Search for $CP$ violation in $D_{(s)}^{+}\rightarrow h^{+}\pi^{0}$ and $D_{(s)}^{+}\rightarrow h^{+}\eta$ decays

+2photon%22&type=SU">eta --> 2photon, D+ --> pi+ eta, D/s+ --> K+ eta, D+ --> K+ pi0, High Energy Physics - Experiment, scattering [p p], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], D+: decay modes, D+ --> pi+ pi0, asymmetry: CP, CERN LHC Coll, pi0 --> electron positron photon, eta --> electron positron photon, decay modes [D+], colliding beams [p p], hadronic decay [D/s+], Particle Physics - Experiment, pi0 --> 2photon, p p: scattering, photon: transition, pi0: radiative decay, D/s+ --> K+ pi0, transition [photon], D+ --> K+ eta, CP [asymmetry], radiative decay [eta], D+: hadronic decay, ddc:530, D/s+: hadronic decay, eta: radiative decay, High Energy Physics::Phenomenology, radiative decay [pi0], LHC-B, D/s+ --> pi+ eta, hadronic decay [D+], High Energy Physics::Experiment, p p: colliding beams, statistical, experimental results -->

Popis:	Journal of high energy physics 06(6), 019 (2021). doi:10.1007/JHEP06(2021)019 Searches for $CP$ violation in the two-body decays $D_{(s)}^{+}\rightarrow h^{+}\pi^{0}$ and $D_{(s)}^{+} \rightarrow h^{+}\eta$ (where $h^{+}$ denotes a $\pi^{+}$ or $K^{+}$ meson) are performed using $pp$ collision data collected by the LHCb experiment corresponding to either 9 fb$^{-1}$ or 6 fb$^{-1}$ of integrated luminosity. The $\pi^{0}$ and $\eta$ mesons are reconstructed using the $e^{+}e^{-}\gamma$ final state, which can proceed as three-body decays $\pi^{0}\rightarrow e^{+}e^{-}\gamma$ and $\eta \rightarrow e^{+}e^{-}\gamma$, or via the two-body decays $\pi^{0}\rightarrow \gamma\gamma$ and $\eta\rightarrow\gamma\gamma$ followed by a photon conversion. The measurements are made relative to the control modes $D_{(s)}^{+}\rightarrow K_{S}^{0} h^{+}$ to cancel the production and detection asymmetries. The $CP$ asymmetries are measured to be \begin{align} \mathcal{A}_{CP}(D^{+}\rightarrow \pi^{+}\pi^{0}) &= (-1.3 \pm 0.9 \pm 0.6 )\%, \end{align}\begin{align} \mathcal{A}_{CP}(D^{+}\rightarrow K^{+}\pi^{0}) &= (-3.2 \pm 4.7 \pm 2.1 )\%, \end{align}\begin{align} \mathcal{A}_{CP}(D^{+}\rightarrow \pi^{+}\eta) &= (-0.2 \pm 0.8 \pm 0.4 )\%, \end{align}\begin{align} \mathcal{A}_{CP}(D^{+}\rightarrow K^{+}\eta) &= (-6 \pm 10 \pm 4 )\%, \end{align}\begin{align} \mathcal{A}_{CP}(D_{s}^{+}\rightarrow K^{+}\pi^{0}) &= (-0.8 \pm 3.9 \pm 1.2 )\%, \end{align}\begin{align} \mathcal{A}_{CP}(D_{s}^{+}\rightarrow \pi^{+}\eta) &= (0.8 \pm 0.7 \pm 0.5 )\%, \end{align}\begin{align} \mathcal{A}_{CP}(D_{s}^{+}\rightarrow K^{+}\eta) &= (0.9 \pm 3.7 \pm 1.1 )\%, \end{align} where the first uncertainties are statistical and the second systematic. These results are consistent with no $CP$ violation and mostly constitute the most precise measurements of $\mathcal{A}_{CP}$ in these decay modes to date. Published by SISSA, [Trieste]
Jazyk:	English
DOI:	10.3204/pubdb-2022-00285
DOI:	10.1007/JHEP06(2021)019⟩
DOI:	10.1007/JHEP06(2021)019
DOI:	10.18154/RWTH-2021-06350
Přístupová URL adresa:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36bd1115bbfacf53915dbc144b64e52d
Rights:	OPEN
Přírůstkové číslo:	edsair.doi.dedup.....36bd1115bbfacf53915dbc144b64e52d
