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Start Over Author "B. C., Allanach" Journal european physical journal c: particles and fields
11 results on '"B. C., Allanach"'

1. Hide and seek with the third family hypercharge model’s $$Z^\prime $$ Z ′ at the large hadron collider

Author

B. C. Allanach and Hannah Banks

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The Third Family Hypercharge Model predicts a $$Z^\prime $$ Z ′ gauge boson with flavour dependent couplings which has been used to explain anomalies in meson decay processes which involve the $$b\rightarrow s\mu ^+\mu ^-$$ b → s μ + μ - transition. The model predicts that a TeV-scale $$Z^\prime $$ Z ′ should decay to particle-antiparticle pairs of muons, taus, top quarks and bottom quarks with appreciable branching ratios. We reinterpret various ATLAS and CMS search limits for $$Z^\prime $$ Z ′ production followed by such decays at the LHC over a parameter space of the model that results from a successful combined fit to the $$b\rightarrow s l^+ l^-$$ b → s l + l - data and precision electroweak observables. Current exclusions in parameter space and expected sensitivities of the various different channels in the high-luminosity run are compared. We find that the high-luminosity run of the LHC will significantly increase the sensitivity to the model beyond the existing empirical limits, which we find to be surprisingly weak.

Published
2022
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2. Large hadron collider constraints on some simple $$Z^\prime $$ Z ′ models for $$b\rightarrow s \mu ^+\mu ^-$$ b → s μ + μ - anomalies

Author

B. C. Allanach, J. M. Butterworth, and Tyler Corbett

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract We examine current Large Hadron Collider constraints on some simple $$Z^\prime $$ Z ′ models that significantly improve on Standard Model fits to $$b\rightarrow s \mu ^+\mu ^-$$ b → s μ + μ - transition data. The models that we consider are the ‘third family baryon number minus second family lepton number’ ( $${B_3-L_2}$$ B 3 - L 2 ) model and the ‘third family hypercharge’ model and variants. The constraints are applied on parameter regions of each model that fit the $$b\rightarrow s \mu ^+\mu ^-$$ b → s μ + μ - transition data and come from high-mass Drell–Yan di-muons and measurements of Standard Model processes. This latter set of observables place particularly strong bounds upon the parameter space of the $${B_3-L_2}$$ B 3 - L 2 model when the mass of the $$Z^\prime $$ Z ′ boson is less than 300 GeV.

Published
2021
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3. Global fits of third family hypercharge models to neutral current B-anomalies and electroweak precision observables

Author

B. C. Allanach, J. Eliel Camargo-Molina, and Joe Davighi

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract While it is known that third family hypercharge models can explain the neutral current B-anomalies, it was hitherto unclear whether the $$Z-Z^\prime $$ Z - Z ′ mixing predicted by such models could simultaneously fit electroweak precision observables. Here, we perform global fits of several third family hypercharge models to a combination of electroweak data and those data pertinent to the neutral current B-anomalies. While the Standard Model is in tension with this combined data set with a p-value of .0007, simple versions of the models (fitting two additional parameters each) provide much improved fits. The original Third Family Hypercharge Model, for example, has a p-value of $${.065}$$ . 065 , with $$\sqrt{\Delta \chi ^2}=6.5\sigma $$ Δ χ 2 = 6.5 σ .

Published
2021
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4. Higgs-mass predictions in the MSSM and beyond

Author

P. Slavich, S. Heinemeyer, E. Bagnaschi, H. Bahl, M. Goodsell, H. E. Haber, T. Hahn, R. Harlander, W. Hollik, G. Lee, M. Mühlleitner, S. Paßehr, H. Rzehak, D. Stöckinger, A. Voigt, C. E. M. Wagner, G. Weiglein, B. C. Allanach, T. Biekötter, S. Borowka, J. Braathen, M. Carena, T. N. Dao, G. Degrassi, F. Domingo, P. Drechsel, U. Ellwanger, M. Gabelmann, R. Gröber, J. Klappert, T. Kwasnitza, D. Meuser, L. Mihaila, N. Murphy, K. Nickel, W. Porod, E. A. Reyes Rojas, I. Sobolev, and F. Staub

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Predictions for the Higgs masses are a distinctive feature of supersymmetric extensions of the Standard Model, where they play a crucial role in constraining the parameter space. The discovery of a Higgs boson and the remarkably precise measurement of its mass at the LHC have spurred new efforts aimed at improving the accuracy of the theoretical predictions for the Higgs masses in supersymmetric models. The “Precision SUSY Higgs Mass Calculation Initiative” (KUTS) was launched in 2014 to provide a forum for discussions between the different groups involved in these efforts. This report aims to present a comprehensive overview of the current status of Higgs-mass calculations in supersymmetric models, to document the many advances that were achieved in recent years and were discussed during the KUTS meetings, and to outline the prospects for future improvements in these calculations.

