Search for dark matter in events with missing transverse momentum and a Higgs boson decaying into two photons in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

ArXiv 2104.1324 (2021)

Search for new phenomena with top quark pairs in final states with one lepton, jets, and missing transverse momentum in pp collisions at s = 13 TeV with the ATLAS detector

Journal of High Energy Physics Springer Nature 2021:4 (2021) 174

Authors:

G Aad, B Abbott, DC Abbott, A Abed Abud, K Abeling, DK Abhayasinghe, SH Abidi, OS AbouZeid, NL Abraham, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, B Achkar, L Adam, C Adam Bourdarios, L Adamczyk, L Adamek, J Adelman, M Adersberger, A Adiguzel, S Adorni, T Adye, AA Affolder, Y Afik, C Agapopoulou, MN Agaras, A Aggarwal, C Agheorghiesei, JA Aguilar-Saavedra, A Ahmad, F Ahmadov, WS Ahmed, X Ai, G Aielli, S Akatsuka, TPA Åkesson, E Akilli, AV Akimov, K Al Khoury, GL Alberghi, J Albert, MJ Alconada Verzini, S Alderweireldt, M Aleksa, IN Aleksandrov, C Alexa, T Alexopoulos, A Alfonsi, F Alfonsi, M Alhroob, B Ali, S Ali, M Aliev, G Alimonti, C Allaire, BMM Allbrooke, BW Allen, PP Allport, A Aloisio, F Alonso, C Alpigiani, E Alunno Camelia, M Alvarez Estevez, MG Alviggi, Y Amaral Coutinho, A Ambler, L Ambroz, C Amelung, D Amidei, SP Amor Dos Santos, S Amoroso, CS Amrouche, F An, C Anastopoulos, N Andari, T Andeen, JK Anders, SY Andrean, A Andreazza, V Andrei, CR Anelli, S Angelidakis, A Angerami, AV Anisenkov, A Annovi, C Antel, MT Anthony, E Antipov, M Antonelli, DJA Antrim, F Anulli, M Aoki, JA Aparisi Pozo, MA Aparo, L Aperio Bella, N Aranzabal, V Araujo Ferraz, R Araujo Pereira, C Arcangeletti, ATH Arce, FA Arduh, J-F Arguin, S Argyropoulos, J-H Arling, AJ Armbruster, A Armstrong, O Arnaez, H Arnold, ZP Arrubarrena Tame, G Artoni, K Asai, S Asai, T Asawatavonvanich, N Asbah, EM Asimakopoulou, L Asquith, J Assahsah, K Assamagan, R Astalos, RJ Atkin, M Atkinson, NB Atlay, H Atmani, K Augsten, VA Austrup, G Avolio, MK Ayoub, G Azuelos, H Bachacou, K Bachas, M Backes, F Backman, P Bagnaia, M Bahmani, H Bahrasemani, AJ Bailey, VR Bailey, JT Baines, C Bakalis, OK Baker, PJ Bakker, E Bakos, D Bakshi Gupta, S Balaji, EM Baldin, P Balek, F Balli, WK Balunas, J Balz, E Banas, M Bandieramonte, A Bandyopadhyay, Sw Banerjee, L Barak, WM Barbe, EL Barberio, D Barberis, M Barbero, G Barbour, T Barillari, M-S Barisits, J Barkeloo, T Barklow, R Barnea, BM Barnett, RM Barnett, Z Barnovska-Blenessy, A Baroncelli, G Barone, AJ Barr, L Barranco Navarro, F Barreiro, J Barreiro Guimarães da Costa, U Barron, S Barsov, F Bartels, R Bartoldus, G Bartolini, AE Barton, P Bartos, A Basalaev, A Basan, A Bassalat, MJ Basso, RL Bates, S Batlamous, JR Batley, B Batool, M Battaglia, M Bauce, F Bauer, KT