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European Physical Journal. C, Particles and Fields

Habib Abedi, Salvatore Capozziello
Teleparallel theory of gravity and its modifications have been studied extensively in literature. However, gravitational waves has not been studied enough in the framework of teleparallelism. In the present study, we discuss gravitational waves in general theories of teleparallel gravity containing the torsion scalar T , the boundary term B and a scalar field <mml:math xmlns:mml=""> <mml:mi>ϕ</mml:mi> </mml:math> . The goal is to classify possible new polarizations generalizing results presented in Bamba et al...
2018: European Physical Journal. C, Particles and Fields
Salvatore Capozziello, Konstantinos F Dialektopoulos, Sergey V Sushkov
Adopting Noether point symmetries, we classify and integrate dynamical systems coming from Horndeski cosmologies. The method is particularly effective both to select the form of Horndeski models and to derive exact cosmological solutions. Starting from the Lagrangians selected by the Noether symmetries, it is possible to derive several modified theories of gravity like f ( R ) gravity, Brans-Dicke gravity, string inspired gravity and so on. In any case, exact solutions are found out.
2018: European Physical Journal. C, Particles and Fields
Mariam Bouhmadi-López, Ahmed Errahmani, Taoufik Ouali, Yaser Tavakoli
The background cosmological dynamics of the late Universe is analysed on the framework of a dark energy model described by an holographic Ricci dark energy component. Several kind of interactions between the dark energy and the dark matter components are considered herein. We solve the background cosmological dynamics for the different choices of interactions with the aim to analyse not only the current evolution of the universe but also its asymptotic behaviour and, in particular, possible future singularities removal...
2018: European Physical Journal. C, Particles and Fields
H Shi, E Milotti, S Bartalucci, M Bazzi, S Bertolucci, A M Bragadireanu, M Cargnelli, A Clozza, L De Paolis, S Di Matteo, J-P Egger, H Elnaggar, C Guaraldo, M Iliescu, M Laubenstein, J Marton, M Miliucci, A Pichler, D Pietreanu, K Piscicchia, A Scordo, D L Sirghi, F Sirghi, L Sperandio, O Vazquez Doce, E Widmann, J Zmeskal, C Curceanu
The VIolation of Pauli exclusion principle -2 experiment, or VIP-2 experiment, at the Laboratori Nazionali del Gran Sasso searches for X-rays from copper atomic transitions that are prohibited by the Pauli exclusion principle. Candidate direct violation events come from the transition of a 2 p electron to the ground state that is already occupied by two electrons. From the first data taking campaign in 2016 of VIP-2 experiment, we determined a best upper limit of [Formula: see text] for the probability that such a violation exists...
2018: European Physical Journal. C, Particles and Fields
Wolfgang Lucha, Dmitri Melikhov, Silvano Simula
We discuss the leptonic decay constants of heavy-light mesons by means of Borel QCD sum rules in the local-duality (LD) limit of infinitely large Borel mass parameter. In this limit, for an appropriate choice of the invariant structures in the QCD correlation functions, all vacuum-condensate contributions vanish and all nonperturbative effects are contained in only one quantity, the effective threshold. We study properties of the LD effective thresholds in the limits of large heavy-quark mass [Formula: see text] and small light-quark mass [Formula: see text]...
2018: European Physical Journal. C, Particles and Fields
Ciprian A Sporea, Andrzej Borowiec, Aneta Wojnar
We propose a new formula to explain circular velocity profiles of spiral galaxies obtained from the Starobinsky model in the Palatini formalism. It is based on the assumption that the gravity can be described by two conformally related metrics: one of them is responsible for the measurement of distances, while the other, the so-called dark metric, is responsible for a geodesic equation and therefore can be used for the description of the velocity profile. The formula is tested against a subset of galaxies taken from the HI Nearby Galaxy Survey (THINGS)...
