. Agheorghiesei and Aguilar-Saavedra, {J. A.} and F. Ahmadov and G. Aielli and S. Akatsuka and {\AA}kesson, {T. P.A.} and E. Akilli and Akimov, {A. V.} and Alberghi, {G. L.} and J. Albert and P. Albicocco and {Alconada Verzini}, {M. J.} and S. Alderweireldt and M. Aleksa and Aleksandrov, {I. N.} and C. Alexa and D. Alexandre and T. Alexopoulos and M. Alhroob and B. Ali and G. Alimonti and J. Alison and Alkire, {S. P.} and C. Allaire and Allbrooke, {B. M.M.} and Allen, {B. W.} and Allport, {P. P.} and A. Aloisio and A. Alonso and F. Alonso and C. Alpigiani and Alshehri, {A. A.} and Alstaty, {M. I.} and {Alvarez Gonzalez}, B. and {{\'A}lvarez Piqueras}, D. and Alviggi, {M. G.} and Amadio, {B. T.} and {Amaral Coutinho}, Y. and A. Ambler and L. Ambroz and C. Amelung and D. Amidei and {Amor Dos Santos}, {S. P.} and S. Amoroso and Amrouche, {C. S.} and F. An and C. Anastopoulos and Ancu, {L. S.} and N. Andari and T. Andeen and Anders, {C. F.} and Anders, {J. K.} and Anderson, {K. J.} and A. Andreazza and V. Andrei and Anelli, {C. R.} and S. Angelidakis and I. Angelozzi and A. Angerami and Anisenkov, {A. V.} and A. Annovi and C. Antel and Anthony, {M. T.} and M. Antonelli and Antrim, {D. J.A.} and F. Anulli and M. Aoki and {Aparisi Pozo}, {J. A.} and {Aperio Bella}, L. and G. Arabidze and Araque, {J. P.} and {Araujo Ferraz}, V. and {Araujo Pereira}, R. and Arce, {A. T.H.} and Ardell, {R. E.} and Arduh, {F. A.} and Arguin, {J. F.} and S. Argyropoulos and Arling, {J. H.} and Armbruster, {A. J.} and Armitage, {L. J.} and A. Armstrong and O. Arnaez and H. Arnold and M. Arratia and O. Arslan and A. Artamonov and G. Artoni and S. Artz and S. Asai and N. Asbah and Asimakopoulou, {E. M.} and L. Asquith and K. Assamagan and R. Astalos and Atkin, {R. J.} and M. Atkinson and Atlay, {N. B.} and K. Augsten and G. Avolio and R. Avramidou and Ayoub, {M. K.} and Azoulay, {A. M.} and G. Azuelos and Baas, {A. E.} and Baca, {M. J.} and H. Bachacou and K. Bachas and M. Backes and P. Bagnaia and M. Bahmani and H. Bahrasemani and Bailey, {A. J.} and Bailey, {V. R.} and Baines, {J. T.} and M. Bajic and C. Bakalis and Baker, {O. K.} and Bakker, {P. J.} and {Bakshi Gupta}, D. and S. Balaji and Baldin, {E. M.} and P. Balek and F. Balli and Balunas, {W. K.} and J. Balz and E. Banas and A. Bandyopadhyay and S. Banerjee and Bannoura, {A. A.E.} and L. Barak and Barbe, {W. M.} and Barberio, {E. L.} and D. Barberis and M. Barbero and T. Barillari and Barisits, {M. S.} and J. Barkeloo and T. Barklow and R. Barnea and Barnes, {S. L.} and Barnett, {B. M.} and Barnett, {R. M.} and Z. Barnovska-Blenessy and A. Baroncelli and G. Barone and Barr, {A. J.} and {Barranco Navarro}, L. and F. Barreiro and {Barreiro Guimar{\~a}es Da Costa}, J. and R. Bartoldus and Barton, {A. E.} and P. Bartos and A. Basalaev and A. Bassalat and Bates, {R. L.} and Batista, {S. J.} and S. Batlamous and Batley, {J. R.} and M. Battaglia and M. Bauce and F. Bauer and Bauer, {K. T.} and Bawa, {H. S.} and Beacham, {J. B.} and T. Beau and Beauchemin, {P. H.} and P. Bechtle and Beck, {H. C.} and Beck, {H. P.} and K. Becker and M. Becker and C. Becot and Beddall, {A. J.} and Beddall, {A. J.} and Bednyakov, {V. A.} and M. Bedognetti and Bee, {C. P.} and Beermann, {T. A.} and M. Begalli and M. Begel and A. Behera and Behr, {J. K.} and F. Beisiegel and Bell, {A. S.} and G. Bella and L. Bellagamba and A. Bellerive and M. Bellomo and P. Bellos and K. Belotskiy and Belyaev, {N. L.} and O. Benary and D. Benchekroun and M. Bender and N. Benekos and Y. Benhammou and {Benhar Noccioli}, E. and J. Benitez and Benjamin, {D. P.} and M. Benoit and Bensinger, {J. R.} and S. Bentvelsen and L. Beresford and M. Beretta and D. Berge and {Bergeaas Kuutmann}, E. and N. Berger and B. Bergmann and Bergsten, {L. J.} and J. Beringer and S. Berlendis and Bernard, {N. R.} and G. Bernardi and C. Bernius and Bernlochner, {F. U.} and T. Berry and P. Berta and C. Bertella and G. Bertoli and Bertram, {I. A.} and Besjes, {G. J.} and {Bessidskaia Bylund}, O. and M. Bessner and N. Besson and A. Bethani and S. Bethke and S. Shojaii",