Bauer, HS Bawa, JB Beacham, T Beau, PH Beauchemin, F Becherer, P Bechtle, HC Beck, HP Beck, K Becker, C Becot, A Beddall, AJ Beddall, VA Bednyakov, M Bedognetti, CP Bee, TA Beermann, M Begalli, M Begel, A Behera, JK Behr, F Beisiegel, M Belfkir, AS Bell, G Bella, L Bellagamba, A Bellerive, P Bellos, K Beloborodov, K Belotskiy, NL Belyaev, D Benchekroun, N Benekos, Y Benhammou, DP Benjamin, M Benoit, JR Bensinger, S Bentvelsen, L Beresford, M Beretta, D Berge, E Bergeaas Kuutmann, N Berger, B Bergmann, LJ Bergsten, J Beringer, S Berlendis, G Bernardi, C Bernius, FU Bernlochner, T Berry, P Berta, C Bertella, A Berthold, IA Bertram, O Bessidskaia Bylund, N Besson, A Bethani, S Bethke, A Betti, AJ Bevan, J Beyer, DS Bhattacharya, P Bhattarai, VS Bhopatkar, R Bi, RM Bianchi, O Biebel, D Biedermann, R Bielski, K Bierwagen, NV Biesuz, M Biglietti, TRV Billoud, M Bindi, A Bingul, C Bini, S Biondi, CJ Birch-sykes, M Birman, T Bisanz, JP Biswal, D Biswas, A Bitadze, C Bittrich, K Bjørke, T Blazek, I Bloch, C Blocker, A Blue, U Blumenschein, GJ Bobbink, VS Bobrovnikov, SS Bocchetta, D Bogavac, AG Bogdanchikov, C Bohm, V Boisvert, P Bokan, T Bold, AE Bolz, M Bomben, M Bona, JS Bonilla, M Boonekamp, CD Booth, HM Borecka-Bielska, LS Borgna, A Borisov, G Borissov, J Bortfeldt, D Bortoletto, D Boscherini, M Bosman, JD Bossio Sola, K Bouaouda, J Boudreau, EV Bouhova-Thacker, D Boumediene, SK Boutle, A Boveia, J Boyd, D Boye, IR Boyko, AJ Bozson, J Bracinik, N Brahimi, G Brandt, O Brandt, F Braren, B Brau, JE Brau, WD Breaden Madden, K Brendlinger, L Brenner, R Brenner, S Bressler, B Brickwedde, DL Briglin, D Britton, D Britzger, I Brock, R Brock, G Brooijmans, WK Brooks, E Brost, PA Bruckman de Renstrom, B Brüers, D Bruncko, A Bruni, G Bruni, LS Bruni, S Bruno, M Bruschi, N Bruscino, L Bryngemark, T Buanes, Q Buat, P Buchholz, AG Buckley, IA Budagov, MK Bugge, F Bührer, O Bulekov, BA Bullard, TJ Burch, S Burdin, CD Burgard, AM Burger, B Burghgrave, JTP Burr, CD Burton, JC Burzynski, V Büscher, E Buschmann, PJ Bussey, JM Butler, CM Buttar, JM Butterworth, P Butti, W Buttinger, CJ Buxo Vazquez, A Buzatu, AR Buzykaev, G Cabras, S Cabrera Urbán, D Caforio, H Cai, VMM Cairo, O Cakir, N Calace, P Calafiura, G Calderini, P Calfayan, G Callea, LP Caloba, A Caltabiano, S Calvente Lopez, D Calvet, S Calvet, TP Calvet, M Calvetti, R Camacho Toro, S Camarda, D Camarero Munoz, P Camarri, MT Camerlingo, D Cameron, C Camincher, S Campana, M Campanelli, A Camplani, V Canale, A Canesse, M Cano Bret, J Cantero, T Cao, Y Cao, MDM Capeans Garrido, M Capua, R Cardarelli, F Cardillo, G Carducci, I Carli, T Carli, G Carlino, BT Carlson, EM Carlson, L Carminati, RMD Carney, S Caron, E Carquin, S Carrá, G Carratta, JWS Carter, TM Carter, MP Casado, AF