2018: European Physical Journal. C, Particles and Fields
João Morais, Mariam Bouhmadi-López, Manuel Krämer, Salvador Robles-Pérez
We analyze a quantized toy model of a universe undergoing eternal inflation using a quantum-field-theoretical formulation of the Wheeler-DeWitt equation. This so-called third quantization method leads to the picture that the eternally inflating universe is converted to a multiverse in which sub-universes are created and exhibit a distinctive phase in their evolution before reaching an asymptotic de Sitter phase. From the perspective of one of these sub-universes, we can thus analyze the pre-inflationary phase that arises naturally...
2018: European Physical Journal. C, Particles and Fields
Imanol Albarran, Mariam Bouhmadi-López, João Morais
The current acceleration of the Universe is one of the most puzzling issues in theoretical physics nowadays. We are far from giving an answer in this letter to the question of its nature. Yet, with the observations we have at hand, we analyse the different patterns that the gravitational potential can show in the future. Surprisingly, gravity not only can get weaker in the near future, it can even become repulsive; or equivalently, the gravitational potential may become negative. We show this remark by using one of the simplest phenomenological model we can imagine for dark energy...
2018: European Physical Journal. C, Particles and Fields
Christian G Böhmer, Piyabut Burikham, Tiberiu Harko, Matthew J Lake
We derive upper and lower limits for the mass-radius ratio of spin-fluid spheres in Einstein-Cartan theory, with matter satisfying a linear barotropic equation of state, and in the presence of a cosmological constant. Adopting a spherically symmetric interior geometry, we obtain the generalized continuity and Tolman-Oppenheimer-Volkoff equations for a Weyssenhoff spin fluid in hydrostatic equilibrium, expressed in terms of the effective mass, density and pressure, all of which contain additional contributions from the spin...
2018: European Physical Journal. C, Particles and Fields
Ruth Lazkoz, María Ortiz-Baños, Vincenzo Salzano
It is a very well established matter nowadays that many modified gravity models can offer a sound alternative to General Relativity for the description of the accelerated expansion of the universe. But it is also equally well known that no clear and sharp discrimination between any alternative theory and the classical one has been found so far. In this work, we attempt at formulating a different approach starting from the general class of f ( R ) theories as test probes: we try to reformulate f ( R ) Lagrangian terms as explicit functions of the redshift, i...
2018: European Physical Journal. C, Particles and Fields
J Nieves, R Pavao, L Tolos
We have reviewed the renormalization procedure used in the unitarized coupled-channel model of Romanets et al. (Phys Rev D 85:114032, 2012), and its impact in the [Formula: see text], [Formula: see text], and [Formula: see text] sector, where five [Formula: see text] states have been recently observed by the LHCb Collaboration. The meson-baryon interactions used in the model are consistent with both chiral and heavy-quark spin symmetries, and lead to a successful description of the observed lowest-lying odd parity resonances [Formula: see text] and [Formula: see text], and [Formula: see text] and [Formula: see text] resonances...
2018: European Physical Journal. C, Particles and Fields
M Hentschinski, A Kusina, K Kutak, M Serino
We calculate the transverse momentum dependent gluon-to-gluon splitting function within [Formula: see text]-factorization, generalizing the framework employed in the calculation of the quark splitting functions in Hautmann et al. (Nucl Phys B 865:54-66, arXiv:1205.1759, 2012), Gituliar et al. (JHEP 01:181, arXiv:1511.08439, 2016), Hentschinski et al. (Phys Rev D 94(11):114013, arXiv:1607.01507, 2016) and demonstrate at the same time the consistency of the extended formalism with previous results. While existing versions of [Formula: see text] factorized evolution equations contain already a gluon-to-gluon splitting function i...
2018: European Physical Journal. C, Particles and Fields
Marcin Bury, Andreas van Hameren, Hannes Jung, Krzysztof Kutak, Sebastian Sapeta, Mirko Serino
A new calculation using off-shell matrix elements with TMD parton densities supplemented with a newly developed initial state TMD parton shower is described. The calculation is based on the KaTie package for an automated calculation of the partonic process in high-energy factorization, making use of TMD parton densities implemented in TMDlib. The partonic events are stored in an LHE file, similar to the conventional LHE files, but now containing the transverse momenta of the initial partons. The LHE files are read in by the Cascade package for the full TMD parton shower, final state shower and hadronization from Pythia where events in HEPMC format are produced...