note = "Copyright the Author(s) 2019. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

year = "2019",

month = apr,

day = "19",

doi = "10.1103/PhysRevLett.122.151801",

language = "English",

volume = "122",

pages = "151801--1--151801--19",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "15",

}

TY - JOUR

T1 - Search for the production of a long-lived neutral particle decaying within the ATLAS hadronic calorimeter in association with a Z boson from pp collisions at √s = 13 TeV

AU - ATLAS Collaboration

AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Abdinov, O.

AU - Abeloos, B.

AU - Abhayasinghe, D. K.

AU - Abidi, S. H.

AU - Abouzeid, O. S.

AU - Abraham, N. L.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Adachi, S.

AU - Adam, L.

AU - Adamczyk, L.

AU - Adelman, J.

AU - Adersberger, M.

AU - Adiguzel, A.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agheorghiesei, C.

AU - Aguilar-Saavedra, J. A.

AU - Ahmadov, F.

AU - Aielli, G.

AU - Akatsuka, S.

AU - Åkesson, T. P.A.

AU - Akilli, E.

AU - Akimov, A. V.

AU - Alberghi, G. L.

AU - Albert, J.

AU - Albicocco, P.

AU - Alconada Verzini, M. J.

AU - Alderweireldt, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alexa, C.

AU - Alexandre, D.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Ali, B.

AU - Alimonti, G.

AU - Alison, J.

AU - Alkire, S. P.

AU - Allaire, C.

AU - Allbrooke, B. M.M.

AU - Allen, B. W.

AU - Allport, P. P.

AU - Aloisio, A.

AU - Alonso, A.

AU - Alonso, F.

AU - Alpigiani, C.

AU - Alshehri, A. A.

AU - Alstaty, M. I.

AU - Alvarez Gonzalez, B.

AU - Álvarez Piqueras, D.

AU - Alviggi, M. G.

AU - Amadio, B. T.

AU - Amaral Coutinho, Y.

AU - Ambler, A.

AU - Ambroz, L.

AU - Amelung, C.

AU - Amidei, D.

AU - Amor Dos Santos, S. P.

AU - Amoroso, S.

AU - Amrouche, C. S.

AU - An, F.

AU - Anastopoulos, C.

AU - Ancu, L. S.

AU - Andari, N.

AU - Andeen, T.

AU - Anders, C. F.

AU - Anders, J. K.

AU - Anderson, K. J.

AU - Andreazza, A.

AU - Andrei, V.

AU - Anelli, C. R.

AU - Angelidakis, S.

AU - Angelozzi, I.

AU - Angerami, A.

AU - Anisenkov, A. V.