Casha, FL Castillo, L Castillo Garcia, V Castillo Gimenez, NF Castro, A Catinaccio, JR Catmore, A Cattai, V Cavaliere, E Cavallaro, V Cavasinni, E Celebi, F Celli, K Cerny, AS Cerqueira, A Cerri, L Cerrito, F Cerutti, A Cervelli, SA Cetin, Z Chadi, D Chakraborty, J Chan, WS Chan, WY Chan, JD Chapman, B Chargeishvili, DG Charlton, TP Charman, CC Chau, S Che, S Chekanov, SV Chekulaev, GA Chelkov, B Chen, C Chen, CH Chen, H Chen, J Chen, J Chen, J Chen, S Chen, SJ Chen, X Chen, Y Chen, Y-H Chen, HC Cheng, HJ Cheng, A Cheplakov, E Cheremushkina, R Cherkaoui El Moursli, E Cheu, K Cheung, TJA Chevalérias, L Chevalier, V Chiarella, G Chiarelli, G Chiodini, AS Chisholm, A Chitan, I Chiu, YH Chiu, MV Chizhov, K Choi, AR Chomont, S Chouridou, YS Chow, LD Christopher, MC Chu, X Chu, J Chudoba, JJ Chwastowski, L Chytka, D Cieri, KM Ciesla, D Cinca, V Cindro, IA Cioară, A Ciocio, F Cirotto, ZH Citron, M Citterio, DA Ciubotaru, BM Ciungu, A Clark, MR Clark, PJ Clark, SE Clawson, C Clement, Y Coadou, M Cobal, A Coccaro, J Cochran, R Coelho Lopes De Sa, H Cohen, AEC Coimbra, B Cole, AP Colijn, J Collot, P Conde Muiño, SH Connell, IA Connelly, S Constantinescu, F Conventi, AM Cooper-Sarkar, F Cormier, KJR Cormier, LD Corpe, M Corradi, EE Corrigan, F Corriveau, MJ Costa, F Costanza, D Costanzo, G Cowan, JW Cowley, J Crane, K Cranmer, RA Creager, S Crépé-Renaudin, F Crescioli, M Cristinziani, V Croft, G Crosetti, A Cueto, T Cuhadar Donszelmann, H Cui, AR Cukierman, WR Cunningham, S Czekierda, P Czodrowski, MM Czurylo, MJ Da Cunha Sargedas De Sousa, JV Da Fonseca Pinto, C Da Via, W Dabrowski, F Dachs, T Dado, S Dahbi, T Dai, C Dallapiccola, M Dam, G D’amen, V D’Amico, J Damp, JR Dandoy, MF Daneri, M Danninger, V Dao, G Darbo, O Dartsi, A Dattagupta, T Daubney, S D’Auria, C David, T Davidek, DR Davis, I Dawson, K De, R De Asmundis, M De Beurs, S De Castro, N De Groot, P de Jong, H De la Torre, A De Maria, D De Pedis, A De Salvo, U De Sanctis, M De Santis, A De Santo, JB De Vivie De Regie, C Debenedetti, DV Dedovich, AM Deiana, J Del Peso, Y Delabat Diaz, D Delgove, F Deliot, CM Delitzsch, M Della Pietra, D Della Volpe, A Dell’Acqua, L Dell’Asta, M Delmastro, C Delporte, PA Delsart, DA DeMarco, S Demers, M Demichev, G Demontigny, SP Denisov, L D’Eramo, D Derendarz, JE Derkaoui, F Derue, P Dervan, K Desch, K Dette, C Deutsch, MR Devesa, PO Deviveiros, FA Di Bello, A Di Ciaccio, L Di Ciaccio, WK Di Clemente, C Di Donato, A Di Girolamo, G Di Gregorio, B Di Micco, R Di Nardo, KF Di Petrillo, R Di Sipio, C Diaconu, FA Dias, T Dias Do Vale, MA Diaz, FG Diaz Capriles, J Dickinson, EB Diehl, J Dietrich, S Díez Cornell, A Dimitrievska, W Ding, J Dingfelder, SJ Dittmeier, F Dittus, F Djama, T Djobava, JI Djuvsland, MAB Do Vale, M Dobre, D