An angular analysis of the B0 → K*0e+e− decay is performed using a data sample corresponding to an integrated luminosity of 9 fb−1 of pp collisions collected with the LHCb experiment. The analysis is conducted in the very low dielectron mass squared (q2) interval between 0.0008 and 0.257 GeV2, where the rate is dominated by the B0 → K*0γ transition with a virtual photon. The fraction of longitudinal polarisation of the K*0 meson, FL, is measured to be FL = (4.4 ± 2.6 ± 1.4)%, where the first uncertainty is statistical and the second systematic. The ATRe observable, which is related to the lepton forward-backward asymmetry, is measured to be ATRe = −0.06 ± 0.08 ± 0.02. The AT(2) and ATIm transverse asymmetries, which are sensitive to the virtual photon polarisation, are found to be AT(2) = 0.11 ± 0.10 ± 0.02 and ATIm = 0.02 ± 0.10 ± 0.01. The results are consistent with Standard Model predictions and provide the world’s best constraint on the b → sγ photon polarisation. [Figure not available: see fulltext.]

Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Strong constraints on the b → sγ photon polarisation from B 0 → K *0 e + e − decays. JOURNAL OF HIGH ENERGY PHYSICS, 2020(12) [10.1007/JHEP12(2020)081].

Strong constraints on the b → sγ photon polarisation from B 0 → K *0 e + e − decays

Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Garcia Pardinas J.;Gotti C.;Martinazzoli L.;Martinelli M.;Meloni S.;Petruzzo M.;Shields E.;
2020

Abstract

An angular analysis of the B0 → K*0e+e− decay is performed using a data sample corresponding to an integrated luminosity of 9 fb−1 of pp collisions collected with the LHCb experiment. The analysis is conducted in the very low dielectron mass squared (q2) interval between 0.0008 and 0.257 GeV2, where the rate is dominated by the B0 → K*0γ transition with a virtual photon. The fraction of longitudinal polarisation of the K*0 meson, FL, is measured to be FL = (4.4 ± 2.6 ± 1.4)%, where the first uncertainty is statistical and the second systematic. The ATRe observable, which is related to the lepton forward-backward asymmetry, is measured to be ATRe = −0.06 ± 0.08 ± 0.02. The AT(2) and ATIm transverse asymmetries, which are sensitive to the virtual photon polarisation, are found to be AT(2) = 0.11 ± 0.10 ± 0.02 and ATIm = 0.02 ± 0.10 ± 0.01. The results are consistent with Standard Model predictions and provide the world’s best constraint on the b → sγ photon polarisation. [Figure not available: see fulltext.]
Articolo in rivista - Articolo scientifico
B physics; Flavour Changing Neutral Currents; Hadron-Hadron scattering (experiments); Polarization; Rare decay;
English
Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Strong constraints on the b → sγ photon polarisation from B 0 → K *0 e + e − decays. JOURNAL OF HIGH ENERGY PHYSICS, 2020(12) [10.1007/JHEP12(2020)081].