Published
2021
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5. $$U(1)_{B_3-L_2}$$ U ( 1 ) B 3 - L 2 explanation of the neutral current $$B-$$ B - anomalies

Author

B. C. Allanach

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract We investigate a speculative short-distance force, proposed to explain discrepancies observed between measurements of certain neutral current decays of B hadrons and their Standard Model predictions. The force derives from a spontaneously broken, gauged $$U(1)_{B_3-L_2}$$ U ( 1 ) B 3 - L 2 extension to the Standard Model, where the extra quantum numbers of Standard Model fields are given by third family baryon number minus second family lepton number. The only fields beyond those of the Standard Model are three right-handed neutrinos, a gauge field associated with $$U(1)_{B_3-L_2}$$ U ( 1 ) B 3 - L 2 and a Standard Model singlet complex scalar which breaks $$U(1)_{B_3-L_2}$$ U ( 1 ) B 3 - L 2 , a ‘flavon’. This simple model, via interactions involving a TeV scale force-carrying $$Z^\prime $$ Z ′ vector boson, can successfully explain the neutral current $$B-$$ B - anomalies whilst accommodating other empirical constraints. In an ansatz for fermion mixing, a combination of up-to-date $$B-$$ B - anomaly fits, LHC direct $$Z^\prime $$ Z ′ search limits and other bounds rule out the domain 0.15 $$\hbox {TeV}< M_{Z^\prime }

Published
2021
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6. Sensitivity of future hadron colliders to leptoquark pair production in the di-muon di-jets channel

Author

B. C. Allanach, Tyler Corbett, and Maeve Madigan

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract We estimate the future sensitivity of the high luminosity (HL-) and high energy (HE-) modes of the Large Hadron Collider (LHC) and of a 100 TeV future circular collider (FCC-hh) to leptoquark (LQ) pair production in the muon-plus-jet decay mode of each LQ. Such LQs are motivated by the fact that they provide an explanation for the neutral current B-anomalies. For each future collider, Standard Model (SM) backgrounds and detector effects are simulated. From these, sensitivities of each collider are found. Our measures of sensitivity are based upon a Run II ATLAS search, which we also use for validation. We illustrate with a narrow scalar (‘$$S_3$$ S3 ’) LQ and find that, in our channel, the HL-LHC has exclusion sensitivity to LQ masses up to 1.8 TeV, the HE-LHC up to 4.8 TeV and the FCC-hh up to 13.5 TeV.

Published
2020
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7. Naturalising the third family hypercharge model for neutral current $$B{-}\hbox {anomalies}$$ B-anomalies

Author

B. C. Allanach and Joe Davighi

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract We consider a deformation of the Third Family Hypercharge Model, which arguably makes the model more natural. Additional non-zero charges of the spontaneously broken, family-dependent $$U(1)_F$$ U(1)F gauge symmetry are assigned to the second family leptons, and the third family leptons’ charges are deformed away from their hypercharges in such a way that the $$U(1)_F$$ U(1)F gauge symmetry remains anomaly-free. Second family $$U(1)_F$$ U(1)F lepton charges allow a $$Z^\prime $$ Z′ coupling to muons without having to assume large charged lepton mixing, which risks violating tight lepton flavour violation bounds. In this deformed version, only the bottom and top Yukawa couplings are generated at the renormalisable level, whereas the tauon Yukawa coupling is absent. The $$Z^\prime $$ Z′ mediates a beyond the Standard Model contribution to an effective $$({\bar{b}} s) (\bar{\mu }\mu )$$ (b¯s)(μ¯μ) vertex in the combination $$C_9=-9C_{10}$$ C9=-9C10 and is able to fit the apparent discrepancy between Standard Model predictions in flavour changing neutral-current $$B-$$ B- meson decays and their measurements, whilst simultaneously avoiding current constraints from direct $$Z^\prime $$ Z′ searches and other measurements, when $$0.8~\text {TeV}< M_{Z^\prime } < 12.5 ~\text {TeV}$$ 0.8TeV

Published
2019
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8. FCC Physics Opportunities