Dodsworth, C Doglioni, J Dolejsi, Z Dolezal, M Donadelli, B Dong, J Donini, A D’onofrio, M D’Onofrio, J Dopke, A Doria, MT Dova, AT Doyle, E Drechsler, E Dreyer, T Dreyer, AS Drobac, D Du, TA du Pree, Y Duan, F Dubinin, M Dubovsky, A Dubreuil, E Duchovni, G Duckeck, OA Ducu, D Duda, A Dudarev, AC Dudder, EM Duffield, M D’uffizi, L Duflot, M Dührssen, C Dülsen, M Dumancic, AE Dumitriu, AK Duncan, M Dunford, A Duperrin, H Duran Yildiz, M Düren, A Durglishvili, D Duschinger, B Dutta, D Duvnjak, GI Dyckes, M Dyndal, S Dysch, BS Dziedzic, MG Eggleston, T Eifert, G Eigen, K Einsweiler, T Ekelof, H El Jarrari, V Ellajosyula, M Ellert, F Ellinghaus, AA Elliot, N Ellis, J Elmsheuser, M Elsing, D Emeliyanov, A Emerman, Y Enari, MB Epland, J Erdmann, A Ereditato, PA Erland, M Errenst, M Escalier, C Escobar, O Estrada Pastor, E Etzion, H Evans, MO Evans, A Ezhilov, F Fabbri, L Fabbri, V Fabiani, G Facini, RM Faisca Rodrigues Pereira, RM Fakhrutdinov, S Falciano, PJ Falke, S Falke, J Faltova, Y Fang, Y Fang, G Fanourakis, M Fanti, M Faraj, A Farbin, A Farilla, EM Farina, T Farooque, SM Farrington, P Farthouat, F Fassi, P Fassnacht, D Fassouliotis, M Faucci Giannelli, WJ Fawcett, L Fayard, OL Fedin, W Fedorko, A Fehr, M Feickert, L Feligioni, A Fell, C Feng, M Feng, MJ Fenton, AB Fenyuk, SW Ferguson, J Ferrando, A Ferrante, A Ferrari, P Ferrari, R Ferrari, DE Ferreira de Lima, A Ferrer, D Ferrere, C Ferretti, F Fiedler, A Filipčič, F Filthaut, KD Finelli, MCN Fiolhais, L Fiorini, F Fischer, J Fischer, WC Fisher, T Fitschen, I Fleck, P Fleischmann, T Flick, BM Flierl, L Flores, LR Flores Castillo, FM Follega, N Fomin, JH Foo, GT Forcolin, BC Forland, A Formica, FA Förster, AC Forti, E Fortin, MG Foti, D Fournier, H Fox, P Francavilla, S Francescato, M Franchini, S Franchino, D Francis, L Franco, L Franconi, M Franklin, G Frattari, AN Fray, PM Freeman, B Freund, WS Freund, EM Freundlich, DC Frizzell, D Froidevaux, JA Frost, M Fujimoto, C Fukunaga, E Fullana Torregrosa, T Fusayasu, J Fuster, A Gabrielli, A Gabrielli, S Gadatsch, P Gadow, G Gagliardi, LG Gagnon, GE Gallardo, EJ Gallas, BJ Gallop, G Galster, R Gamboa Goni, KK Gan, S Ganguly, J Gao, Y Gao, YS Gao, FM Garay Walls, C García, JE García Navarro, JA García Pascual, C Garcia-Argos, M Garcia-Sciveres, RW Gardner, N Garelli, S Gargiulo, CA Garner, V Garonne, SJ Gasiorowski, P Gaspar, A Gaudiello, G Gaudio, IL Gavrilenko, A Gavrilyuk, C Gay, G Gaycken, EN Gazis, AA Geanta, CM Gee, CNP Gee, J Geisen, M Geisen, C Gemme, MH Genest, C Geng, S Gentile, S George, T Geralis, LO Gerlach, P Gessinger-Befurt, G Gessner, S Ghasemi, M Ghasemi Bostanabad, M Ghneimat, A Ghosh, A Ghosh, B Giacobbe, S Giagu, N Giangiacomi, P Giannetti, A Giannini, G Giannini, SM Gibson, M Gignac, DT