Aaij, R; Abellan Beteta, C; Ackernley, T; Adeva, B; Adinolfi, M; Afsharnia, H; Aidala, C; Aiola, S; Ajaltouni, Z; Akar, S; Albrecht, J; Alessio, F; Alexander, M; Alfonso Albero, A; Aliouche, Z; Alkhazov, G; Alvarez Cartelle, P; Amato, S; Amhis, Y; An, L; Anderlini, L; Andreianov, A; Andreotti, M; Archilli, F; Artamonov, A; Artuso, M; Arzymatov, K; Aslanides, E; Atzeni, M; Audurier, B; Bachmann, S; Bachmayer, M; Back, J; Baker, S; Baladron Rodriguez, P; Balagura, V; Baldini, W; Baptista Leite, J; Barlow, R; Barsuk, S; Barter, W; Bartolini, M; Baryshnikov, F; Basels, J; Bassi, G; Batsukh, B; Battig, A; Bay, A; Becker, M; Bedeschi, F; Bediaga, I; Beiter, A; Belavin, V; Belin, S; Bellee, V; Belous, K; Belov, I; Belyaev, I; Bencivenni, G; Ben-Haim, E; Berezhnoy, A; Bernet, R; Berninghoff, D; Bernstein, H; Bertella, C; Bertholet, E; Bertolin, A; Betancourt, C; Betti, F; Bettler, M; Bezshyiko, I; Bhasin, S; Bhom, J; Bian, L; Bieker, M; Bifani, S; Billoir, P; Birch, M; Bishop, F; Bizzeti, A; Bjorn, M; Blago, M; Blake, T; Blanc, F; Blusk, S; Bobulska, D; Bocci, V; Boelhauve, J; Boente Garcia, O; Boettcher, T; Boldyrev, A; Bondar, A; Bondar, N; Borghi, S; Borisyak, M; Borsato, M; Borsuk, J; Bouchiba, S; Bowcock, T; Boyer, A; Bozzi, C; Bradley, M; Brandt, J; Braun, S; Brea Rodriguez, A; Brodski, M; Brodzicka, J; Brossa Gonzalo, A; Brundu, D; Buonaura, A; Burr, C; Bursche, A; Butkevich, A; Butter, J; Buytaert, J; Byczynski, W; Cadeddu, S; Cai, H; Calabrese, R; Calefice, L; Calero Diaz, L; Cali, S; Calladine, R; Calvi, M; Calvo Gomez, M; Camargo Magalhaes, P; Camboni, A; Campana, P; Campora Perez, D; Campoverde Quezada, A; Capelli, S; Capriotti, L; Carbone, A; Carboni, G; Cardinale, R; Cardini, A; Carli, I; Carniti, P; Carvalho Akiba, K; Casais Vidal, A; Casse, G; Cattaneo, M; Cavallero, G; Celani, S; Cerasoli, J; Chadwick, A; Chapman, M; Charles, M; Charpentier, P; Chatzikonstantinidis, G; Chavez Barajas, C; Chefdeville, M; Chen, C; Chen, S; Chernov, A; Chitic, S; Chobanova, V; Cholak, S; Chrzaszcz, M; Chubykin, A; Chulikov, V; Ciambrone, P; Cicala, M; Cid Vidal, X; Ciezarek, G; Clarke, P; Clemencic, M; Cliff, H; Closier, J; Cobbledick, J; Coco, V; Coelho, J; Cogan, J; Cogneras, E; Cojocariu, L; Collins, P; Colombo, T; Congedo, L; Contu, A; Cooke, N; Coombs, G; Corti, G; Costa Sobral, C; Couturier, B; Craik, D; Crkovska, J; Cruz Torres, M; Currie, R; Da Silva, C; Dall'Occo, E; Dalseno, J; D'Ambrosio, C; Danilina, A; D'Argent, P; Davis, A; De Aguiar Francisco, O; De Bruyn, K; De Capua, S; De Cian, M; De Miranda, J; De Paula, L; De Serio, M; De Simone, D; De Simone, P; de Vries, J; Dean, C; Dean, W; Decamp, D; Del Buono, L; Delaney, B; Dembinski, H; Dendek, A; Denysenko, V; Derkach, D; Deschamps, O; Desse, F; Dettori, F; Dey, B; Di Nezza, P; Didenko, S; Dieste Maronas, L; Dijkstra, H; Dobishuk, V; Donohoe, A; Dordei, F; Dorigo, M; dos Reis, A; Douglas, L; Dovbnya, A; Downes, A; Dreimanis, K; Dudek, M; Dufour, L; Duk, V; Durante, P; Durham, J; Dutta, D; Dziewiecki, M; Dziurda, A; Dzyuba, A; Easo, S; Egede, U; Egorychev, V; Eidelman, S; Eisenhardt, S; Ek-In, S; Eklund, L; Ely, S; Ene, A; Epple, E; Escher, S; Eschle, J; Esen, S; Evans, T; Falabella, A; Fan, J; Fan, Y; Fang, B; Farley, N; Farry, S; Fazzini, D; Fedin, P; Feo, M; Fernandez