Autor:	LHCb collaboration, Aaij, R., Beteta, C. Abellán, Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C. A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Aliouche, Z., Alkhazov, G., Cartelle, P. Alvarez, 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. J., Rodriguez, P. Baladron, Balagura, V., Baldini, W., Leite, J. Baptista, Barlow, R. J., Barsuk, S., Barter, W., Bartolini, M., Baryshnikov, F., Basels, J. M., 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., Bernard, F., Bernet, R., Berninghoff, D., Bernstein, H. C., Bertella, C., Bertolin, A., Betancourt, C., Betti, F., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bian, L., Bieker, M. S., Bifani, S., Billoir, P., Birch, M., Bishop, F. C. R., Bitadze, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Boelhauve, J. A., Garcia, O. Boente, Boettcher, T., Boldyrev, A., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Borsuk, J. T., Bouchiba, S. A., Bowcock, T. J. V., Boyer, A., Bozzi, C., Bradley, M. J., Braun, S., Rodriguez, A. Brea, Brodski, M., Brodzicka, J., Gonzalo, A. Brossa, Brundu, D., Buonaura, A., Burr, C., Bursche, A., Butkevich, A., Butter, J. S., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calefice, L., Diaz, L. Calero, Cali, S., Calladine, R., Calvi, M., Gomez, M. Calvo, Magalhaes, P. Camargo, Camboni, A., Campana, P., Quezada, A. F. Campoverde, Capelli, S., Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carli, I., Carniti, P., Carus, L., Akiba, K. Carvalho, Vidal, A. Casais, Casse, G., Cattaneo, M., Cavallero, G., Celani, S., Cerasoli, J., Chadwick, A. J., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Barajas, C. A. Chavez, Chefdeville, M., Chen, C., Chen, S., Chernov, A., Chobanova, V., Cholak, S., Chrzaszcz, M., Chubykin, A., Chulikov, V., Ciambrone, P., Cicala, M. F., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Cobbledick, J. L., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Congedo, L., Contu, A., Cooke, N., Coombs, G., Corti, G., Sobral, C. M. Costa, Couturier, B., Craik, D. C., Crkovská, J., Torres, M. Cruz, Currie, R., Da Silva, C. L., Dadabaev, S., Dall'Occo, E., Dalseno, J., D'Ambrosio, C., Danilina, A., d'Argent, P., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, D., De Simone, P., de Vries, J. A., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Dendek, A., Denysenko, V., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Cicco, A., Di Nezza, P., Didenko, S., Maronas, L. Dieste, Dijkstra, H., Dobishuk, V., Donohoe, A. M., Dordei, F., Reis, A. C. dos, Douglas, L., Dovbnya, A., Downes, A. G., Dreimanis, K., Dudek, M. W., Dufour, L., Duk, V., Durante, P., Durham, J. M., Dutta, D., 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., Farry, S., Fazzini, D., Féo, M., Prieto, A. Fernandez, Arribas, J. M. Fernandez-tenllado, Fernez, A. D., Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Sole, S. Ferreres, Ferrillo, M., Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fischer, K. M., Fitzgerald, D., Fitzpatrick, C., Fiutowski, T., Fkiaras, A., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Sevilla, M. Franco, Frank, M., Franzoso, E., Frau, G., Frei, C., Friday, D. A., Fu, J., Fuehring, Q., Funk, W., Gabriel, E., Gaintseva, T., Torreira, A. Gallas, Galli, D., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Garau, M., Martin, L. M. Garcia, Moreno, P. Garcia, Pardiñas, J. García, Plana, B. Garcia, Rosales, F. A. Garcia, Garrido, L., Gaspar, C., Geertsema, R. E., Gerick, D., Gerken, L. L., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gibson, V., Giemza, H. K., Giovannetti, M., Gioventù, A., Gironell, P. Gironella, Giubega, L., Giugliano, C., Gizdov, K., Gkougkousis, E. L., Gligorov, V. V., Göbel, C., Golobardes, E., Golubkov, D., Golutvin, A., Gomes, A., Fernandez, S. Gomez, Abrantes, F. Goncalves, Goncerz, M., Gong, G., Gorbounov, P., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Grammatico, T., Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greeven, L. M., Griffith, P., Grillo, L., Gromov, S., Cazon, B. R. Gruberg, Gu, C., Guarise, M., Günther, P. A., Gushchin, E., Guth, A., Guz, Y., Gys, T., Hadavizadeh, T., Haefeli, G., Haen, C., Haimberger, J., Halewood-leagas, T., Hamilton, P. M., Hammerich, J. P., Han, Q., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harrison, T., Hasse, C., Hatch, M., He, J., Hecker, M., Heijhoff, K., Heinicke, K., Hennequin, A. M., Hennessy, K., Henry, L., Heuel, J., Hicheur, A., Hill, D., Hilton, M., Hollitt, S. E., Hu, J., Hu, W., Hu, X., Huang, W., Huang, X., Hulsbergen, W., Hunter, R. J., 