Measurement of the electron reconstruction efficiency at LHCb

The LHCb Collaboration

doi:10.1088/1748-0221/14/11/P11023

Measurement of the electron reconstruction efficiency at LHCb

The LHCb Collaboration

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

10 Citations (Scopus)

Abstract

The single electron track-reconstruction efficiency is calibrated using a sample corresponding to 1.3 fb^-1 of pp collision data recorded with the LHCb detector in 2017. This measurement exploits B⁺ J/ψ(e⁺e^-)K⁺ decays, where one of the electrons is fully reconstructed and paired with the kaon, while the other electron is reconstructed using only the information of the vertex detector. Despite this partial reconstruction, kinematic and geometric constraints allow the B meson mass to be reconstructed and the signal to be well separated from backgrounds. This in turn allows the electron reconstruction efficiency to be measured by matching the partial track segment found in the vertex detector to tracks found by LHCb's regular reconstruction algorithms. The agreement between data and simulation is evaluated, and corrections are derived for simulated electrons in bins of kinematics. These correction factors allow LHCb to measure branching fractions involving single electrons with a systematic uncertainty below 1%.

Original language	English
Article number	P11023
Number of pages	20
Journal	Journal of Instrumentation
Volume	14
Issue number	11
DOIs	https://doi.org/10.1088/1748-0221/14/11/P11023
Publication status	Published - 22 Nov 2019
Externally published	Yes

Keywords

calibration and fitting methods; Performance of High Energy Physics Detectors
cluster finding
Pattern recognition

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10.1088/1748-0221/14/11/P11023

313876727-oaFinal published version, 999 KB

Cite this

@article{7ad1f764f95d48e78a449dc2c20e084b,

title = "Measurement of the electron reconstruction efficiency at LHCb",

abstract = "The single electron track-reconstruction efficiency is calibrated using a sample corresponding to 1.3 fb-1 of pp collision data recorded with the LHCb detector in 2017. This measurement exploits B+ J/ψ(e+e-)K+ decays, where one of the electrons is fully reconstructed and paired with the kaon, while the other electron is reconstructed using only the information of the vertex detector. Despite this partial reconstruction, kinematic and geometric constraints allow the B meson mass to be reconstructed and the signal to be well separated from backgrounds. This in turn allows the electron reconstruction efficiency to be measured by matching the partial track segment found in the vertex detector to tracks found by LHCb's regular reconstruction algorithms. The agreement between data and simulation is evaluated, and corrections are derived for simulated electrons in bins of kinematics. These correction factors allow LHCb to measure branching fractions involving single electrons with a systematic uncertainty below 1%.",

keywords = "calibration and fitting methods; Performance of High Energy Physics Detectors, cluster finding, Pattern recognition",