2018: European Physical Journal. C, Particles and Fields
Reuven Balkin, Gilad Perez, Andreas Weiler
We examine the dark matter phenomenology of a composite electroweak singlet state. This singlet belongs to the Goldstone sector of a well-motivated extension of the Littlest Higgs with T -parity. A viable parameter space, consistent with the observed dark matter relic abundance as well as with the various collider, electroweak precision and dark matter direct detection experimental constraints is found for this scenario. T -parity implies a rich LHC phenomenology, which forms an interesting interplay between conventional natural SUSY type of signals involving third generation quarks and missing energy, from stop-like particle production and decay, and composite Higgs type of signals involving third generation quarks associated with Higgs and electroweak gauge boson, from vector-like top-partners production and decay...
2018: European Physical Journal. C, Particles and Fields
Sergey Ostapchenko, Marcus Bleicher
We apply the phenomenological Reggeon field theory framework to investigate rapidity gap survival (RGS) probability for diffractive dijet production in proton-proton collisions. In particular, we study in some detail rapidity gap suppression due to elastic rescatterings of intermediate partons in the underlying parton cascades, described by enhanced (Pomeron-Pomeron interaction) diagrams. We demonstrate that such contributions play a subdominant role, compared to the usual, so-called "eikonal", rapidity gap suppression due to elastic rescatterings of constituent partons of the colliding protons...
2018: European Physical Journal. C, Particles and Fields
Che-Yu Chen, Mariam Bouhmadi-López, Pisin Chen
The vacuum, static, and spherically symmetric solutions in the mimetic Born-Infeld gravity are studied. The mimetic Born-Infeld gravity is a reformulation of the Eddington-inspired-Born-Infeld (EiBI) model under the mimetic approach. Due to the mimetic field, the theory contains non-trivial vacuum solutions different from those in Einstein gravity. We find that with the existence of the mimetic field, the spacelike singularity inside a Schwarzschild black hole could be altered to a lightlike singularity, even though the curvature invariants still diverge at the singularity...
2018: European Physical Journal. C, Particles and Fields
Ruth Lazkoz, Iker Leanizbarrutia, Vincenzo Salzano
The cosmological redshift drift could lead to the next step in high-precision cosmic geometric observations, becoming a direct and irrefutable test for cosmic acceleration. In order to test the viability and possible properties of this effect, also called Sandage-Loeb (SL) test, we generate a model-independent mock data set in order to compare its constraining power with that of the future mock data sets of Type Ia Supernovae (SNe) and Baryon Acoustic Oscillations (BAO). The performance of those data sets is analyzed by testing several cosmological models with the Markov chain Monte Carlo (MCMC) method, both independently as well as combining all data sets...
2018: European Physical Journal. C, Particles and Fields