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. K., Jawahery, A., Jevtic, V., Jezabek, M., Jiang, F., John, M., Johnson, D., Jones, C. R., Jones, T. P., Jost, B., Jurik, N., Kandybei, S., Kang, Y., Karacson, M., Karpov, M., Keizer, F., Kenzie, M., Ketel, T., Khanji, B., Kharisova, A., Kholodenko, S., Kirn, T., Kirsebom, V. S., 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. D., Kreps, M., Kress, F., Kretzschmar, S., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuindersma, H. S., Kunde, G. J., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lampis, A., Lancierini, D., Lane, J. J., Lane, R., Lanfranchi, G., Langenbruch, C., Langer, J., Lantwin, O., Latham, T., Lazzari, F., Gac, R. Le, Lee, S. H., Lefèvre, R., Leflat, A., Legotin, S., Leroy, O., Lesiak, T., Leverington, B., Li, H., Li, L., Li, P., Li, S., Li, Y., Li, Z., Liang, X., Lin, T., Lindner, R., Lisovskyi, V., Litvinov, R., Liu, G., Liu, H., Liu, S., Loi, A., Castro, J. Lomba, Longstaff, I., Lopes, J. H., Lovell, G. H., Lu, Y., Lucchesi, D., Luchuk, S., Martinez, M. Lucio, Lukashenko, V., Luo, Y., Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Ma, L., Ma, R., Maccolini, S., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Madejczyk, O., Mohan, L. R. Madhan, Maev, O., Maevskiy, A., Maisuzenko, D., Majewski, M. W., Malczewski, J. J., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Malygina, H., Manca, G., Mancinelli, G., Manuzzi, D., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Mariani, S., Benito, C. Marin, Marinangeli, M., Marks, J., Marshall, A. M., Marshall, P. J., Martellotti, G., Martinazzoli, L., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Materok, M., Matev, R., Mathad, A., Mathe, Z., Matiunin, V., Matteuzzi, C., Mattioli, K. R., Mauri, A., Maurice, E., Mauricio, J., Mazurek, M., McCann, M., Mcconnell, L., Mcgrath, T. H., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meier, G., Meinert, N., Melnychuk, D., Meloni, S., Merk, M., Merli, A., Garcia, L. Meyer, Mikhasenko, M., Milanes, D. A., Millard, E., Milovanovic, M., Minard, M. -N., Minotti, A., Minzoni, L., Mitchell, S. E., Mitreska, B., Mitzel, D. S., Mödden, A., Mohammed, R. A., Moise, R. D., Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Moron, J., Morris, A. B., Morris, A. G., Mountain, R., Mu, H., Muheim, F., Mulder, M., Müller, D., Müller, K., Murphy, C. H., 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. D., Nguyen-Mau, C., Niel, E. M., Nieswand, S., Nikitin, N., Nolte, N. S., Normand, C., Nunez, C., Oblakowska-Mucha, A., Obraztsov, V., O'Hanlon, D. P., Oldeman, R., Olivares, M. E., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Ovsiannikova, T., Owen, P., Oyanguren, A., Pagare, B., Pais, P. R., Pajero, T., Palano, A., Palutan, M., Pan, Y., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Pappenheimer, C., Parker, W., Parkes, C., Parkinson, C. J., Passalacqua, B., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pawley, C. J., Pearce, A., Pellegrino, A., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Petric, M., Petridis, K., Petrolini, A., Petrov, A., Petrucci, S., Petruzzo, M., Pham, T. T. H., Philippov, A., Pica, L., Piccini, M., Pietrzyk, B., Pietrzyk, G., Pili, M., Pinci, D., Pisani, F., K, Resmi