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Insertion of STC into TRT at the Department of Physics, Oxford
Credit: CERN

Guy Wilkinson

Professor of Physics

Sub department

  • Particle Physics

Research groups

  • LHCb
Guy.Wilkinson@physics.ox.ac.uk
Telephone: 01865 (2)83110
Denys Wilkinson Building, room 608a
  • About
  • Publications

Model-independent evidence for J/ψp contributions to Λb0 → J/ψpK- decays.

Physical Review Letters American Physical Society 117:8 (2016) 082002

Authors:

Shu-Faye Cheung, Tim Evans, Paolo Gandini, Barak R Gruberg Cadzon, Thomas Hadavizadeh, Neville Harnew, Donal Hill, Pawel G Jalocha, Malcolm John, Oliver J Lupton, Sneha S Malde, Anita K Nandi, Stig Topp-Jorgenson, Guy R Wilkinson

Abstract:

The data sample of Λb0 → J/ψpK- decays acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3  fb^-1, is inspected for the presence of J/ψp or J/ψK- contributions with minimal assumptions about K-p contributions. It is demonstrated at more than nine standard deviations that Λ0b → J/ψpK- decays cannot be described with K-p contributions alone, and that J/ψp contributions play a dominant role in this incompatibility. These model-independent results support the previously obtained model-dependent evidence for P+c → J/ψp charmonium-pentaquark states in the same data sample.
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Production of associated Y and open charm hadrons in pp collisions at √s=7 and 8 TeV via double parton scattering

Journal of High Energy Physics Springer Verlag 2016:52 (2016) 1-35

Authors:

SF Cheung, T Evans, P Gandini, R Gauld, E Greening, T Hadavizadeh, N Harnew, D Hill, N Hussain, J Jalocha, M John, N Harnew, O Lupton, S Malde, A Nandi, E Smith, S Stevenson, C Thomas, S Topp-Joergensen, N Torr, G Wilkinson, N Harnew

Abstract:

Associated production of bottomonia and open charm hadrons in pp collisions at s=7 and 8 TeV is observed using data corresponding to an integrated luminosity of 3 fb−1 accumulated with the LHCb detector. The observation of five combinations, Y(1S)D0, Y(2S)D0, Y(1S)D+, Y(2S)D+ and Y(1S)Ds+, is reported. Production crosssections are measured for Y(1S)D0 and Y(1S)D+ pairs in the forward region. The measured cross-sections and the differential distributions indicate the dominance of double parton scattering as the main production mechanism.
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A precise measurement of the B0 meson oscillation frequency

European Physical Journal C Springer 76:7 (2016) 412

Authors:

Shu-Faye Cheung, Tim Evans, Paolo Gandini, Thomas Hadavizadeh, Neville Harnew, Donal Hill, Pawel G Jalocha, Malcolm John, Oliver J Lupton, Sneha S Malde, Anita K Nandi, Stig Topp-Jorgenson, Guy R Wilkinson

Abstract:

The oscillation frequency, Δ md, of B0 mesons is measured using semileptonic decays with a D- or D∗- meson in the final state. The data sample corresponds to 3.0fb-1 of pp collisions, collected by the LHCb experiment at centre-of-mass energies √s = 7 and 8 TeV. A combination of the two decay modes gives Δmd = (505.0 ± 2.1 ± 1.0) ns-1, where the first uncertainty is statistical and the second is systematic. This is the most precise single measurement of this parameter. It is consistent with the current world average and has similar precision.
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Constraints on the unitarity triangle angle from Dalitz plot analysis of B0 → DK+π− decays

Physical Review D American Physical Society 93:11 (2016) 112018

Authors:

Shu-Faye Cheung, Tim Evans, Paolo Gandini, Thomas Hadavizadeh, Neville Harnew, Donal Hill, Pawel G Jalocha, Malcolm John, Oliver J Lupton, Sneha S Malde, Anita K Nandi, Stig Topp-Jorgenson, Guy R Wilkinson

Abstract:

The first study is presented of CP violation with an amplitude analysis of the Dalitz plot of B0 → DK+π- decays, with D→K+π-, K+K-, and π+π-. The analysis is based on a data sample corresponding to 3.0 fb-1 of pp collisions collected with the LHCb detector. No significant CP violation effect is seen, and constraints are placed on the angle γ of the unitarity triangle formed from elements of the Cabibbo-Kobayashi-Maskawa quark mixing matrix. Hadronic parameters associated with the B0→DK∗(892)0 decay are determined for the first time. These measurements can be used to improve the sensitivity to γ of existing and future studies of the B0 → DK∗(892)0 decay.
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Evidence for exotic hadron contributions to $\Lambda_b^0 \to J/\psi p \pi^-$ decays