Declara, P; Fernandez Prieto, A; Fernandez-tenllado Arribas, J; Ferrari, F; Ferreira Lopes, L; Ferreira Rodrigues, F; Ferreres Sole, S; Ferrillo, M; Ferro-Luzzi, M; Filippov, S; Fini, R; Fiorini, M; Firlej, M; Fischer, K; Fitzpatrick, C; Fiutowski, T; Fleuret, F; Fontana, M; Fontanelli, F; Forty, R; Franco Lima, V; Franco Sevilla, M; Frank, M; Franzoso, E; Frau, G; Frei, C; Friday, D; Fu, J; Fuehring, Q; Funk, W; Gabriel, E; Gaintseva, T; Gallas Torreira, A; Galli, D; Gallorini, S; Gambetta, S; Gan, Y; Gandelman, M; Gandini, P; Gao, Y; Garau, M; Garcia Martin, L; Garcia Moreno, P; Garcia Pardinas, J; Garcia Plana, B; Garcia Rosales, F; Garrido, L; Gascon, D; Gaspar, C; Geertsema, R; Gerick, D; Gerken, L; Gersabeck, E; Gersabeck, M; Gershon, T; Gerstel, D; Ghez, P; Gibson, V; Giovannetti, M; Gioventu, A; Gironella Gironell, P; Giubega, L; Giugliano, C; Gizdov, K; Gkougkousis, E; Gligorov, V; Gobel, C; Golobardes, E; Golubkov, D; Golutvin, A; Gomes, A; Gomez Fernandez, S; Goncalves Abrantes, F; Goncerz, M; Gong, G; Gorbounov, P; Gorelov, I; Gotti, C; Govorkova, E; Grabowski, J; Graciani Diaz, R; Grammatico, T; Granado Cardoso, L; Grauges, E; Graverini, E; Graziani, G; Grecu, A; Greeven, L; Griffith, P; Grillo, L; Gromov, S; Gruber, L; Gruberg Cazon, B; Gu, C; Guarise, M; Gunther, P; Gushchin, E; Guth, A; Guz, Y; Gys, T; Hadavizadeh, T; Haefeli, G; Haen, C; Haimberger, J; Haines, S; Halewood-leagas, T; Hamilton, P; Han, Q; Han, X; Hancock, T; Hansmann-Menzemer, S; Harnew, N; Harrison, T; Hasse, C; Hatch, M; He, J; Hecker, M; Heijhoff, K; Heinicke, K; Hennequin, A; Hennessy, K; Henry, L; Heuel, J; Hicheur, A; Hill, D; Hilton, M; Hollitt, S; Hopchev, P; Hu, J; Hu, J; Hu, W; Huang, W; Huang, X; Hulsbergen, W; Hunter, R; Hushchyn, M; Hutchcroft, D; Hynds, D; Ibis, P; Idzik, M; Ilin, D; Ilten, P; Inglessi, A; Ishteev, A; Ivshin, K; Jacobsson, R; Jakobsen, S; Jans, E; Jashal, B; Jawahery, A; Jevtic, V; Jezabek, M; Jiang, F; John, M; Johnson, D; Jones, C; Jones, T; Jost, B; Jurik, N; Kandybei, S; Kang, Y; Karacson, M; Kariuki, J; Kazeev, N; Kecke, M; Keizer, F; Kenzie, M; Ketel, T; Khanji, B; Kharisova, A; Kholodenko, S; Kim, K; Kirn, T; Kirsebom, V; Kitouni, O; Klaver, S; Klimaszewski, K; Koliiev, S; Kondybayeva, A; Konoplyannikov, A; Kopciewicz, P; Kopecna, R; Koppenburg, P; Korolev, M; Kostiuk, I; Kot, O; Kotriakhova, S; Kravchenko, P; Kravchuk, L; Krawczyk, R; Kreps, M; Kress, F; Kretzschmar, S; Krokovny, P; Krupa, W; Krzemien, W; Kucewicz, W; Kucharczyk, M; Kudryavtsev, V; Kuindersma, H; Kunde, G; Kvaratskheliya, T; Lacarrere, D; Lafferty, G; Lai, A; Lampis, A; Lancierini, D; Lane, J; Lane, R; Lanfranchi, G; Langenbruch, C; Langer, J; Lantwin, O; Latham, T; Lazzari, F; Le Gac, R; Lee, S; Lefevre, R; Leflat, A; Legotin, S; Leroy, O; Lesiak, T; Leverington, B; Li, H; Li, L; Li, P; Li, X; Li, Y; Li, Y; Li, Z; Liang, X; Lin, T; Lindner, R; Lisovskyi, V; Litvinov, R; Liu, G; Liu, H; Liu, S; Liu, X; Loi, A; Lomba