P., Placinta, V., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poliakova, M., Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, D., Popov, S., Poslavskii, S., Prasanth, K., Promberger, L., Prouve, C., Pugatch, V., Pullen, H., Punzi, G., Qi, H., Qian, W., Qin, J., Qin, N., Quagliani, R., Quintana, B., Raab, N. V., Trejo, R. I. Rabadan, Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Reboud, M., Redi, F., Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ribatti, R., Ricciardi, S., Rinnert, K., Robbe, P., Robertson, G., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Rollings, A., Roloff, P., Romanovskiy, V., Lamas, M. Romero, Vidal, A. Romero, Roth, J. D., Rotondo, M., Roy, L., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Ryzhikov, A., Ryzka, J., Silva, J. J. Saborido, Sagidova, N., Sahoo, N., Saitta, B., Salomoni, M., Gonzalo, D. Sanchez, Gras, C. Sanchez, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Saranin, D., Sarpis, G., Sarpis, M., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Sazak, H., Smead, L. G. Scantlebury, Scarabotto, A., Schael, S., Schiller, M., Schindler, H., Schmelling, M., Schmidt, B., Schneider, O., Schopper, A., Schubiger, M., Schulte, S., Schune, M. H., Schwemmer, R., Sciascia, B., Sellam, S., Semennikov, A., Soares, M. Senghi, Sergi, A., Serra, N., Sestini, L., Seuthe, A., Seyfert, P., Shang, Y., Shangase, D. M., Shapkin, M., Shchemerov, I., Shchutska, L., Shears, T., Shekhtman, L., Shen, Z., Shevchenko, V., Shields, E. B., Shmanin, E., Shupperd, J. D., Siddi, B. G., Coutinho, R. Silva, Simi, G., Simone, S., Skidmore, N., Skwarnicki, T., Slater, M. W., Slazyk, I., Smallwood, J. C., Smeaton, J. G., Smetkina, A., Smith, E., Smith, M., Snoch, A., Soares, M., Lavra, L. Soares, Sokoloff, M. D., Soler, F. J. P., Solovev, A., Solovyev, I., De Almeida, F. L. Souza, De Paula, B. Souza, Spaan, B., Norella, E. Spadaro, Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Steinkamp, O., Stenyakin, O., Stevens, H., Stone, S., Stramaglia, M. E., Straticiuc, M., Strekalina, D., Suljik, F., Sun, J., Sun, L., Sun, Y., Svihra, P., Swallow, P. N., Swientek, K., Szabelski, A., Szumlak, T., Szymanski, M., Taneja, S., Terentev, A., Teubert, F., Thomas, E., Thomson, K. A., Tisserand, V., T'Jampens, S., Tobin, M., Tomassetti, L., Machado, D. Torres, Tou, D. Y., Tran, M. T., Trifonova, E., Trippl, C., Tuci, G., Tully, A., Tuning, N., Ukleja, A., Unverzagt, D. J., Ursov, E., Usachov, A., Ustyuzhanin, A., Uwer, U., Vagner, A., Vagnoni, V., Valassi, A., Valenti, G., Canudas, N. Valls, van Beuzekom, M., Van Dijk, M., van Herwijnen, E., Van Hulse, C. B., van Veghel, M., Gomez, R. Vazquez, Regueiro, P. Vazquez, Sierra, C. Vázquez, Vecchi, S., Velthuis, J. J., Veltri, M., Venkateswaran, A., Veronesi, M., Vesterinen, M., Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Figueras, E. Vilella, Villa, A., Vincent, P., Bruch, D. Vom, Vorobyev, A., Vorobyev, V., Voropaev, N., Vos, K., Waldi, R., Walsh, J., Wang, C., Wang, J., Wang, M., Wang, R., Wang, Y., Wang, Z., Wark, H. M., Watson, N. K., Weber, S. G., Websdale, D., Weisser, C., Westhenry, B. D. C., White, D. J., Whitehead, M., Wiedner, D., Wilkinson, G., Wilkinson, M., Williams, I., Williams, M., Williams, M. R. J., Wilson, F. F., Wislicki, W., Witek, M., Witola, L., Wormser, G., Wotton, S. A., Wu, H., Wyllie, K., Xiang, Z., Xiao, D., Xie, Y., Xu, A., Xu, J., Xu, L., Xu, M., Xu, Q., Xu, Z., Yang, D., Yang, S., Yang, Y., Yang, Z., Yao, Y., Yeomans, L. E., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zaffaroni, E., Zavertyaev, M., Zdybal, M., Zenaiev, O., Zeng, M., Zhang, D., Zhang, L., Zhang, S., Zhang, Y., Zharkova, A., Zhelezov, A., Zheng, Y., Zhou, X., Zhou, Y., Zhu, X., Zhu, Z., Zhukov, V., Zonneveld, J. B., Zou, Q., Zucchelli, S., Zuliani, D., Zunica, G.