Author

A. Abada, M. Abbrescia, S. S. AbdusSalam, I. Abdyukhanov, J. Abelleira Fernandez, A. Abramov, M. Aburaia, A. O. Acar, P. R. Adzic, P. Agrawal, J. A. Aguilar-Saavedra, J. J. Aguilera-Verdugo, M. Aiba, I. Aichinger, G. Aielli, A. Akay, A. Akhundov, H. Aksakal, J. L. Albacete, S. Albergo, A. Alekou, M. Aleksa, R. Aleksan, R. M. Alemany Fernandez, Y. Alexahin, R. G. Alía, S. Alioli, N. Alipour Tehrani, B. C. Allanach, P. P. Allport, M. Altınlı, W. Altmannshofer, G. Ambrosio, D. Amorim, O. Amstutz, L. Anderlini, A. Andreazza, M. Andreini, A. Andriatis, C. Andris, A. Andronic, M. Angelucci, F. Antinori, S. A. Antipov, M. Antonelli, M. Antonello, P. Antonioli, S. Antusch, F. Anulli, L. Apolinário, G. Apollinari, A. Apollonio, D. Appelö, R. B. Appleby, Ara. Apyan, Arm. Apyan, A. Arbey, A. Arbuzov, G. Arduini, V. Arı, S. Arias, N. Armesto, R. Arnaldi, S. A. Arsenyev, M. Arzeo, S. Asai, E. Aslanides, R. W. Aßmann, D. Astapovych, M. Atanasov, S. Atieh, D. Attié, B. Auchmann, A. Audurier, S. Aull, S. Aumon, S. Aune, F. Avino, G. Avrillaud, G. Aydın, A. Azatov, G. Azuelos, P. Azzi, O. Azzolini, P. Azzurri, N. Bacchetta, E. Bacchiocchi, H. Bachacou, Y. W. Baek, V. Baglin, Y. Bai, S. Baird, M. J. Baker, M. J. Baldwin, A. H. Ball, A. Ballarino, S. Banerjee, D. P. Barber, D. Barducci, P. Barjhoux, D. Barna, G. G. Barnaföldi, M. J. Barnes, A. Barr, J. Barranco García, J. Barreiro Guimarães da Costa, W. Bartmann, V. Baryshevsky, E. Barzi, S. A. Bass, A. Bastianin, B. Baudouy, F. Bauer, M. Bauer, T. Baumgartner, I. Bautista-Guzmán, C. Bayındır, F. Beaudette, F. Bedeschi, M. Béguin, I. Bellafont, L. Bellagamba, N. Bellegarde, E. Belli, E. Bellingeri, F. Bellini, G. Bellomo, S. Belomestnykh, G. Bencivenni, M. Benedikt, G. Bernardi, J. Bernardi, C. Bernet, J. M. Bernhardt, C. Bernini, C. Berriaud, A. Bertarelli, S. Bertolucci, M. I. Besana, M. Besançon, O. Beznosov, P. Bhat, C. Bhat, M. E. Biagini, J.-L. Biarrotte, A. Bibet Chevalier, E. R. Bielert, M. Biglietti, G. M. Bilei, B. Bilki, C. Biscari, F. Bishara, O. R. Blanco-García, F. R. Blánquez, F. Blekman, A. Blondel, J. Blümlein, T. Boccali, R. Boels, S. A. Bogacz, A. Bogomyagkov, O. Boine-Frankenheim, M. J. Boland, S. Bologna, O. Bolukbasi, M. Bomben, S. Bondarenko, M. Bonvini, E. Boos, B. Bordini, F. Bordry, G. Borghello, L. Borgonovi, S. Borowka, D. Bortoletto, D. Boscherini, M. Boscolo, S. Boselli, R. R. Bosley, F. Bossu, C. Botta, L. Bottura, R. Boughezal, D. Boutin, G. Bovone, I. Božović Jelisavc̆ić, A. Bozbey, C. Bozzi, D. Bozzini, V. Braccini, S. Braibant-Giacomelli, J. Bramante, P. Braun-Munzinger, J. A. Briffa, D. Britzger, S. J. Brodsky, J. J. Brooke, R. Bruce, P. Brückman De Renstrom, E. Bruna, O. Brüning, O. Brunner, K. Brunner, P. Bruzzone, X. Buffat, E. Bulyak, F. Burkart, H. Burkhardt, J.-P. Burnet, F. Butin, D. Buttazzo, A. Butterworth, M. Caccia, Y. Cai, B. Caiffi, V. Cairo, O. Cakir, R. Calaga, S. Calatroni, G. Calderini, G. Calderola, A. Caliskan, D. Calvet, M. Calviani, J. M. Camalich, P. Camarri, M. Campanelli, T. Camporesi, A. C. Canbay, A. Canepa, E. Cantergiani, D. Cantore-Cavalli, M. Capeans, R. Cardarelli, U. Cardella, A. Cardini, C. M. Carloni