Gil, D Gillberg, G Gilles, DM Gingrich, MP Giordani, PF Giraud, G Giugliarelli, D Giugni, F Giuli, S Gkaitatzis, I Gkialas, EL Gkougkousis, P Gkountoumis, LK Gladilin, C Glasman, J Glatzer, PCF Glaysher, A Glazov, GR Gledhill, I Gnesi, M Goblirsch-Kolb, D Godin, S Goldfarb, T Golling, D Golubkov, A Gomes, R Goncalves Gama, R Gonçalo, G Gonella, L Gonella, A Gongadze, F Gonnella, JL Gonski, S González de la Hoz, S Gonzalez Fernandez, C Gonzalez Renteria, R Gonzalez Suarez, S Gonzalez-Sevilla, GR Gonzalvo Rodriguez, L Goossens, NA Gorasia, PA Gorbounov, HA Gordon, B Gorini, E Gorini, A Gorišek, AT Goshaw, MI Gostkin, CA Gottardo, M Gouighri, AG Goussiou, N Govender, C Goy, I Grabowska-Bold, EC Graham, J Gramling, E Gramstad, S Grancagnolo, M Grandi, V Gratchev, PM Gravila, FG Gravili, C Gray, HM Gray, C Grefe, K Gregersen, IM Gregor, P Grenier, K Grevtsov, C Grieco, NA Grieser, AA Grillo, K Grimm, S Grinstein, J-F Grivaz, S Groh, E Gross, J Grosse-Knetter, ZJ Grout, C Grud, A Grummer, JC Grundy, L Guan, W Guan, C Gubbels, J Guenther, A Guerguichon, JGR Guerrero Rojas, F Guescini, D Guest, R Gugel, T Guillemin, S Guindon, U Gul, J Guo, W Guo, Y Guo, Z Guo, R Gupta, S Gurbuz, G Gustavino, M Guth, P Gutierrez, C Gutschow, C Guyot, C Gwenlan, CB Gwilliam, ES Haaland, A Haas, C Haber, HK Hadavand, A Hadef, M Haleem, J Haley, JJ Hall, G Halladjian, GD Hallewell, K Hamano, H Hamdaoui, M Hamer, GN Hamity, K Han, L Han, S Han, YF Han, K Hanagaki, M Hance, DM Handl, MD Hank, R Hankache, E Hansen, JB Hansen, JD Hansen, MC Hansen, PH Hansen, EC Hanson, K Hara, T Harenberg, S Harkusha, PF Harrison, NM Hartman, NM Hartmann, Y Hasegawa, A Hasib, S Hassani, S Haug, R Hauser, LB Havener, M Havranek, CM Hawkes, RJ Hawkings, S Hayashida, D Hayden, C Hayes, RL Hayes, CP Hays, JM Hays, HS Hayward, SJ Haywood, F He, MP Heath, V Hedberg, S Heer, AL Heggelund, C Heidegger, KK Heidegger, WD Heidorn, J Heilman, S Heim, T Heim, B Heinemann, JG Heinlein, JJ Heinrich, L Heinrich, J Hejbal, L Helary, A Held, S Hellesund, CM Helling, S Hellman, C Helsens, RCW Henderson, Y Heng, L Henkelmann, AM Henriques Correia, H Herde, Y Hernández Jiménez, H Herr, MG Herrmann, T Herrmann, G Herten, R Hertenberger, L Hervas, TC Herwig, GG Hesketh, NP Hessey, H Hibi, A Higashida, S Higashino, E Higón-Rodriguez, K Hildebrand, JC Hill, KK Hill, KH Hiller, SJ Hillier, M Hils, I Hinchliffe, F Hinterkeuser, M Hirose, S Hirose, D Hirschbuehl, B Hiti, O Hladik, DR Hlaluku, J Hobbs, N Hod, MC Hodgkinson, A Hoecker, D Hohn, D Hohov, T Holm, TR Holmes, M Holzbock, LBAH Hommels, TM Hong, JC Honig, A Hönle, BH Hooberman, WH Hopkins, Y Horii, P Horn, LA Horyn, S Hou, A Hoummada, J Howarth, J Hoya, M Hrabovsky, J Hrdinka, J Hrivnac, A Hrynevich, T Hryn’ova, PJ Hsu, S-C