Přispěvatelé:	Laboratoire de Physique de Clermont (LPC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), LHCb
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	eta --> 2photon D+ --> pi+ eta D/s+ --> K+ eta D+ --> K+ pi0 High Energy Physics - Experiment scattering [p p] [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] D+: decay modes D+ --> pi+ pi0 asymmetry: CP CERN LHC Coll pi0 --> electron positron photon eta --> electron positron photon decay modes [D+] colliding beams [p p] hadronic decay [D/s+] Particle Physics - Experiment pi0 --> 2photon p p: scattering photon: transition pi0: radiative decay D/s+ --> K+ pi0 transition [photon] D+ --> K+ eta CP [asymmetry] radiative decay [eta] D+: hadronic decay ddc:530 D/s+: hadronic decay eta: radiative decay High Energy Physics::Phenomenology radiative decay [pi0] LHC-B D/s+ --> pi+ eta hadronic decay [D+] High Energy Physics::Experiment p p: colliding beams statistical experimental results
Zdroj:	JHEP JHEP, 2021, 06, pp.019. ⟨10.1007/JHEP06(2021)019⟩ Journal of high energy physics 06(6), 019 (2021). doi:10.1007/JHEP06(2021)019 Journal of high energy physics : JHEP 2021(6), 19 (2021). doi:10.1007/JHEP06(2021)019 ii, 23 Seiten : Tabelle (2021). doi:10.18154/RWTH-2021-06350
DOI:	10.3204/pubdb-2022-00285
Popis:	Journal of high energy physics 06(6), 019 (2021). doi:10.1007/JHEP06(2021)019 Searches for $CP$ violation in the two-body decays $D_{(s)}^{+}\rightarrow h^{+}\pi^{0}$ and $D_{(s)}^{+} \rightarrow h^{+}\eta$ (where $h^{+}$ denotes a $\pi^{+}$ or $K^{+}$ meson) are performed using $pp$ collision data collected by the LHCb experiment corresponding to either 9 fb$^{-1}$ or 6 fb$^{-1}$ of integrated luminosity. The $\pi^{0}$ and $\eta$ mesons are reconstructed using the $e^{+}e^{-}\gamma$ final state, which can proceed as three-body decays $\pi^{0}\rightarrow e^{+}e^{-}\gamma$ and $\eta \rightarrow e^{+}e^{-}\gamma$, or via the two-body decays $\pi^{0}\rightarrow \gamma\gamma$ and $\eta\rightarrow\gamma\gamma$ followed by a photon conversion. The measurements are made relative to the control modes $D_{(s)}^{+}\rightarrow K_{S}^{0} h^{+}$ to cancel the production and detection asymmetries. The $CP$ asymmetries are measured to be \begin{align} \mathcal{A}_{CP}(D^{+}\rightarrow \pi^{+}\pi^{0}) &= (-1.3 \pm 0.9 \pm 0.6 )\%, \end{align}\begin{align} \mathcal{A}_{CP}(D^{+}\rightarrow K^{+}\pi^{0}) &= (-3.2 \pm 4.7 \pm 2.1 )\%, \end{align}\begin{align} \mathcal{A}_{CP}(D^{+}\rightarrow \pi^{+}\eta) &= (-0.2 \pm 0.8 \pm 0.4 )\%, \end{align}\begin{align} \mathcal{A}_{CP}(D^{+}\rightarrow K^{+}\eta) &= (-6 \pm 10 \pm 4 )\%, \end{align}\begin{align} \mathcal{A}_{CP}(D_{s}^{+}\rightarrow K^{+}\pi^{0}) &= (-0.8 \pm 3.9 \pm 1.2 )\%, \end{align}\begin{align} \mathcal{A}_{CP}(D_{s}^{+}\rightarrow \pi^{+}\eta) &= (0.8 \pm 0.7 \pm 0.5 )\%, \end{align}\begin{align} \mathcal{A}_{CP}(D_{s}^{+}\rightarrow K^{+}\eta) &= (0.9 \pm 3.7 \pm 1.1 )\%, \end{align} where the first uncertainties are statistical and the second systematic. These results are consistent with no $CP$ violation and mostly constitute the most precise measurements of $\mathcal{A}_{CP}$ in these decay modes to date. Published by SISSA, [Trieste]
Databáze:	OpenAIRE
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