author = "R. Aaij and {Abell{\'a}n Beteta}, C. and T. Ackernley and B. Adeva and M. Adinolfi and H. Afsharnia and Aidala, {C. A.} and S. Aiola and Z. Ajaltouni and S. Akar and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and Albero, {A. Alfonso} and G. Alkhazov and Cartelle, {P. Alvarez} and Alves, {A. A.} and S. Amato and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and F. Archilli and Romeu, {J. Arnau} and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and Back, {J. J.} and S. Baker and V. Balagura and W. Baldini and A. Baranov and Barlow, {R. J.} and S. Barsuk and W. Barter and M. Bartolini and F. Baryshnikov and G. Bassi and V. Batozskaya and B. Batsukh and A. Battig and V. Battista and A. Bay and M. Becker and F. Bedeschi and I. Bediaga and A. Beiter and Bel, {L. J.} and V. Belavin and S. Belin and N. Beliy and V. Bellee and K. Belous and I. Belyaev and G. Bencivenni and E. Ben-Haim and S. Benson and S. Beranek and A. Berezhnoy and R. Bernet and D. Berninghoff and Bernstein, {H. C.} and E. Bertholet and A. Bertolin and C. Betancourt and F. Betti and Bettler, {M. O.} and Ia Bezshyiko and S. Bhasin and J. Bhom and Bieker, {M. S.} and S. Bifani and P. Billoir and A. Birnkraut and A. Bizzeti and M. Bj{\o}rn and Blago, {M. P.} and T. Blake and F. Blanc and S. Blusk and D. Bobulska and V. Bocci and Garcia, {O. Boente} and T. Boettcher and A. Boldyrev and A. Bondar and N. Bondar and S. Borghi and M. Borisyak and M. Borsato and Borsuk, {J. T.} and M. Boubdir and Bowcock, {T. J.V.} and C. Bozzi and S. Braun and Rodriguez, {A. Brea} and M. Brodski and J. Brodzicka and Gonzalo, {A. Brossa} and D. Brundu and E. Buchanan and A. Buonaura and C. Burr and A. Bursche and Butter, {J. S.} and J. Buytaert and W. Byczynski and S. Cadeddu and H. Cai and R. Calabrese and S. Cali and R. Calladine and M. Calvi and Gomez, {M. Calvo} and A. Camboni and P. Campana and Perez, {D. H.Campora} and L. Capriotti and A. Carbone and G. Carboni and R. Cardinale and A. Cardini and P. Carniti and Akiba, {K. Carvalho} and Vidal, {A. Casais} and G. Casse and M. Cattaneo and G. Cavallero and R. Cenci and J. Cerasoli and Chapman, {M. G.} and M. Charles and Ph Charpentier and G. Chatzikonstantinidis and M. Chefdeville and V. Chekalina and C. Chen and S. Chen and A. Chernov and Chitic, {S. G.} and V. Chobanova and M. Chrzaszcz and A. Chubykin and P. Ciambrone and Cicala, {M. F.} and Vidal, {X. Cid} and G. Ciezarek and F. Cindolo and Clarke, {P. E.L.} and M. Clemencic and Cliff, {H. V.} and J. Closier and Cobbledick, {J. L.} and V. Coco and Coelho, {J. A.B.} and J. Cogan and E. Cogneras and L. Cojocariu and P. Collins and T. Colombo and A. Comerma-Montells and A. Contu and N. Cooke and G. Coombs and S. Coquereau and G. Corti and Sobral, {C. M.Costa} and B. Couturier and Cowan, {G. A.} and Craik, {D. C.} and A. Crocombe and Torres, {M. Cruz} and R. Currie and Silva, {C. L.Da} and E. Dall'Occo and J. Dalseno and C. D'Ambrosio and A. Danilina and P. D'Argent and A. Davis and Francisco, {O. De Aguiar} and Bruyn, {K. De} and Capua, {S. De} and Cian, {M. De} and Miranda, {J. M.De} and Paula, {L. De} and Serio, {M. De} and Simone, {P. De} and {De Vries}, {J. A.} and Dean, {C. T.} and W. Dean and D. Decamp and Buono, {L. Del} and B. Delaney and Dembinski, {H. P.} and M. Demmer and A. Dendek and V. Denysenko and D. Derkach and O. Deschamps and F. Desse and F. Dettori and B. Dey and Canto, {A. Di} and Nezza, {P. Di} and S. Didenko and H. Dijkstra and F. Dordei and M. Dorigo and Reis, {A. C.Dos} and {Dosil Su{\'a}rez}, A. and L. Douglas and A. Dovbnya and K. Dreimanis and Dudek, {M. W.} and L. Dufour and G. Dujany and P. Durante and Durham, {J. M.} and D. Dutta and R. Dzhelyadin and M. Dziewiecki and A. Dziurda and A. Dzyuba and S. Easo and U. Egede and V. Egorychev and S. Eidelman and S. Eisenhardt and R. Ekelhof and S. Ek-In and L. Eklund and S. Ely and A. Ene and S. Escher and S. Esen and T. Evans and A. Falabella and J. Fan and N. Farley and S. Farry and D. Fazzini and M. F{\'e}o and T. Hadavizadeh and Lane, {Jake J.} and {The LHCb Collaboration}",

year = "2019",

month = nov,

day = "22",

doi = "10.1088/1748-0221/14/11/P11023",

language = "English",

volume = "14",

journal = "Journal of Instrumentation",

issn = "1748-0221",

publisher = "IOP Publishing",

number = "11",

}

TY - JOUR

T1 - Measurement of the electron reconstruction efficiency at LHCb

AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Afsharnia, H.

AU - Aidala, C. A.

AU - Aiola, S.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Albero, A. Alfonso

AU - Alkhazov, G.

AU - Cartelle, P. Alvarez

AU - Alves, A. A.

AU - Amato, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Archilli, F.

AU - Romeu, J. Arnau

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Baranov, A.

AU - Barlow, R. J.

AU - Barsuk, S.

AU - Barter, W.

