Helium identification with LHCb
Creators: name: LHCb Collaboration
name: Aaij, R.
name: Abdelmotteleb, A. S. W.
name: Beteta, C. Abellan
name: Abudinén, F.
name: Ackernley, T.
name: Adeva, B.
name: Adinolfi, M.
name: Adlarson, P.
name: Agapopoulou, C.
name: Aidala, C. A.
name: Ajaltouni, Z.
name: Akar, S.
name: Akiba, K.
name: Albicocco, P.
name: Albrecht, J.
name: Alessio, F.
name: Alexander, M.
name: Albero, A. Alfonso
name: Aliouche, Z.
name: Cartelle, P. Alvarez
name: Amalric, R.
name: Amato, S.
name: Amey, J. L.
name: Amhis, Y.
name: An, L.
name: Anderlini, L.
name: Andersson, M.
name: Andreianov, A.
name: Andreola, P.
name: Andreotti, M.
name: Andreou, D.
name: Anelli, A. A.
name: Ao, D.
name: Archilli, F.
name: Argenton, M.
name: Cuendis, S. Arguedas
name: Artamonov, A.
name: Artuso, M.
name: Aslanides, E.
name: Atzeni, M.
name: Audurier, B.
name: Bacher, D.
name: Perea, I. Bachiller
name: Bachmann, S.
name: Bachmayer, M.
name: Back, J. J.
name: Bailly-reyre, A.
name: Rodriguez, P. Baladron
name: Balagura, V.
name: Baldini, W.
name: Leite, J. Baptista de Souza
name: Barbetti, M.
name: Barbosa, I. R.
name: Barlow, R. J.
name: Barsuk, S.
name: Barter, W.
name: Bartolini, M.
name: Baryshnikov, F.
name: Basels, J. M.
name: Bassi, G.
name: Batsukh, B.
name: Battig, A.
name: Bay, A.
name: Beck, A.
name: Becker, M.
name: Bedeschi, F.
name: Bediaga, I. B.
name: Beiter, A.
name: Belin, S.
name: Bellee, V.
name: Belous, K.
name: Belov, I.
name: Belyaev, I.
name: Benane, G.
name: Bencivenni, G.
name: Ben-Haim, E.
name: Berezhnoy, A.
name: Bernet, R.
name: Andres, S. Bernet
name: Bernstein, H. C.
name: Bertella, C.
name: Bertolin, A.
name: Betancourt, C.
name: Betti, F.
name: Bex, J.
name: Bezshyiko, Ia.
name: Bhom, J.
name: Bieker, M. S.
name: Biesuz, N. V.
name: Billoir, P.
name: Biolchini, A.
name: Birch, M.
name: Bishop, F. C. R.
name: Bitadze, A.
name: Bizzeti, A.
name: Blago, M. P.
name: Blake, T.
name: Blanc, F.
name: Blank, J. E.
name: Blusk, S.
name: Bobulska, D.
name: Bocharnikov, V.
name: Boelhauve, J. A.
name: Garcia, O. Boente
name: Boettcher, T.
name: Bohare, A.
name: Boldyrev, A.
name: Bolognani, C. S.
name: Bolzonella, R.
name: Bondar, N.
name: Borgato, F.
name: Borghi, S.
name: Borsato, M.
name: Borsuk, J. T.
name: Bouchiba, S. A.
name: Bowcock, T. J. V.
name: Boyer, A.
name: Bozzi, C.
name: Bradley, M. J.
name: Braun, S.
name: Rodriguez, A. Brea
name: Breer, N.
name: Brodzicka, J.
name: Gonzalo, A. Brossa
name: Brown, J.
name: Brundu, D.
name: Buonaura, A.
name: Buonincontri, L.
name: Burke, A. T.
name: Burr, C.
name: Bursche, A.
name: Butkevich, A.
name: Butter, J. S.
name: Buytaert, J.
name: Byczynski, W.
name: Cadeddu, S.
name: Cai, H.
name: Calabrese, R.
name: Calefice, L.
name: Cali, S.
name: Calvi, M.
name: Gomez, M. Calvo
name: Bouzas, J. Cambon
name: Campana, P.
name: Perez, D. H. Campora
name: Quezada, A. F. Campoverde
name: Capelli, S.