Castro, J; Longstaff, I; Lopes, J; Loustau, G; Lovell, G; Lu, Y; Lucchesi, D; Luchuk, S; Lucio Martinez, M; Lukashenko, V; Luo, Y; Lupato, A; Luppi, E; Lupton, O; Lusiani, A; Lyu, X; Ma, L; Maccolini, S; Machefert, F; Maciuc, F; Macko, V; Mackowiak, P; Maddrell-Mander, S; Madejczyk, O; Madhan Mohan, L; Maev, O; Maevskiy, A; Maisuzenko, D; Majewski, M; Malde, S; Malecki, B; Malinin, A; Maltsev, T; Malygina, H; Manca, G; Mancinelli, G; Manera Escalero, R; Manuzzi, D; Marangotto, D; Maratas, J; Marchand, J; Marconi, U; Mariani, S; Marin Benito, C; Marinangeli, M; Marino, P; Marks, J; Marshall, P; Martellotti, G; Martinazzoli, L; Martinelli, M; Martinez Santos, D; Martinez Vidal, F; Massafferri, A; Materok, M; Matev, R; Mathad, A; Mathe, Z; Matiunin, V; Matteuzzi, C; Mattioli, K; Mauri, A; Maurice, E; Mauricio, J; Mazurek, M; Mccann, M; Mcconnell, L; Mcgrath, T; Mcnab, A; Mcnulty, R; Mead, J; Meadows, B; Meaux, C; Meier, G; Meinert, N; Melnychuk, D; Meloni, S; Merk, M; Merli, A; Meyer Garcia, L; Mikhasenko, M; Milanes, D; Millard, E; Milovanovic, M; Minard, M; Minzoni, L; Mitchell, S; Mitreska, B; Mitzel, D; Modden, A; Mohammed, R; Moise, R; Mombacher, T; Monroy, I; Monteil, S; Morandin, M; Morello, G; Morello, M; Moron, J; Morris, A; Morris, A; Mountain, R; Mu, H; Muheim, F; Mukherjee, M; Mulder, M; Muller, D; Muller, K; Murphy, C; Murray, D; Muzzetto, P; Naik, P; Nakada, T; Nandakumar, R; Nanut, T; Nasteva, I; Needham, M; Neri, I; Neri, N; Neubert, S; Neufeld, N; Newcombe, R; Nguyen, T; Nguyen-Mau, C; Niel, E; Nieswand, S; Nikitin, N; Nolte, N; Nunez, C; Oblakowska-Mucha, A; Obraztsov, V; O'Hanlon, D; Oldeman, R; Onderwater, C; Ossowska, A; Otalora Goicochea, J; Ovsiannikova, T; Owen, P; Oyanguren, A; Pagare, B; Pais, P; Pajero, T; Palano, A; Palutan, M; Pan, Y; Panshin, G; Papanestis, A; Pappagallo, M; Pappalardo, L; Pappenheimer, C; Parker, W; Parkes, C; Parkinson, C; Passalacqua, B; Passaleva, G; Pastore, A; Patel, M; Patrignani, C; Pawley, C; Pearce, A; Pellegrino, A; Pepe Altarelli, M; Perazzini, S; Pereima, D; Perret, P; Petridis, K; Petrolini, A; Petrov, A; Petrucci, S; Petruzzo, M; Philippov, A; Pica, L; Piccini, M; Pietrzyk, B; Pietrzyk, G; Pili, M; Pinci, D; Pinzino, J; Pisani, F; Piucci, A; Resmi, P; Placinta, V; Playfer, S; Plews, J; Plo Casasus, M; Polci, F; Poli Lener, M; Poliakova, M; Poluektov, A; Polukhina, N; Polyakov, I; Polycarpo, E; Pomery, G; Ponce, S; Popov, A; Popov, D; Popov, S; Poslavskii, S; Prasanth, K; Promberger, L; Prouve, C; Pugatch, V; Puig Navarro, A; Pullen, H; Punzi, G; Qian, W; Qin, J; Quagliani, R; Quintana, B; Raab, N; Rabadan Trejo, R; Rachwal, B; Rademacker, J; Rama, M; Ramos Pernas, M; Rangel, M; Ratnikov, F; Raven, G; Reboud, M; Redi, F; Reiss, F; Remon Alepuz, C; Ren, Z; Renaudin, V; Ribatti, R; Ricciardi, S; Richards, D; Rinnert, K; Robbe, P; Robert, A; Robertson, G; Rodrigues, A; Rodrigues, E; Rodriguez Lopez, J; Rollings, A; Roloff, P; Romanovskiy, V; Romero Lamas, M; Romero Vidal, A; Roth, J; Rotondo, M; Rudolph, M; Ruf, T; Ruiz Vidal, J; Ryzhikov, A; Ryzka, J; Saborido