Calame, F. Carra, S. Carra, A. Carvalho, S. Casalbuoni, J. Casas, M. Cascella, P. Castelnovo, G. Castorina, G. Catalano, V. Cavasinni, E. Cazzato, E. Cennini, A. Cerri, F. Cerutti, J. Cervantes, I. Chaikovska, J. Chakrabortty, M. Chala, M. Chamizo-Llatas, H. Chanal, D. Chanal, S. Chance, A. Chancé, P. Charitos, J. Charles, T. K. Charles, S. Chattopadhyay, R. Chehab, S. V. Chekanov, N. Chen, A. Chernoded, V. Chetvertkova, L. Chevalier, G. Chiarelli, G. Chiarello, M. Chiesa, P. Chiggiato, J. T. Childers, A. Chmielińska, A. Cholakian, P. Chomaz, M. Chorowski, W. Chou, M. Chrzaszcz, E. Chyhyrynets, G. Cibinetto, A. K. Ciftci, R. Ciftci, R. Cimino, M. Ciuchini, P. J. Clark, Y. Coadou, M. Cobal, A. Coccaro, J. Cogan, E. Cogneras, F. Collamati, C. Colldelram, P. Collier, J. Collot, R. Contino, F. Conventi, C. T. A. Cook, L. Cooley, G. Corcella, A. S. Cornell, G. H. Corral, H. Correia-Rodrigues, F. Costanza, P. Costa Pinto, F. Couderc, J. Coupard, N. Craig, I. Crespo Garrido, A. Crivellin, J. F. Croteau, M. Crouch, E. Cruz Alaniz, B. Curé, J. Curti, D. Curtin, M. Czech, C. Dachauer, R. T. D’Agnolo, M. Daibo, A. Dainese, B. Dalena, A. Daljevec, W. Dallapiazza, L. D’Aloia Schwartzentruber, M. Dam, G. D’Ambrosio, S. P. Das, S. DasBakshi, W. da Silva, G. G. da Silveira, V. D’Auria, S. D’Auria, A. David, T. Davidek, A. Deandrea, J. de Blas, C. J. Debono, S. De Curtis, N. De Filippis, D. de Florian, S. Deghaye, S. J. de Jong, C. Del Bo, V. Del Duca, D. Delikaris, F. Deliot, A. Dell’Acqua, L. Delle Rose, M. Delmastro, E. De Lucia, M. Demarteau, D. Denegri, L. Deniau, D. Denisov, H. Denizli, A. Denner, D. d’Enterria, G. de Rijk, A. De Roeck, F. Derue, O. Deschamps, S. Descotes-Genon, P. S. B. Dev, J. B. de Vivie de Régie, R. K. Dewanjee, A. Di Ciaccio, A. Di Cicco, B. M. Dillon, B. Di Micco, P. Di Nezza, S. Di Vita, A. Doblhammer, A. Dominjon, M. D’Onofrio, F. Dordei, A. Drago, P. Draper, Z. Drasal, M. Drewes, L. Duarte, I. Dubovyk, P. Duda, A. Dudarev, L. Dudko, D. Duellmann, M. Dünser, T. du Pree, M. Durante, H. Duran Yildiz, S. Dutta, F. Duval, J. M. Duval, Ya. Dydyshka, B. Dziewit, S. Eisenhardt, M. Eisterer, T. Ekelof, D. El Khechen, S. A. Ellis, J. Ellis, J. A. Ellison, K. Elsener, M. Elsing, Y. Enari, C. Englert, H. Eriksson, K. J. Eskola, L. S. Esposito, O. Etisken, E. Etzion, P. Fabbricatore, A. Falkowski, A. Falou, J. Faltova, J. Fan, L. Fanò, A. Farilla, R. Farinelli, S. Farinon, D. A. Faroughy, S. D. Fartoukh, A. Faus-Golfe, W. J. Fawcett, G. Felici, L. Felsberger, C. Ferdeghini, A. M. Fernandez Navarro, A. Fernández-Téllez, J. Ferradas Troitino, G. Ferrara, R. Ferrari, L. Ferreira, P. Ferreira da Silva, G. Ferrera, F. Ferro, M. Fiascaris, S. Fiorendi, C. Fiorio, O. Fischer, E. Fischer, W. Flieger, M. Florio, D. Fonnesu, E. Fontanesi, N. Foppiani, K. Foraz, D. Forkel-Wirth, S. Forte, M. Fouaidy, D. Fournier, T. Fowler, J. Fox, P. Francavilla, R. Franceschini, S. Franchino, E. Franco, A. Freitas, B. Fuks, K. Furukawa, S. V. Furuseth, E. Gabrielli, A. Gaddi, M. Galanti, E. Gallo, S. Ganjour, Jia. Gao, Jie. Gao, V. Garcia Diaz, M. García Pérez, L. García Tabarés, C. Garion, M. V. Garzelli, I. Garzia, S. M. Gascon-Shotkin, G. Gaudio, P. Gay, S.-F. Ge, T. Gehrmann, M. H. Genest, R. Gerard, F. Gerigk, H. Gerwig, P. Giacomelli, S. Giagu, E. Gianfelice-Wendt, F. Gianotti, F. Giffoni, S. S. Gilardoni, M. Gil Costa, M. Giovannetti, M. Giovannozzi, P. Giubellino, G. F. Giudice, A. Giunta, L. K. Gladilin, S. Glukhov, J. Gluza, G. Gobbi, B. Goddard, F. Goertz, T. Golling, D. Gonçalves, V. P. Goncalves, R. Gonçalo, L. A. Gonzalez Gomez, S. Gorgi Zadeh, G. Gorine, E. Gorini, S. A. Gourlay, L. Gouskos, F. Grancagnolo, A. Grassellino, A. Grau, E. Graverini, H. M. Gray, Ma. Greco, Mi. Greco, J.