name: Capriotti, L.
name: Caravaca-Mora, R.
name: Carbone, A.
name: Salgado, L. Carcedo
name: Cardinale, R.
name: Cardini, A.
name: Carniti, P.
name: Carus, L.
name: Vidal, A. Casais
name: Caspary, R.
name: Casse, G.
name: Godinez, J. Castro
name: Cattaneo, M.
name: Cavallero, G.
name: Cavallini, V.
name: Celani, S.
name: Cerasoli, J.
name: Cervenkov, D.
name: Cesare, S.
name: Chadwick, A. J.
name: Chahrour, I.
name: Charles, M.
name: Charpentier, Ph.
name: Barajas, C. A. Chavez
name: Chefdeville, M.
name: Chen, C.
name: Chen, S.
name: Chernov, A.
name: Chernyshenko, S.
name: Chobanova, V.
name: Cholak, S.
name: Chrzaszcz, M.
name: Chubykin, A.
name: Chulikov, V.
name: Ciambrone, P.
name: Cicala, M. F.
name: Vidal, X. Cid
name: Ciezarek, G.
name: Cifra, P.
name: Clarke, P. E. L.
name: Clemencic, M.
name: Cliff, H. V.
name: Closier, J.
name: Cobbledick, J. L.
name: Toapaxi, C. Cocha
name: Coco, V.
name: Cogan, J.
name: Cogneras, E.
name: Cojocariu, L.
name: Collins, P.
name: Colombo, T.
name: Comerma-Montells, A.
name: Congedo, L.
name: Contu, A.
name: Cooke, N.
name: Corredoira, I.
name: Correia, A.
name: Corti, G.
name: Meldrum, J. J. Cottee
name: Couturier, B.
name: Craik, D. C.
name: Torres, M. Cruz
name: Currie, R.
name: Da Silva, C. L.
name: Dadabaev, S.
name: Dai, L.
name: Dai, X.
name: Dall'Occo, E.
name: Dalseno, J.
name: D'Ambrosio, C.
name: Daniel, J.
name: Danilina, A.
name: d'Argent, P.
name: Davidson, A.
name: Davies, J. E.
name: Davis, A.
name: Francisco, O. De Aguiar
name: De Angelis, C.
name: de Boer, J.
name: De Bruyn, K.
name: De Capua, S.
name: De Cian, M.
name: Da Graca, U. De Freitas Carneiro
name: De Lucia, E.
name: De Miranda, J. M.
name: De Paula, L.
name: De Serio, M.
name: De Simone, D.
name: De Simone, P.
name: De Vellis, F.
name: de Vries, J. A.
name: Debernardis, F.
name: Decamp, D.
name: Dedu, V.
name: Del Buono, L.
name: Delaney, B.
name: Dembinski, H. -P.
name: Deng, J.
name: Denysenko, V.
name: Deschamps, O.
name: Dettori, F.
name: Dey, B.
name: Di Nezza, P.
name: Diachkov, I.
name: Didenko, S.
name: Ding, S.
name: Dobishuk, V.
name: Docheva, A. D.
name: Dolmatov, A.
name: Dong, C.
name: Donohoe, A. M.
name: Dordei, F.
name: Reis, A. C. dos
name: Douglas, L.
name: Downes, A. G.
name: Duan, W.
name: Duda, P.
name: Dudek, M. W.
name: Dufour, L.
name: Duk, V.
name: Durante, P.
name: Duras, M. M.
name: Durham, J. M.
name: Dziurda, A.
name: Dzyuba, A.
name: Easo, S.
name: Eckstein, E.
name: Egede, U.
name: Egorychev, A.
name: Egorychev, V.
name: Orro, C. Eirea
name: Eisenhardt, S.
name: Ejopu, E.
name: Ek-In, S.
name: Eklund, L.
name: Elashri, M.
name: Ellbracht, J.
name: Ely, S.
name: Ene, A.
name: Epple, E.
name: Escher, S.
name: Eschle, J.
name: Esen, S.
name: Evans, T.
name: Fabiano, F.
name: Falcao, L. N.
name: Fan, Y.
name: Fang, B.
name: Fantini, L.
name: Faria, M.
name: Farmer, K.