(2016)

Authors:

LHCb collaboration, R Aaij, C Abellán Beteta, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, S Amerio, Y Amhis, L An, L Anderlini, G Andreassi, M Andreotti, JE Andrews, RB Appleby, O Aquines Gutierrez, F Archilli, P d'Argent, J Arnau Romeu, A Artamonov, M Artuso, E Aslanides, G Auriemma, M Baalouch, S Bachmann, JJ Back, A Badalov, C Baesso, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, V Batozskaya, V Battista, A Bay, L Beaucourt, J Beddow, F Bedeschi, I Bediaga, LJ Bel, V Bellee, N Belloli, K Belous, I Belyaev, E Ben-Haim, G Bencivenni, S Benson, J Benton, A Berezhnoy, R Bernet, A Bertolin, M-O Bettler, M van Beuzekom, S Bifani, P Billoir, T Bird, A Birnkraut, A Bitadze, A Bizzeti, T Blake, F Blanc, J Blouw, S Blusk, V Bocci, T Boettcher, A Bondar, N Bondar, W Bonivento, S Borghi, M Borisyak, M Borsato, F Bossu, M Boubdir, TJV Bowcock, E Bowen, C Bozzi, S Braun, M Britsch, T Britton, J Brodzicka, E Buchanan, C Burr, A Bursche, J Buytaert, S Cadeddu, R Calabrese, M Calvi, M Calvo Gomez, P Campana, D Campora Perez, L Capriotti, A Carbone, G Carboni, R Cardinale, A Cardini, P Carniti, L Carson, K Carvalho Akiba, G Casse, L Cassina, L Castillo Garcia, M Cattaneo, Ch Cauet, G Cavallero, R Cenci, M Charles, Ph Charpentier, G Chatzikonstantinidis, M Chefdeville, S Chen, S-F Cheung, V Chobanova, M Chrzaszcz, X Cid Vidal, G Ciezarek, PEL Clarke, M Clemencic, HV Cliff, J Closier, V Coco, J Cogan, E Cogneras, V Cogoni, L Cojocariu, G Collazuol, P Collins, A Comerma-Montells, A Contu, A Cook, S Coquereau, G Corti, M Corvo, CM Costa Sobral, B Couturier, GA Cowan, DC Craik, A Crocombe, M Cruz Torres, S Cunliffe, R Currie, C D'Ambrosio, E Dall'Occo, J Dalseno, PNY David, A Davis, O De Aguiar Francisco, K De Bruyn, S De Capua, M De Cian, JM De Miranda, L De Paula, P De Simone, C-T Dean, D Decamp, M Deckenhoff, L Del Buono, M Demmer, D Derkach, O Deschamps, F Dettori, B Dey, A Di Canto, H Dijkstra, F Dordei, M Dorigo, A Dosil Suárez, A Dovbnya, K Dreimanis, L Dufour, G Dujany, K Dungs, P Durante, R Dzhelyadin, A Dziurda, A Dzyuba, N Déléage, S Easo, U Egede, V Egorychev, S Eidelman, S Eisenhardt, U Eitschberger, R Ekelhof, L Eklund, Ch Elsasser, S Ely, S Esen, HM Evans, T Evans, A Falabella, N Farley, S Farry, R Fay, D Ferguson, V Fernandez Albor, F Ferrari, F Ferreira Rodrigues, M Ferro-Luzzi, S Filippov, M Fiore, M Fiorini, M Firlej, C Fitzpatrick, T Fiutowski, F Fleuret, K Fohl, M Fontana, F Fontanelli, DC Forshaw, R Forty, M Frank, C Frei, M Frosini, J Fu, E Furfaro, C Färber, A Gallas Torreira, D Galli, S Gallorini, S Gambetta, M Gandelman, P Gandini, Y Gao, J García Pardiñas, J Garra Tico, L Garrido, PJ Garsed, D Gascon, C Gaspar, L Gavardi, G Gazzoni, D Gerick, E Gersabeck, M Gersabeck, T Gershon, Ph Ghez, S Gianì, V Gibson, OG Girard, L Giubega, K Gizdov, VV Gligorov, D Golubkov, A Golutvin, A Gomes, IV