-L. Grenard, O. Grimm, C. Grojean, V. A. Gromov, J. F. Grosse-Oetringhaus, A. Grudiev, K. Grzanka, J. Gu, D. Guadagnoli, V. Guidi, S. Guiducci, G. Guillermo Canton, Y. O. Günaydin, R. Gupta, R. S. Gupta, J. Gutierrez, J. Gutleber, C. Guyot, V. Guzey, C. Gwenlan, Ch. Haberstroh, B. Hacışahinoğlu, B. Haerer, K. Hahn, T. Hahn, A. Hammad, C. Han, M. Hance, A. Hannah, P. C. Harris, C. Hati, S. Haug, J. Hauptman, V. Haurylavets, H-J. He, A. Hegglin, B. Hegner, K. Heinemann, S. Heinemeyer, C. Helsens, Ana. Henriques, And. Henriques, P. Hernandez, R. J. Hernández-Pinto, J. Hernandez-Sanchez, T. Herzig, I. Hiekkanen, W. Hillert, T. Hoehn, M. Hofer, W. Höfle, F. Holdener, S. Holleis, B. Holzer, D. K. Hong, C. G. Honorato, S. C. Hopkins, J. Hrdinka, F. Hug, B. Humann, H. Humer, T. Hurth, A. Hutton, G. Iacobucci, N. Ibarrola, L. Iconomidou-Fayard, K. Ilyina-Brunner, J. Incandela, A. Infantino, V. Ippolito, M. Ishino, R. Islam, H. Ita, A. Ivanovs, S. Iwamoto, A. Iyer, S. Izquierdo Bermudez, S. Jadach, D. O. Jamin, P. Janot, P. Jarry, A. Jeff, P. Jenny, E. Jensen, M. Jensen, X. Jiang, J. M. Jiménez, M. A. Jones, O. R. Jones, J. M. Jowett, S. Jung, W. Kaabi, M. Kado, K. Kahle, L. Kalinovskaya, J. Kalinowski, J. F. Kamenik, K. Kannike, S. O. Kara, H. Karadeniz, V. Karaventzas, I. Karpov, S. Kartal, A. Karyukhin, V. Kashikhin, J. Katharina Behr, U. Kaya, J. Keintzel, P. A. Keinz, K. Keppel, R. Kersevan, K. Kershaw, H. Khanpour, S. Khatibi, M. Khatiri Yanehsari, V. V. Khoze, J. Kieseler, A. Kilic, A. Kilpinen, Y.-K. Kim, D. W. Kim, U. Klein, M. Klein, F. Kling, N. Klinkenberg, S. Klöppel, M. Klute, V. I. Klyukhin, M. Knecht, B. Kniehl, F. Kocak, C. Koeberl, A. M. Kolano, A. Kollegger, K. Kołodziej, A. A. Kolomiets, J. Komppula, I. Koop, P. Koppenburg, M. Koratzinos, M. Kordiaczyńska, M. Korjik, O. Kortner, P. Kostka, W. Kotlarski, C. Kotnig, T. Köttig, A. V. Kotwal, A. D. Kovalenko, S. Kowalski, J. Kozaczuk, G. A. Kozlov, S. S. Kozub, A. M. Krainer, T. Kramer, M. Krämer, M. Krammer, A. A. Krasnov, F. Krauss, K. Kravalis, L. Kretzschmar, R. M. Kriske, H. Kritscher, P. Krkotic, H. Kroha, M. Kucharczyk, S. Kuday, A. Kuendig, G. Kuhlmann, A. Kulesza, Mi. Kumar, Mu. Kumar, A. Kusina, S. Kuttimalai, M. Kuze, T. Kwon, F. Lackner, M. Lackner, E. La Francesca, M. Laine, G. Lamanna, S. La Mendola, E. Lançon, G. Landsberg, P. Langacker, C. Lange, A. Langner, A. J. Lankford, J. P. Lansberg, T. Lari, P. J. Laycock, P. Lebrun, A. Lechner, K. Lee, S. Lee, R. Lee, T. Lefevre, P. Le Guen, T. Lehtinen, S. B. Leith, P. Lenzi, E. Leogrande, C. Leonidopoulos, I. Leon-Monzon, G. Lerner, O. Leroy, T. Lesiak, P. Lévai, A. Leveratto, E. Levichev, G. Li, S. Li, R. Li, D. Liberati, M. Liepe, D. A. Lissauer, Z. Liu, A. Lobko, E. Locci, E. Logothetis Agaliotis, M. P. Lombardo, A. J. Long, C. Lorin, R. Losito, A. Louzguiti, I. Low, D. Lucchesi, M. T. Lucchini, A. Luciani, M. Lueckhof, A. J. G. Lunt, M. Luzum, D. A. Lyubimtsev, M. Maggiora, N. Magnin, M. A. Mahmoud, F. Mahmoudi, J. Maitre, V. Makarenko, A. Malagoli, J. Malclés, L. Malgeri, P. J. Mallon, F. Maltoni, S. Malvezzi, O. B. Malyshev, G. Mancinelli, P. Mandrik, P. Manfrinetti, M. Mangano, P. Manil, M. Mannelli, G. Marchiori, F. Marhauser, V. Mariani, V. Marinozzi, S. Mariotto, P. Marquard, C. Marquet, T. Marriott-Dodington, R. Martin, O. Martin, J. Martin Camalich, T. Martinez, H. Martinez Bruzual, M. I. Martínez-Hernández, D. E. Martins, S. Marzani, D. Marzocca, L. Marzola, S. Masciocchi, I. Masina, A. Massimiliano, A. Massironi, T. Masubuchi, V. A. Matveev, M. A. Mazzoni, M. McCullough, P. A. McIntosh, P. Meade, L. Medina, A. Meier, J. Meignan, B. Mele, J. G. Mendes