Silva, J; Sagidova, N; Sahoo, N; Saitta, B; Sanchez Gonzalo, D; Sanchez Gras, C; Sanchez Mayordomo, C; Santacesaria, R; Santamarina Rios, C; Santimaria, M; Santovetti, E; Saranin, D; Sarpis, G; Sarpis, M; Sarti, A; Satriano, C; Satta, A; Saur, M; Savrina, D; Sazak, H; Scantlebury Smead, L; Schael, S; Schellenberg, M; Schiller, M; Schindler, H; Schmelling, M; Schmelzer, T; Schmidt, B; Schneider, O; Schopper, A; Schubiger, M; Schulte, S; Schune, M; Schwemmer, R; Sciascia, B; Sciubba, A; Sellam, S; Semennikov, A; Senghi Soares, M; Sergi, A; Serra, N; Serrano, J; Sestini, L; Seuthe, A; Seyfert, P; Shangase, D; Shapkin, M; Shchemerov, I; Shchutska, L; Shears, T; Shekhtman, L; Shen, Z; Shevchenko, V; Shields, E; Shmanin, E; Shupperd, J; Siddi, B; Silva Coutinho, R; Simi, G; Simone, S; Skiba, I; Skidmore, N; Skwarnicki, T; Slater, M; Smallwood, J; Smeaton, J; Smetkina, A; Smith, E; Smith, M; Snoch, A; Soares, M; Soares Lavra, L; Sokoloff, M; Soler, F; Solovev, A; Solovyev, I; Souza De Almeida, F; Souza De Paula, B; Spaan, B; Spadaro Norella, E; Spradlin, P; Stagni, F; Stahl, M; Stahl, S; Stefko, P; Steinkamp, O; Stemmle, S; Stenyakin, O; Stevens, H; Stone, S; Stramaglia, M; Straticiuc, M; Strekalina, D; Strokov, S; Suljik, F; Sun, J; Sun, L; Sun, Y; Svihra, P; Swallow, P; Swientek, K; Szabelski, A; Szumlak, T; Szymanski, M; Taneja, S; Tang, Z; Tekampe, T; Teubert, F; Thomas, E; Thomson, K; Tilley, M; Tisserand, V; T'Jampens, S; Tobin, M; Tolk, S; Tomassetti, L; Torres Machado, D; Tou, D; Traill, M; Tran, M; Trifonova, E; Trippl, C; Tsaregorodtsev, A; Tuci, G; Tully, A; Tuning, N; Ukleja, A; Unverzagt, D; Usachov, A; Ustyuzhanin, A; Uwer, U; Vagner, A; Vagnoni, V; Valassi, A; Valenti, G; Canudas, N; van Beuzekom, M; Van Hecke, H; van Herwijnen, E; Van Hulse, C; van Veghel, M; Vazquez Gomez, R; Vazquez Regueiro, P; Vazquez Sierra, C; Vecchi, S; Velthuis, J; Veltri, M; Venkateswaran, A; Veronesi, M; Vesterinen, M; Vieira, D; Vieites Diaz, M; Viemann, H; Vilasis-Cardona, X; Vilella Figueras, E; Vincent, P; Vitali, G; Vollhardt, A; Vom Bruch, D; Vorobyev, A; Vorobyev, V; Voropaev, N; Waldi, R; Walsh, J; Wang, C; Wang, J; Wang, J; Wang, J; Wang, J; Wang, M; Wang, R; Wang, Y; Wang, Z; Ward, D; Wark, H; Watson, N; Weber, S; Websdale, D; Weisser, C; Westhenry, B; White, D; Whitehead, M; Wiedner, D; Wilkinson, G; Wilkinson, M; Williams, I; Williams, M; Williams, M; Wilson, F; Wislicki, W; Witek, M; Witola, L; Wormser, G; Wotton, S; Wu, H; Wyllie, K; Xiang, Z; Xiao, D; Xie, Y; Xing, H; Xu, A; Xu, J; Xu, L; Xu, M; Xu, Q; Xu, Z; Xu, Z; Yang, D; Yang, Y; Yang, Z; Yang, Z; Yao, Y; Yeomans, L; Yin, H; Yu, J; Yuan, X; Yushchenko, O; Zarebski, K; Zavertyaev, M; Zdybal, M; Zenaiev, O; Zeng, M; Zhang, D; Zhang, L; Zhang, S; Zhang, Y; Zhang, Y; Zhelezov, A; Zheng, Y; Zhou, X; Zhou, Y; Zhu, X; Zhukov, V; Zonneveld, J; Zucchelli, S; Zuliani, D; Zunica, G
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/301686
Citazioni
  • Scopus 15
  • ???jsp.display-item.citation.isi??? 15
Social impact