AU - Bartolini, M.

AU - Baryshnikov, F.

AU - Bassi, G.

AU - Batozskaya, V.

AU - Batsukh, B.

AU - Battig, A.

AU - Battista, V.

AU - Bay, A.

AU - Becker, M.

AU - Bedeschi, F.

AU - Bediaga, I.

AU - Beiter, A.

AU - Bel, L. J.

AU - Belavin, V.

AU - Belin, S.

AU - Beliy, N.

AU - Bellee, V.

AU - Belous, K.

AU - Belyaev, I.

AU - Bencivenni, G.

AU - Ben-Haim, E.

AU - Benson, S.

AU - Beranek, S.

AU - Berezhnoy, A.

AU - Bernet, R.

AU - Berninghoff, D.

AU - Bernstein, H. C.

AU - Bertholet, E.

AU - Bertolin, A.

AU - Betancourt, C.

AU - Betti, F.

AU - Bettler, M. O.

AU - Bezshyiko, Ia

AU - Bhasin, S.

AU - Bhom, J.

AU - Bieker, M. S.

AU - Bifani, S.

AU - Billoir, P.

AU - Birnkraut, A.

AU - Bizzeti, A.

AU - Bjørn, M.

AU - Blago, M. P.

AU - Blake, T.

AU - Blanc, F.

AU - Blusk, S.

AU - Bobulska, D.

AU - Bocci, V.

AU - Garcia, O. Boente

AU - Boettcher, T.

AU - Boldyrev, A.

AU - Bondar, A.

AU - Bondar, N.

AU - Borghi, S.

AU - Borisyak, M.

AU - Borsato, M.

AU - Borsuk, J. T.

AU - Boubdir, M.

AU - Bowcock, T. J.V.

AU - Bozzi, C.

AU - Braun, S.

AU - Rodriguez, A. Brea

AU - Brodski, M.

AU - Brodzicka, J.

AU - Gonzalo, A. Brossa

AU - Brundu, D.

AU - Buchanan, E.

AU - Buonaura, A.

AU - Burr, C.

AU - Bursche, A.

AU - Butter, J. S.

AU - Buytaert, J.

AU - Byczynski, W.

AU - Cadeddu, S.

AU - Cai, H.

AU - Calabrese, R.

AU - Cali, S.

AU - Calladine, R.

AU - Calvi, M.

AU - Gomez, M. Calvo

AU - Camboni, A.

AU - Campana, P.

AU - Perez, D. H.Campora

AU - Capriotti, L.

AU - Carbone, A.

AU - Carboni, G.

AU - Cardinale, R.

AU - Cardini, A.

AU - Carniti, P.

AU - Akiba, K. Carvalho

AU - Vidal, A. Casais

AU - Casse, G.

AU - Cattaneo, M.

AU - Cavallero, G.

AU - Cenci, R.

AU - Cerasoli, J.

AU - Chapman, M. G.

AU - Charles, M.

AU - Charpentier, Ph

AU - Chatzikonstantinidis, G.

AU - Chefdeville, M.

AU - Chekalina, V.

AU - Chen, C.

AU - Chen, S.

AU - Chernov, A.

AU - Chitic, S. G.

AU - Chobanova, V.

AU - Chrzaszcz, M.

AU - Chubykin, A.

AU - Ciambrone, P.

AU - Cicala, M. F.

AU - Vidal, X. Cid

AU - Ciezarek, G.

AU - Cindolo, F.

AU - Clarke, P. E.L.

AU - Clemencic, M.

AU - Cliff, H. V.

AU - Closier, J.

AU - Cobbledick, J. L.

AU - Coco, V.

AU - Coelho, J. A.B.

AU - Cogan, J.

AU - Cogneras, E.

AU - Cojocariu, L.

AU - Collins, P.

AU - Colombo, T.

AU - Comerma-Montells, A.

AU - Contu, A.

AU - Cooke, N.

AU - Coombs, G.

AU - Coquereau, S.

AU - Corti, G.

AU - Sobral, C. M.Costa

AU - Couturier, B.

AU - Cowan, G. A.

AU - Craik, D. C.

AU - Crocombe, A.

AU - Torres, M. Cruz

AU - Currie, R.

AU - Silva, C. L.Da

AU - Dall'Occo, E.

AU - Dalseno, J.

AU - D'Ambrosio, C.

AU - Danilina, A.

AU - D'Argent, P.