Hsu, Q Hu, S Hu, YF Hu, DP Huang, Y Huang, Y Huang, Z Hubacek, F Hubaut, M Huebner, F Huegging, TB Huffman, M Huhtinen, R Hulsken, RFH Hunter, P Huo, N Huseynov, J Huston, J Huth, R Hyneman, S Hyrych, G Iacobucci, G Iakovidis, I Ibragimov, L Iconomidou-Fayard, P Iengo, R Ignazzi, O Igonkina, R Iguchi, T Iizawa, Y Ikegami, M Ikeno, D Iliadis, N Ilic, F Iltzsche, H Imam, G Introzzi, M Iodice, K Iordanidou, V Ippolito, MF Isacson, M Ishino, W Islam, C Issever, S Istin, F Ito, JM Iturbe Ponce, R Iuppa, A Ivina, H Iwasaki, JM Izen, V Izzo, P Jacka, P Jackson, RM Jacobs, BP Jaeger, V Jain, G Jäkel, KB Jakobi, K Jakobs, T Jakoubek, J Jamieson, KW Janas, R Jansky, M Janus, PA Janus, G Jarlskog, AE Jaspan, N Javadov, T Javůrek, M Javurkova, F Jeanneau, L Jeanty, J Jejelava, P Jenni, N Jeong, S Jézéquel, H Ji, J Jia, H Jiang, Y Jiang, Z Jiang, S Jiggins, FA Jimenez Morales, J Jimenez Pena, S Jin, A Jinaru, O Jinnouchi, H Jivan, P Johansson, KA Johns, CA Johnson, RWL Jones, SD Jones, TJ Jones, J Jongmanns, J Jovicevic, X Ju, JJ Junggeburth, A Juste Rozas, A Kaczmarska, M Kado, H Kagan, M Kagan, A Kahn, C Kahra, T Kaji, E Kajomovitz, CW Kalderon, A Kaluza, A Kamenshchikov, M Kaneda, NJ Kang, S Kang, Y Kano, J Kanzaki, LS Kaplan, D Kar, K Karava, MJ Kareem, I Karkanias, SN Karpov, ZM Karpova, V Kartvelishvili, AN Karyukhin, A Kastanas, C Kato, J Katzy, K Kawade, K Kawagoe, T Kawaguchi, T Kawamoto, G Kawamura, EF Kay, S Kazakos, VF Kazanin, R Keeler, R Kehoe, JS Keller, E Kellermann, D Kelsey, JJ Kempster, J Kendrick, KE Kennedy, O Kepka, S Kersten, BP Kerševan, S Ketabchi Haghighat, M Khader, F Khalil-Zada, M Khandoga, A Khanov, AG Kharlamov, T Kharlamova, EE Khoda, A Khodinov, TJ Khoo, G Khoriauli, E Khramov, J Khubua, S Kido, M Kiehn, CR Kilby, E Kim, YK Kim, N Kimura, BT King, A Kirchhoff, D Kirchmeier, J Kirk, AE Kiryunin, T Kishimoto, DP Kisliuk, V Kitali, C Kitsaki, O Kivernyk, T Klapdor-Kleingrothaus, M Klassen, C Klein, MH Klein, M Klein, U Klein, K Kleinknecht, P Klimek, A Klimentov, T Klingl, T Klioutchnikova, FF Klitzner, P Kluit, S Kluth, E Kneringer, EBFG Knoops, A Knue, D Kobayashi, T Kobayashi, M Kobel, M Kocian, T Kodama, P Kodys, DM Koeck, PT Koenig, T Koffas, NM Köhler, M Kolb, I Koletsou, T Komarek, T Kondo, K Köneke, AXY Kong, AC König, T Kono, V Konstantinides, N Konstantinidis, B Konya, R Kopeliansky, S Koperny, K Korcyl, K Kordas, G Koren, A Korn, I Korolkov, EV Korolkova, N Korotkova, O Kortner, S Kortner, VV Kostyukhin, A Kotsokechagia, A Kotwal, A Koulouris, A Kourkoumeli-Charalampidi, C Kourkoumelis, E Kourlitis, V Kouskoura, R Kowalewski, W Kozanecki, AS Kozhin, VA Kramarenko, G 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Quantum track reconstruction algorithms for non-HEP applications