AU - Annovi, A.

AU - Antel, C.

AU - Anthony, M. T.

AU - Antonelli, M.

AU - Antrim, D. J.A.

AU - Anulli, F.

AU - Aoki, M.

AU - Aparisi Pozo, J. A.

AU - Aperio Bella, L.

AU - Arabidze, G.

AU - Araque, J. P.

AU - Araujo Ferraz, V.

AU - Araujo Pereira, R.

AU - Arce, A. T.H.

AU - Ardell, R. E.

AU - Arduh, F. A.

AU - Arguin, J. F.

AU - Argyropoulos, S.

AU - Arling, J. H.

AU - Armbruster, A. J.

AU - Armitage, L. J.

AU - Armstrong, A.

AU - Arnaez, O.

AU - Arnold, H.

AU - Arratia, M.

AU - Arslan, O.

AU - Artamonov, A.

AU - Artoni, G.

AU - Artz, S.

AU - Asai, S.

AU - Asbah, N.

AU - Asimakopoulou, E. M.

AU - Asquith, L.

AU - Assamagan, K.

AU - Astalos, R.

AU - Atkin, R. J.

AU - Atkinson, M.

AU - Atlay, N. B.

AU - Augsten, K.

AU - Avolio, G.

AU - Avramidou, R.

AU - Ayoub, M. K.

AU - Azoulay, A. M.

AU - Azuelos, G.

AU - Baas, A. E.

AU - Baca, M. J.

AU - Bachacou, H.

AU - Bachas, K.

AU - Backes, M.

AU - Bagnaia, P.

AU - Bahmani, M.

AU - Bahrasemani, H.

AU - Bailey, A. J.

AU - Bailey, V. R.

AU - Baines, J. T.

AU - Bajic, M.

AU - Bakalis, C.

AU - Baker, O. K.

AU - Bakker, P. J.

AU - Bakshi Gupta, D.

AU - Balaji, S.

AU - Baldin, E. M.

AU - Balek, P.

AU - Balli, F.

AU - Balunas, W. K.

AU - Balz, J.

AU - Banas, E.

AU - Bandyopadhyay, A.

AU - Banerjee, S.

AU - Bannoura, A. A.E.

AU - Barak, L.

AU - Barbe, W. M.

AU - Barberio, E. L.

AU - Barberis, D.

AU - Barbero, M.

AU - Barillari, T.

AU - Barisits, M. S.

AU - Barkeloo, J.

AU - Barklow, T.

AU - Barnea, R.

AU - Barnes, S. L.

AU - Barnett, B. M.

AU - Barnett, R. M.

AU - Barnovska-Blenessy, Z.

AU - Baroncelli, A.

AU - Barone, G.

AU - Barr, A. J.

AU - Barranco Navarro, L.

AU - Barreiro, F.

AU - Barreiro Guimarães Da Costa, J.

AU - Bartoldus, R.

AU - Barton, A. E.

AU - Bartos, P.

AU - Basalaev, A.

AU - Bassalat, A.

AU - Bates, R. L.

AU - Batista, S. J.

AU - Batlamous, S.

AU - Batley, J. R.

AU - Battaglia, M.

AU - Bauce, M.

AU - Bauer, F.

AU - Bauer, K. T.

AU - Bawa, H. S.

AU - Beacham, J. B.

AU - Beau, T.

AU - Beauchemin, P. H.

AU - Bechtle, P.

AU - Beck, H. C.

AU - Beck, H. P.

AU - Becker, K.

AU - Becker, M.

AU - Becot, C.

AU - Beddall, A. J.

AU - Bednyakov, V. A.

AU - Bedognetti, M.

AU - Bee, C. P.

AU - Beermann, T. A.

AU - Begalli, M.

AU - Begel, M.

AU - Behera, A.

AU - Behr, J. K.

AU - Beisiegel, F.

AU - Bell, A. S.

AU - Bella, G.

AU - Bellagamba, L.

AU - Bellerive, A.

AU - Bellomo, M.

AU - Bellos, P.

AU - Belotskiy, K.

AU - Belyaev, N. L.

AU - Benary, O.

AU - Benchekroun, D.