D Adamová, M M Aggarwal, G Aglieri Rinella, M Agnello, N Agrawal, Z Ahammed, S Ahmad, S U Ahn, S Aiola, A Akindinov, S N Alam, D S D Albuquerque, D Aleksandrov, B Alessandro, D Alexandre, R Alfaro Molina, A Alici, A Alkin, J Alme, T Alt, S Altinpinar, I Altsybeev, C Alves Garcia Prado, M An, C Andrei, H A Andrews, A Andronic, V Anguelov, C Anson, T Antičić, F Antinori, P Antonioli, R Anwar, L Aphecetche, H Appelshäuser, S Arcelli, R Arnaldi, O W Arnold, I C Arsene, M Arslandok, B Audurier, A Augustinus, R Averbeck, M D Azmi, A Badalà, Y W Baek, S Bagnasco, R Bailhache, R Bala, A Baldisseri, M Ball, R C Baral, A M Barbano, R Barbera, F Barile, L Barioglio, G G Barnaföldi, L S Barnby, V Barret, P Bartalini, K Barth, J Bartke, E Bartsch, M Basile, N Bastid, S Basu, B Bathen, G Batigne, A Batista Camejo, B Batyunya, P C Batzing, I G Bearden, H Beck, C Bedda, N K Behera, I Belikov, F Bellini, H Bello Martinez, R Bellwied, L G E Beltran, V Belyaev, G Bencedi, S Beole, A Bercuci, Y Berdnikov, D Berenyi, R A Bertens, D Berzano, L Betev, A Bhasin, I R Bhat, A K Bhati, B Bhattacharjee, J Bhom, L Bianchi, N Bianchi, C Bianchin, J Bielčík, J Bielčíková, A Bilandzic, G Biro, R Biswas, S Biswas, J T Blair, D Blau, C Blume, G Boca, F Bock, A Bogdanov, L Boldizsár, M Bombara, G Bonomi, M Bonora, J Book, H Borel, A Borissov, M Borri, E Botta, C Bourjau, P Braun-Munzinger, M Bregant, T A Broker, T A Browning, M Broz, E J Brucken, E Bruna, G E Bruno, D Budnikov, H Buesching, S Bufalino, P Buhler, S A I Buitron, P Buncic, O Busch, Z Buthelezi, J B Butt, J T Buxton, J Cabala, D Caffarri, H Caines, A Caliva, E Calvo Villar, P Camerini, A A Capon, F Carena, W Carena, F Carnesecchi, J Castillo Castellanos, A J Castro, E A R Casula, C Ceballos Sanchez, P Cerello, B Chang, S Chapeland, M Chartier, J L Charvet, S Chattopadhyay, S Chattopadhyay, A Chauvin, M Cherney, C Cheshkov, B Cheynis, V Chibante Barroso, D D Chinellato, S Cho, P Chochula, K Choi, M Chojnacki, S Choudhury, P Christakoglou, C H Christensen, P Christiansen, T Chujo, S U Chung, C Cicalo, L Cifarelli, F Cindolo, J Cleymans, F Colamaria, D Colella, A Collu, M Colocci, G Conesa Balbastre, Z Conesa Del Valle, M E Connors, J G Contreras, T M Cormier, Y Corrales Morales, I Cortés Maldonado, P Cortese, M R Cosentino, F Costa, S Costanza, J Crkovská, P Crochet, E Cuautle, L Cunqueiro, T Dahms, A Dainese, M C Danisch, A Danu, D Das, I Das, S Das, A Dash, S Dash, S De, A De Caro, G de Cataldo, C de Conti, J de Cuveland, A De Falco, D De Gruttola, N De Marco, S De Pasquale, R D De Souza, H F Degenhardt, A Deisting, A Deloff, C Deplano, P Dhankher, D Di Bari, A Di Mauro, P Di Nezza, B Di Ruzza, M A Diaz Corchero, T Dietel, P Dillenseger, R Divià, Ø Djuvsland, A Dobrin, D Domenicis Gimenez, B Dönigus, O Dordic, T Drozhzhova, A K Dubey, A Dubla, L Ducroux, A K Duggal, P Dupieux, R J Ehlers, D Elia, E Endress, H Engel, E Epple, B Erazmus, F Erhardt, B Espagnon, S Esumi, G Eulisse, J Eum, D Evans, S Evdokimov, L Fabbietti, D Fabris, J Faivre, A Fantoni, M Fasel, L Feldkamp, A Feliciello, G Feofilov, J Ferencei, A Fernández Téllez, E G Ferreiro, A Ferretti, A Festanti, V J G Feuillard, J Figiel, M A S Figueredo, S Filchagin, D Finogeev, F M