Saraiva, F. Menez, M. Mentink, E. Meoni, P. Meridiani, M. Merk, P. Mermod, V. Mertens, L. Mether, E. Métral, M. Migliorati, A. Milanese, C. Milardi, G. Milhano, B. L. Militsyn, F. Millet, I. Minashvili, J. V. Minervini, L. S. Miralles, D. Mirarchi, S. Mishima, D. P. Missiaen, G. Mitselmakher, T. Mitsuhashi, J. Mnich, M. Mohammadi Najafabadi, R. N. Mohapatra, N. Mokhov, J. G. Molson, R. Monge, C. Montag, G. Montagna, S. Monteil, G. Montenero, E. Montesinos, F. Moortgat, N. Morange, G. Morello, M. Moreno Llácer, M. Moretti, S. Moretti, A. K. Morley, A. Moros, I. Morozov, V. Morretta, M. Morrone, A. Mostacci, S. Muanza, N. Muchnoi, M. Mühlegger, M. Mulder, M. Mulders, B. Müller, F. Müller, A.-S. Müller, J. Munilla, M. J. Murray, Y. Muttoni, S. Myers, M. Mylona, J. Nachtman, T. Nakamoto, M. Nardecchia, G. Nardini, P. Nason, Z. Nergiz, A. V. Nesterenko, A. Nettsträter, C. Neubüser, J. Neundorf, F. Niccoli, O. Nicrosini, Y. Nie, U. Niedermayer, J. Niedziela, A. Niemi, S. A. Nikitin, A. Nisati, J. M. No, M. Nonis, Y. Nosochkov, M. Novák, A. Novokhatski, J. M. O’Callaghan, C. Ochando, S. Ogur, K. Ohmi, K. Oide, V. A. Okorokov, Y. Okumura, C. Oleari, F. I. Olness, Y. Onel, M. Ortino, J. Osborne, P. Osland, T. Otto, K. Y. Oyulmaz, A. Ozansoy, V. Özcan, K. Özdemir, C. E. Pagliarone, H. F. Pais da Silva, E. Palmieri, L. Palumbo, A. Pampaloni, R.-Q. Pan, M. Panareo, O. Panella, G. Panico, G. Panizzo, A. A. Pankov, V. Pantsyrny, C. G. Papadopoulos, A. Papaefstathiou, Y. Papaphilippou, M. A. Parker, V. Parma, M. Pasquali, S. K. Patra, R. Patterson, H. Paukkunen, F. Pauss, S. Peggs, J.-P. Penttinen, G. Peón, E. E. Perepelkin, E. Perez, J. C. Perez, G. Perez, F. Pérez, E. Perez Codina, J. Perez Morales, M. Perfilov, H. Pernegger, M. Peruzzi, C. Pes, K. Peters, S. Petracca, F. Petriello, L. Pezzotti, S. Pfeiffer, F. Piccinini, T. Pieloni, M. Pierini, H. Pikhartova, G. Pikurs, E. Pilicer, P. Piminov, C. Pira, R. Pittau, W. Płaczek, M. Plagge, T. Plehn, M.-A. Pleier, M. Płoskoń, M. Podeur, H. Podlech, T. Podzorny, L. Poggioli, A. Poiron, G. Polesello, M. Poli Lener, A. Polini, J. Polinski, S. M. Polozov, L. Ponce, M. Pont, L. Pontecorvo, T. Portaluri, K. Potamianos, C. Prasse, M. Prausa, A. Preinerstorfer, E. Premat, T. Price, M. Primavera, F. Prino, M. Prioli, J. Proudfoot, A. Provino, T. Pugnat, N. Pukhaeva, S. Puławski, D. Pulikowski, G. Punzi, M. Putti, A. Pyarelal, H. Quack, M. Quispe, A. Racioppi, H. Rafique, V. Raginel, M. Raidal, N. S. Ramírez-Uribe, M. J. Ramsey-Musolf, R. Rata, P. Ratoff, F. Ravotti, P. Rebello Teles, M. Reboud, S. Redaelli, E. Renner, A. E. Rentería-Olivo, M. Rescigno, J. Reuter, A. Ribon, A. M. Ricci, W. Riegler, S. Riemann, B. Riemann, T. Riemann, J. M. Rifflet, R. A. Rimmer, R. Rinaldesi, L. Rinolfi, O. Rios Rubiras, T. Risselada, A. Rivetti, L. Rivkin, T. Rizzo, T. Robens, F. Robert, A. J. Robson, E. Rochepault, C. Roda, G. Rodrigo, M. Rodríguez-Cahuantzi, C. Rogan, M. Roig, S. Rojas-Torres, J. Rojo, G. Rolandi, G. Rolando, P. Roloff, A. Romanenko, A. Romanov, F. Roncarolo, A. Rosado Sanchez, G. Rosaz, L. Rossi, A. Rossi, R. Rossmanith, B. Rousset, C. Royon, X. Ruan, I. Ruehl, V. Ruhlmann-Kleider, R. Ruiz, L. Rumyantsev, R. Ruprecht, A. I. Ryazanov, A. Saba, R. Sadykov, D. Saez de Jauregui, M. Sahin, B. Sailer, M. Saito, F. Sala, G. P. Salam, J. Salfeld-Nebgen, C. A. Salgado, S. Salini, J. M. Sallese, T. Salmi, A. Salzburger, O. A. Sampayo, S. Sanfilippo, J. Santiago, E. Santopinto, R. Santoro, A. Sanz