AU - Bender, M.

AU - Benekos, N.

AU - Benhammou, Y.

AU - Benhar Noccioli, E.

AU - Benitez, J.

AU - Benjamin, D. P.

AU - Benoit, M.

AU - Bensinger, J. R.

AU - Bentvelsen, S.

AU - Beresford, L.

AU - Beretta, M.

AU - Berge, D.

AU - Bergeaas Kuutmann, E.

AU - Berger, N.

AU - Bergmann, B.

AU - Bergsten, L. J.

AU - Beringer, J.

AU - Berlendis, S.

AU - Bernard, N. R.

AU - Bernardi, G.

AU - Bernius, C.

AU - Bernlochner, F. U.

AU - Berry, T.

AU - Berta, P.

AU - Bertella, C.

AU - Bertoli, G.

AU - Bertram, I. A.

AU - Besjes, G. J.

AU - Bessidskaia Bylund, O.

AU - Bessner, M.

AU - Besson, N.

AU - Bethani, A.

AU - Bethke, S.

AU - Shojaii, S.

N1 - Copyright the Author(s) 2019. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2019/4/19

Y1 - 2019/4/19

N2 - This Letter presents a search for the production of a long-lived neutral particle (𝑍𝑑) decaying within the ATLAS hadronic calorimeter, in association with a standard model (SM) 𝑍 boson produced via an intermediate scalar boson, where 𝑍 → ℓ+⁢ℓ− (ℓ = 𝑒, 𝜇). The data used were collected by the ATLAS detector during 2015 and 2016 𝑝⁢𝑝 collisions with a center-of-mass energy of √𝑠 = 13 TeV at the Large Hadron Collider and correspond to an integrated luminosity of 36.1 ± 0.8 fb−1. No significant excess of events is observed above the expected background. Limits on the production cross section of the scalar boson times its decay branching fraction into the long-lived neutral particle are derived as a function of the mass of the intermediate scalar boson, the mass of the long-lived neutral particle, and its 𝑐⁢𝜏 from a few centimeters to one hundred meters. In the case that the intermediate scalar boson is the SM Higgs boson, its decay branching fraction to a long-lived neutral particle with a 𝑐⁢𝜏 approximately between 0.1 and 7 m is excluded with a 95% confidence level up to 10% for 𝑚𝑍𝑑 between 5 and 15 GeV.

AB - This Letter presents a search for the production of a long-lived neutral particle (𝑍𝑑) decaying within the ATLAS hadronic calorimeter, in association with a standard model (SM) 𝑍 boson produced via an intermediate scalar boson, where 𝑍 → ℓ+⁢ℓ− (ℓ = 𝑒, 𝜇). The data used were collected by the ATLAS detector during 2015 and 2016 𝑝⁢𝑝 collisions with a center-of-mass energy of √𝑠 = 13 TeV at the Large Hadron Collider and correspond to an integrated luminosity of 36.1 ± 0.8 fb−1. No significant excess of events is observed above the expected background. Limits on the production cross section of the scalar boson times its decay branching fraction into the long-lived neutral particle are derived as a function of the mass of the intermediate scalar boson, the mass of the long-lived neutral particle, and its 𝑐⁢𝜏 from a few centimeters to one hundred meters. In the case that the intermediate scalar boson is the SM Higgs boson, its decay branching fraction to a long-lived neutral particle with a 𝑐⁢𝜏 approximately between 0.1 and 7 m is excluded with a 95% confidence level up to 10% for 𝑚𝑍𝑑 between 5 and 15 GeV.

UR - http://www.scopus.com/inward/record.url?scp=85065591238&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.122.151801

DO - 10.1103/PhysRevLett.122.151801

M3 - Article

C2 - 31050493

AN - SCOPUS:85065591238

SN - 0031-9007

VL - 122

SP - 151801-1-151801-19

JO - Physical Review Letters

JF - Physical Review Letters

IS - 15

M1 - 151801

ER -

Search for the production of a long-lived neutral particle decaying within the ATLAS hadronic calorimeter in association with a Z boson from pp collisions at √s = 13 TeV

Abstract

Bibliographical note

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