Proceedings of Science 390 (2021)

Authors:

K Novotny, C Tüysüz, C Rieger, D Dobos, K Potamianos, B Demirköz, F Carminati, S Vallecorsa, JR Vlimant, F Fracas

Abstract:

The expected increase in simultaneous collisions creates a challenge for accurate particle track reconstruction in High Luminosity LHC experiments. Similar challenges can be seen in non-HEP trajectory reconstruction use-cases, where tracking and track evaluation algorithms are used. High occupancy, track density, complexity and fast growth therefore exponentially increase the demand of algorithms in terms of time, memory and computing resources. While traditionally Kalman filter (or even simpler algorithms) are used, they are expected to scale worse than quadratic and thus strongly increasing the total processing time. Graph Neural Networks (GNN) are currently explored for HEP, but also non HEP trajectory reconstruction applications. Quantum Computers with their feature of evaluating a very large number of states simultaneously are therefore good candidates for such complex searches in large parameter and graph spaces. In this paper we present our work on implementing a quantum-based graph tracking machine learning algorithm to evaluate Traffic collision avoidance system (TCAS) probabilities of commercial flights.

A search for the decays of stopped long-lived particles at $\sqrt{s}=13$ TeV with the ATLAS detector

ArXiv 2104.0305 (2021)

Measurement of the positive muon anomalous magnetic moment to 0.46 ppm

Physical Review Letters American Physical Society 126 (2021) 141801

Authors:

B Abi, Farrukh Azfar, S Henry

Abstract:

We present the first results of the Fermilab National Accelerator Laboratory (FNAL) Muon g−2 Experiment for the positive muon magnetic anomaly aμ≡(gμ−2)/2. The anomaly is determined from the precision measurements of two angular frequencies. Intensity variation of high-energy positrons from muon decays directly encodes the difference frequency ωa between the spin-precession and cyclotron frequencies for polarized muons in a magnetic storage ring. The storage ring magnetic field is measured using nuclear magnetic resonance probes calibrated in terms of the equivalent proton spin precession frequency ˜ω′p in a spherical water sample at 34.7 °C. The ratio ωa/˜ω′p, together with known fundamental constants, determines aμ(FNAL)=116592040(54)×10−11 (0.46 ppm). The result is 3.3 standard deviations greater than the standard model prediction and is in excellent agreement with the previous Brookhaven National Laboratory (BNL) E821 measurement. After combination with previous measurements of both μ+ and μ−, the new experimental average of aμ(Exp)=116592061(41)×10−11 (0.35 ppm) increases the tension between experiment and theory to 4.2 standard deviations.