Ull, X. Sarasola, I. H. Sarpün, M. Sauvain, S. Savelyeva, R. Sawada, G. F. R. Sborlini, A. Schaffer, M. Schaumann, M. Schenk, C. Scheuerlein, I. Schienbein, K. Schlenga, H. Schmickler, R. Schmidt, D. Schoerling, A. Schoning, T. Schörner-Sadenius, M. Schott, D. Schulte, P. Schwaller, C. Schwanenberger, P. Schwemling, N. Schwerg, L. Scibile, A. Sciuto, E. Scomparin, C. Sebastiani, B. Seeber, M. Segreti, P. Selva, M. Selvaggi, C. Senatore, A. Senol, L. Serin, M. Serluca, N. Serra, A. Seryi, L. Sestini, A. Sfyrla, M. Shaposhnikov, E. Shaposhnikova, B. Yu. Sharkov, D. Shatilov, J. Shelton, V. Shiltsev, I. P. Shipsey, G. D. Shirkov, A. Shivaji, D. Shwartz, T. Sian, S. Sidorov, A. Siemko, L. Silvestrini, N. Simand, F. Simon, B. K. Singh, A. Siódmok, Y. Sirois, E. Sirtori, R. Sirvinskaite, B. Sitar, T. Sjöstrand, P. Skands, E. Skordis, K. Skovpen, M. Skrzypek, E. Slade, P. Slavich, R. Slovak, V. Smaluk, V. Smirnov, W. Snoeys, L. Soffi, P. Sollander, O. Solovyanov, H. K. Soltveit, H. Song, P. Sopicki, M. Sorbi, L. Spallino, M. Spannowsky, B. Spataro, P. Sphicas, H. Spiesberger, P. Spiller, M. Spira, T. Srivastava, J. Stachel, A. Stakia, J. L. Stanyard, E. Starchenko, A. Yu. Starikov, A. M. Staśto, M. Statera, R. Steerenberg, J. Steggemann, A. Stenvall, F. Stivanello, D. Stöckinger, L. S. Stoel, M. Stöger-Pollach, B. Strauss, M. Stuart, G. Stupakov, S. Su, A. Sublet, K. Sugita, L. Sulak, M. K. Sullivan, S. Sultansoy, T. Sumida, K. Suzuki, G. Sylva, M. J. Syphers, A. Sznajder, M. Taborelli, N. A. Tahir, E. Tal Hod, M. Takeuchi, C. Tambasco, J. Tanaka, K. Tang, I. Tapan, S. Taroni, G. F. Tartarelli, G. Tassielli, L. Tavian, T. M. Taylor, G. N. Taylor, A. M. Teixeira, G. Tejeda-Muñoz, V. I. Telnov, R. Tenchini, H. H. J. ten Kate, K. Terashi, A. Tesi, M. Testa, C. Tetrel, D. Teytelman, J. Thaler, A. Thamm, S. Thomas, M. T. Tiirakari, V. Tikhomirov, D. Tikhonov, H. Timko, V. Tisserand, L. M. Tkachenko, J. Tkaczuk, J. Ph. Tock, B. Todd, E. Todesco, R. Tomás Garcia, D. Tommasini, G. Tonelli, F. Toral, T. Torims, R. Torre, Z. Townsend, R. Trant, D. Treille, L. Trentadue, A. Tricoli, A. Tricomi, W. Trischuk, I. S. Tropin, B. Tuchming, A. A. Tudora, B. Turbiarz, I. Turk Cakir, M. Turri, T. Tydecks, J. Usovitsch, J. Uythoven, R. Vaglio, A. Valassi, F. Valchkova, M. A. Valdivia Garcia, P. Valente, R. U. Valente, A.-M. Valente-Feliciano, G. Valentino, L. Vale Silva, J. M. Valet, R. Valizadeh, J. W. F. Valle, S. Vallecorsa, G. Vallone, M. van Leeuwen, U. H. van Rienen, L. van Riesen-Haupt, M. Varasteh, L. Vecchi, P. Vedrine, G. Velev, R. Veness, A. Ventura, W. Venturini Delsolaro, M. Verducci, C. B. Verhaaren, C. Vernieri, A. P. Verweij, O. Verwilligen, O. Viazlo, A. Vicini, G. Viehhauser, N. Vignaroli, M. Vignolo, A. Vitrano, I. Vivarelli, S. Vlachos, M. Vogel, D. M. Vogt, V. Völkl, P. Volkov, G. Volpini, J. von Ahnen, G. Vorotnikov, G. G. Voutsinas, V. Vysotsky, U. Wagner, R. Wallny, L.-T. Wang, R. Wang, K. Wang, B. F. L. Ward, T. P. Watson, N. K. Watson, Z. Wa̧s, C. Weiland, S. Weinzierl, C. P. Welsch, J. Wenninger, M. Widorski, U. A. Wiedemann, H.-U. Wienands, G. Wilkinson, P. H. Williams, A. Winter, A. Wohlfahrt, T. Wojtoń, D. Wollmann, J. Womersley, D. Woog, X. Wu, A. Wulzer, M. K. Yanehsari, G. Yang, H. J. Yang, W.-M. Yao, E. Yazgan, V. Yermolchik, Ay. Yilmaz, Al. Yilmaz, H.-D. Yoo, S. A. Yost, T. You, C. Young, T.-T. Yu, F. Yu, A. Zaborowska, S. G. Zadeh, M. Zahnd, M. Zanetti, L. Zanotto, L. Zawiejski, P. Zeiler, M. Zerlauth, S. M. Zernov, G. Zevi Dell Porta, Z. Zhang, Y. Zhang, C. Zhang, H. Zhang, Z. Zhao, Y.-M. Zhong, J. Zhou, D. Zhou, P. Zhuang, G. Zick, F. Zimmermann, J. Zinn-Justin, L. Zivkovic, A. V. Zlobin, M. Zobov, J. Zupan, J. Zurita, and The FCC Collaboration