name: Fazzini, D.
name: Felkowski, L.
name: Feng, M.
name: Feo, M.
name: Gomez, M. Fernandez
name: Fernez, A. D.
name: Ferrari, F.
name: Rodrigues, F. Ferreira
name: Sole, S. Ferreres
name: Ferrillo, M.
name: Ferro-Luzzi, M.
name: Filippov, S.
name: Fini, R. A.
name: Fiorini, M.
name: Firlej, M.
name: Fischer, K. M.
name: Fitzgerald, D. S.
name: Fitzpatrick, C.
name: Fiutowski, T.
name: Fleuret, F.
name: Fontana, M.
name: Fontanelli, F.
name: Foreman, L. F.
name: Forty, R.
name: Foulds-Holt, D.
name: Sevilla, M. Franco
name: Frank, M.
name: Franzoso, E.
name: Frau, G.
name: Frei, C.
name: Friday, D. A.
name: Frontini, L.
name: Fu, J.
name: Fuehring, Q.
name: Fujii, Y.
name: Fulghesu, T.
name: Gabriel, E.
name: Galati, G.
name: Galati, M. D.
name: Torreira, A. Gallas
name: Galli, D.
name: Gambetta, S.
name: Gandelman, M.
name: Gandini, P.
name: Gao, H.
name: Gao, R.
name: Gao, Y.
name: Gao, Y.
name: Gao, Y.
name: Garau, M.
name: Martin, L. M. Garcia
name: Moreno, P. Garcia
name: Pardiñas, J. García
name: Plana, B. Garcia
name: Garg, K. G.
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name: Geertsema, R. E.
name: Gerken, L. L.
name: Gersabeck, E.
name: Gersabeck, M.
name: Gershon, T.
name: Ghorbanimoghaddam, Z.
name: Giambastiani, L.
name: Giasemis, F. I.
name: Gibson, V.
name: Giemza, H. K.
name: Gilman, A. L.
name: Giovannetti, M.
name: Gioventù, A.
name: Gironell, P. Gironella
name: Giugliano, C.
name: Giza, M. A.
name: Gkougkousis, E. L.
name: Glaser, F. C.
name: Gligorov, V. V.
name: Göbel, C.
name: Golobardes, E.
name: Golubkov, D.
name: Golutvin, A.
name: Gomes, A.
name: Fernandez, S. Gomez
name: Abrantes, F. Goncalves
name: Goncerz, M.
name: Gong, G.
name: Gooding, J. A.
name: Gorelov, I. V.
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name: Cardoso, L. A. Granado
name: Graugés, E.
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name: Grazette, L.
name: Graziani, G.
name: Grecu, A. T.
name: Greeven, L. M.
name: Grieser, N. A.
name: Grillo, L.
name: Gromov, S.
name: Gu, C.
name: Guarise, M.
name: Guittiere, M.
name: Guliaeva, V.
name: Günther, P. A.
name: Guseinov, A. -K.
name: Gushchin, E.
name: Guz, Y.
name: Gys, T.
name: Hadavizadeh, T.
name: Hadjivasiliou, C.
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name: Halewood-leagas, T.
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name: Hamilton, P. M.
name: Hammerich, J.
name: Han, Q.
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name: Korolev, M.
name: Kostiuk, I.
name: Kot, O.
name: Kotriakhova, S.
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name: Kreps, M.
name: Kretzschmar, S.
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Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The identification of helium nuclei at LHCb is achieved using a method based on measurements of ionisation losses in the silicon sensors and timing measurements in the Outer Tracker drift tubes. The background from photon conversions is reduced using the RICH detectors and an isolation requirement. The method is developed using $pp$ collision data at $\sqrt{s}=13\,{\rm TeV}$ recorded by the LHCb experiment in the years 2016 to 2018, corresponding to an integrated luminosity of $5.5\,{\rm fb}^{-1}$. A total of around $10^5$ helium and antihelium candidates are identified with negligible background contamination. The helium identification efficiency is estimated to be approximately $50\%$ with a corresponding background rejection rate of up to $\mathcal O(10^{12})$. These results demonstrate the feasibility of a rich programme of measurements of QCD and astrophysics interest involving light nuclei.
description: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-DP-2023-002.html (LHCb public pages)