AU - Davis, A.

AU - Francisco, O. De Aguiar

AU - Bruyn, K. De

AU - Capua, S. De

AU - Cian, M. De

AU - Miranda, J. M.De

AU - Paula, L. De

AU - Serio, M. De

AU - Simone, P. De

AU - De Vries, J. A.

AU - Dean, C. T.

AU - Dean, W.

AU - Decamp, D.

AU - Buono, L. Del

AU - Delaney, B.

AU - Dembinski, H. P.

AU - Demmer, M.

AU - Dendek, A.

AU - Denysenko, V.

AU - Derkach, D.

AU - Deschamps, O.

AU - Desse, F.

AU - Dettori, F.

AU - Dey, B.

AU - Canto, A. Di

AU - Nezza, P. Di

AU - Didenko, S.

AU - Dijkstra, H.

AU - Dordei, F.

AU - Dorigo, M.

AU - Reis, A. C.Dos

AU - Dosil Suárez, A.

AU - Douglas, L.

AU - Dovbnya, A.

AU - Dreimanis, K.

AU - Dudek, M. W.

AU - Dufour, L.

AU - Dujany, G.

AU - Durante, P.

AU - Durham, J. M.

AU - Dutta, D.

AU - Dzhelyadin, R.

AU - Dziewiecki, M.

AU - Dziurda, A.

AU - Dzyuba, A.

AU - Easo, S.

AU - Egede, U.

AU - Egorychev, V.

AU - Eidelman, S.

AU - Eisenhardt, S.

AU - Ekelhof, R.

AU - Ek-In, S.

AU - Eklund, L.

AU - Ely, S.

AU - Ene, A.

AU - Escher, S.

AU - Esen, S.

AU - Evans, T.

AU - Falabella, A.

AU - Fan, J.

AU - Farley, N.

AU - Farry, S.

AU - Fazzini, D.

AU - Féo, M.

AU - Hadavizadeh, T.

AU - Lane, Jake J.

AU - The LHCb Collaboration

PY - 2019/11/22

Y1 - 2019/11/22

N2 - The single electron track-reconstruction efficiency is calibrated using a sample corresponding to 1.3 fb-1 of pp collision data recorded with the LHCb detector in 2017. This measurement exploits B+ J/ψ(e+e-)K+ decays, where one of the electrons is fully reconstructed and paired with the kaon, while the other electron is reconstructed using only the information of the vertex detector. Despite this partial reconstruction, kinematic and geometric constraints allow the B meson mass to be reconstructed and the signal to be well separated from backgrounds. This in turn allows the electron reconstruction efficiency to be measured by matching the partial track segment found in the vertex detector to tracks found by LHCb's regular reconstruction algorithms. The agreement between data and simulation is evaluated, and corrections are derived for simulated electrons in bins of kinematics. These correction factors allow LHCb to measure branching fractions involving single electrons with a systematic uncertainty below 1%.

AB - The single electron track-reconstruction efficiency is calibrated using a sample corresponding to 1.3 fb-1 of pp collision data recorded with the LHCb detector in 2017. This measurement exploits B+ J/ψ(e+e-)K+ decays, where one of the electrons is fully reconstructed and paired with the kaon, while the other electron is reconstructed using only the information of the vertex detector. Despite this partial reconstruction, kinematic and geometric constraints allow the B meson mass to be reconstructed and the signal to be well separated from backgrounds. This in turn allows the electron reconstruction efficiency to be measured by matching the partial track segment found in the vertex detector to tracks found by LHCb's regular reconstruction algorithms. The agreement between data and simulation is evaluated, and corrections are derived for simulated electrons in bins of kinematics. These correction factors allow LHCb to measure branching fractions involving single electrons with a systematic uncertainty below 1%.

KW - calibration and fitting methods; Performance of High Energy Physics Detectors

KW - cluster finding

KW - Pattern recognition

UR - http://www.scopus.com/inward/record.url?scp=85081981429&partnerID=8YFLogxK

U2 - 10.1088/1748-0221/14/11/P11023

DO - 10.1088/1748-0221/14/11/P11023

M3 - Article

AN - SCOPUS:85081981429

SN - 1748-0221

VL - 14

JO - Journal of Instrumentation

JF - Journal of Instrumentation

IS - 11

M1 - P11023

ER -

Measurement of the electron reconstruction efficiency at LHCb

Abstract

Keywords

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