Gorelov, C Gotti, M Grabalosa Gándara, R Graciani Diaz, LA Granado Cardoso, E Graugés, E Graverini, G Graziani, A Grecu, P Griffith, L Grillo, BR Gruberg Cazon, O Grünberg, E Gushchin, Yu Guz, T Gys, C Göbel, T Hadavizadeh, C Hadjivasiliou, G Haefeli, C Haen, SC Haines, S Hall, B Hamilton, X Han, S Hansmann-Menzemer, N Harnew, ST Harnew, J Harrison, J He, T Head, A Heister, K Hennessy, P Henrard, L Henry, JA Hernando Morata, E van Herwijnen, M Heß, A Hicheur, D Hill, C Hombach, W Hulsbergen, T Humair, M Hushchyn, N Hussain, D Hutchcroft, M Idzik, P Ilten, R Jacobsson, A Jaeger, J Jalocha, E Jans, A Jawahery, M John, D Johnson, CR Jones, C Joram, B Jost, N Jurik, S Kandybei, W Kanso, M Karacson, JM Kariuki, S Karodia, M Kecke, M Kelsey, IR Kenyon, M Kenzie, T Ketel, E Khairullin, B Khanji, C Khurewathanakul, T Kirn, S Klaver, K Klimaszewski, S Koliiev, M Kolpin, I Komarov, RF Koopman, P Koppenburg, A Kozachuk, M Kozeiha, L Kravchuk, K Kreplin, M Kreps, P Krokovny, F Kruse, W Krzemien, W Kucewicz, M Kucharczyk, V Kudryavtsev, AK Kuonen, K Kurek, T Kvaratskheliya, D Lacarrere, G Lafferty, A Lai, D Lambert, G Lanfranchi, C Langenbruch, B Langhans, T Latham, C Lazzeroni, R Le Gac, J van Leerdam, J-P Lees, A Leflat, J Lefrançois, R Lefèvre, F Lemaitre, E Lemos Cid, O Leroy, T Lesiak, B Leverington, Y Li, T Likhomanenko, R Lindner, C Linn, F Lionetto, B Liu, X Liu, D Loh, I Longstaff, JH Lopes, D Lucchesi, M Lucio Martinez, H Luo, A Lupato, E Luppi, O Lupton, A Lusiani, X Lyu, F Machefert, F Maciuc, O Maev, K Maguire, S Malde, A Malinin, T Maltsev, G Manca, G Mancinelli, P Manning, J Maratas, JF Marchand, U Marconi, C Marin Benito, P Marino, J Marks, G Martellotti, M Martin, M Martinelli, D Martinez Santos, F Martinez Vidal, D Martins Tostes, LM Massacrier, A Massafferri, R Matev, A Mathad, Z Mathe, C Matteuzzi, A Mauri, B Maurin, A Mazurov, M McCann, J McCarthy, A McNab, R McNulty, B Meadows, F Meier, M Meissner, D Melnychuk, M Merk, E Michielin, DA Milanes, M-N Minard, DS Mitzel, J Molina Rodriguez, IA Monroy, S Monteil, M Morandin, P Morawski, A Mordà, MJ Morello, J Moron, AB Morris, R Mountain, F Muheim, M Mulder, M Mussini, D Müller, J Müller, K Müller, V Müller, P Naik, T Nakada, R Nandakumar, A Nandi, I Nasteva, M Needham, N Neri, S Neubert, N Neufeld, M Neuner, AD Nguyen, C Nguyen-Mau, V Niess, S Nieswand, R Niet, N Nikitin, T Nikodem, A Novoselov, DP O'Hanlon, A Oblakowska-Mucha, V Obraztsov, S Ogilvy, O Okhrimenko, R Oldeman, CJG Onderwater, JM Otalora Goicochea, A Otto, P Owen, A Oyanguren, PR Pais, A Palano, F Palombo, M Palutan, J Panman, A Papanestis, M Pappagallo, LL Pappalardo, C Pappenheimer, W Parker, C Parkes, G Passaleva, GD Patel, M Patel, C Patrignani, A Pearce, A Pellegrino, G Penso, M Pepe Altarelli, S Perazzini, P Perret, L Pescatore, K Petridis, A Petrolini, A Petrov, M Petruzzo, E Picatoste Olloqui, B Pietrzyk, M