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract We review the physics opportunities of the Future Circular Collider, covering its e+e-, pp, ep and heavy ion programmes. We describe the measurement capabilities of each FCC component, addressing the study of electroweak, Higgs and strong interactions, the top quark and flavour, as well as phenomena beyond the Standard Model. We highlight the synergy and complementarity of the different colliders, which will contribute to a uniquely coherent and ambitious research programme, providing an unmatchable combination of precision and sensitivity to new physics.

Published
2019
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9. Uncertainties in the lightest $$CP$$ CP even Higgs boson mass prediction in the minimal supersymmetric standard model: fixed order versus effective field theory prediction

Author

B. C. Allanach and A. Voigt

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract We quantify and examine the uncertainties in predictions of the lightest $$CP$$ CP even Higgs boson pole mass $$M_h$$ Mh in the Minimal Supersymmetric Standard Model ($${\text {MSSM}}$$ MSSM ), utilising current spectrum generators and including some three-loop corrections. There are two broadly different approximations being used: effective field theory (EFT) where an effective Standard Model ($$\text {SM}$$ SM ) is used below a supersymmetric mass scale, and a fixed order calculation, where the $${\text {MSSM}}$$ MSSM is matched to $$\text {QCD}\times \text {QED}$$ QCD×QED at the electroweak scale. The uncertainties on the $$M_h$$ Mh prediction in each approach are broken down into logarithmic and finite pieces. The inferred values of the stop mass parameters are sensitively dependent upon the precision of the prediction for $$M_h$$ Mh . The fixed order calculation appears to be more accurate below a supersymmetry (SUSY) mass scale of $$M_S\approx 1.2~\text {TeV}$$ MS≈1.2TeV , whereas above this scale, the EFT calculation is more accurate. We also revisit the range of the lightest stop mass across fine-tuned parameter space that has an appropriate stable vacuum and is compatible with the lightest $$CP$$ CP even Higgs boson h being identified with the one discovered at the ATLAS and CMS experiments in 2012; we achieve a maximum value of $$\sim 10^{11}$$ ∼1011 GeV.

Published
2018
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11. Dissecting multi-photon resonances at the large hadron collider

Author

B. C. Allanach, D. Bhatia, and Abhishek M. Iyer

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract We examine the phenomenology of the production, at the 13 TeV Large Hadron Collider (LHC), of a heavy resonance X, which decays via other new on-shell particles n into multi-(i.e. three or more) photon final states. In the limit that n has a much smaller mass than X, the multi-photon final state may dominantly appear as a two-photon final state because the $$\gamma $$ γ s from the n decay are highly collinear and remain unresolved. We discuss how to discriminate this scenario from $$X \rightarrow \gamma \gamma $$ X → γ γ : rather than discarding non-isolated photons, it is better to relax the isolation criteria and instead form photon jets substructure variables. The spins of X and n leave their imprint upon the distribution of pseudo-rapidity gap $$\Delta \eta $$ Δ η between the apparent two-photon states. Depending on the total integrated luminosity, this can be used in many cases to claim discrimination between the possible spin choices of X and n, although the case where X and n are both scalar particles cannot be discriminated from the direct $$X \rightarrow \gamma \gamma $$ X → γ γ decay in this manner. Information on the mass of n can be gained by considering the mass of each photon jet.

Published
2017
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