Pikies, D Pinci, A Pistone, A Piucci, S Playfer, M Plo Casasus, T Poikela, F Polci, A Poluektov, I Polyakov, E Polycarpo, GJ Pomery, A Popov, D Popov, B Popovici, C Potterat, E Price, JD Price, J Prisciandaro, A Pritchard, C Prouve, V Pugatch, A Puig Navarro, G Punzi, W Qian, R Quagliani, B Rachwal, JH Rademacker, M Rama, M Ramos Pernas, MS Rangel, I Raniuk, G Raven, F Redi, S Reichert, AC dos Reis, C Remon Alepuz, V Renaudin, S Ricciardi, S Richards, M Rihl, K Rinnert, V Rives Molina, P Robbe, AB Rodrigues, E Rodrigues, JA Rodriguez Lopez, P Rodriguez Perez, A Rogozhnikov, S Roiser, V Romanovskiy, A Romero Vidal, JW Ronayne, M Rotondo, T Ruf, P Ruiz Valls, JJ Saborido Silva, E Sadykhov, N Sagidova, B Saitta, V Salustino Guimaraes, C Sanchez Mayordomo, B Sanmartin Sedes, R Santacesaria, C Santamarina Rios, M Santimaria, E Santovetti, A Sarti, C Satriano, A Satta, DM Saunders, D Savrina, S Schael, M Schiller, H Schindler, M Schlupp, M Schmelling, T Schmelzer, B Schmidt, O Schneider, A Schopper, M Schubiger, M-H Schune, R Schwemmer, B Sciascia, A Sciubba, A Semennikov, A Sergi, N Serra, J Serrano, L Sestini, P Seyfert, M Shapkin, I Shapoval, Y Shcheglov, T Shears, L Shekhtman, V Shevchenko, A Shires, BG Siddi, R Silva Coutinho, L Silva de Oliveira, G Simi, M Sirendi, N Skidmore, T Skwarnicki, E Smith, IT Smith, J Smith, M Smith, H Snoek, MD Sokoloff, FJP Soler, D Souza, B Souza De Paula, B Spaan, P Spradlin, S Sridharan, F Stagni, M Stahl, S Stahl, P Stefko, S Stefkova, O Steinkamp, O Stenyakin, S Stevenson, S Stoica, S Stone, B Storaci, S Stracka, M Straticiuc, U Straumann, L Sun, W Sutcliffe, K Swientek, V Syropoulos, M Szczekowski, T Szumlak, S T'Jampens, A Tayduganov, T Tekampe, G Tellarini, F Teubert, C Thomas, E Thomas, J van Tilburg, V Tisserand, M Tobin, S Tolk, L Tomassetti, D Tonelli, S Topp-Joergensen, F Toriello, E Tournefier, S Tourneur, K Trabelsi, M Traill, MT Tran, M Tresch, A Trisovic, A Tsaregorodtsev, P Tsopelas, A Tully, N Tuning, A Ukleja, A Ustyuzhanin, U Uwer, C Vacca, V Vagnoni, S Valat, G Valenti, A Vallier, R Vazquez Gomez, P Vazquez Regueiro, S Vecchi, M van Veghel, JJ Velthuis, M Veltri, G Veneziano, A Venkateswaran, M Vesterinen, B Viaud, D Vieira, M Vieites Diaz, X Vilasis-Cardona, V Volkov, A Vollhardt, B Voneki, D Voong, A Vorobyev, V Vorobyev, C Voß, JA de Vries, C Vázquez Sierra, R Waldi, C Wallace, R Wallace, J Walsh, J Wang, DR Ward, HM Wark, NK Watson, D Websdale, A Weiden, M Whitehead, J Wicht, G Wilkinson, M Wilkinson, M Williams, MP Williams, M Williams, T Williams, FF Wilson, J Wimberley, J Wishahi, W Wislicki, M Witek, G Wormser, SA Wotton, K Wraight, S Wright, K Wyllie, Y Xie, Z Xu, Z Yang, H Yin, J Yu, X Yuan, O Yushchenko, M Zangoli, KA Zarebski, M Zavertyaev, L Zhang, Y Zhang, Y Zhang, A Zhelezov, Y Zheng, A Zhokhov, V Zhukov, S Zucchelli
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