Fionda, E M Fiore, M Floris, S Foertsch, P Foka, S Fokin, E Fragiacomo, A Francescon, A Francisco, U Frankenfeld, G G Fronze, U Fuchs, C Furget, A Furs, M Fusco Girard, J J Gaardhøje, M Gagliardi, A M Gago, K Gajdosova, M Gallio, C D Galvan, D R Gangadharan, P Ganoti, C Gao, C Garabatos, E Garcia-Solis, K Garg, P Garg, C Gargiulo, P Gasik, E F Gauger, M B Gay Ducati, M Germain, P Ghosh, S K Ghosh, P Gianotti, P Giubellino, P Giubilato, E Gladysz-Dziadus, P Glässel, D M Goméz Coral, A Gomez Ramirez, A S Gonzalez, V Gonzalez, P González-Zamora, S Gorbunov, L Görlich, S Gotovac, V Grabski, L K Graczykowski, K L Graham, L Greiner, A Grelli, C Grigoras, V Grigoriev, A Grigoryan, S Grigoryan, N Grion, J M Gronefeld, F Grosa, J F Grosse-Oetringhaus, R Grosso, L Gruber, F R Grull, F Guber, R Guernane, B Guerzoni, K Gulbrandsen, T Gunji, A Gupta, R Gupta, I B Guzman, R Haake, C Hadjidakis, H Hamagaki, G Hamar, J C Hamon, J W Harris, A Harton, D Hatzifotiadou, S Hayashi, S T Heckel, E Hellbär, H Helstrup, A Herghelegiu, G Herrera Corral, F Herrmann, B A Hess, K F Hetland, H Hillemanns, B Hippolyte, J Hladky, D Horak, R Hosokawa, P Hristov, C Hughes, T J Humanic, N Hussain, T Hussain, D Hutter, D S Hwang, R Ilkaev, M Inaba, M Ippolitov, M Irfan, V Isakov, M S Islam, M Ivanov, V Ivanov, V Izucheev, B Jacak, N Jacazio, P M Jacobs, M B Jadhav, S Jadlovska, J Jadlovsky, C Jahnke, M J Jakubowska, M A Janik, P H S Y Jayarathna, C Jena, S Jena, M Jercic, R T Jimenez Bustamante, P G Jones, A Jusko, P Kalinak, A Kalweit, J H Kang, V Kaplin, S Kar, A Karasu Uysal, O Karavichev, T Karavicheva, L Karayan, E Karpechev, U Kebschull, R Keidel, D L D Keijdener, M Keil, B Ketzer, M Mohisin Khan, P Khan, S A Khan, A Khanzadeev, Y Kharlov, A Khatun, A Khuntia, M M Kielbowicz, B Kileng, D W Kim, D J Kim, D Kim, H Kim, J S Kim, J Kim, M Kim, M Kim, S Kim, T Kim, S Kirsch, I Kisel, S Kiselev, A Kisiel, G Kiss, J L Klay, C Klein, J Klein, C Klein-Bösing, S Klewin, A Kluge, M L Knichel, A G Knospe, C Kobdaj, M Kofarago, T Kollegger, A Kolojvari, V Kondratiev, N Kondratyeva, E Kondratyuk, A Konevskikh, M Kopcik, M Kour, C Kouzinopoulos, O Kovalenko, V Kovalenko, M Kowalski, G Koyithatta Meethaleveedu, I Králik, A Kravčáková, M Krivda, F Krizek, E Kryshen, M Krzewicki, A M Kubera, V Kučera, C Kuhn, P G Kuijer, A Kumar, J Kumar, L Kumar, S Kumar, S Kundu, P Kurashvili, A Kurepin, A B Kurepin, A Kuryakin, S Kushpil, M J Kweon, Y Kwon, S L La Pointe, P La Rocca, C Lagana Fernandes, I Lakomov, R Langoy, K Lapidus, C Lara, A Lardeux, A Lattuca, E Laudi, R Lavicka, L Lazaridis, R Lea, L Leardini, S Lee, F Lehas, S Lehner, J Lehrbach, R C Lemmon, V Lenti, E Leogrande, I León Monzón, P Lévai, S Li, X Li, J Lien, R Lietava, S Lindal, V Lindenstruth, C Lippmann, M A Lisa, V Litichevskyi, H M Ljunggren, W J Llope, D F Lodato, P I Loenne, V Loginov, C Loizides, P Loncar, X Lopez, E López Torres, A Lowe, P Luettig, M Lunardon, G Luparello, M Lupi, T H Lutz, A Maevskaya, M Mager, S Mahajan, S M Mahmood, A Maire, R D Majka, M Malaev, I Maldonado Cervantes, L Malinina, D Mal'Kevich, P Malzacher, A Mamonov, V Manko, F Manso, V Manzari, Y Mao, M Marchisone, J Mareš, G V Margagliotti, A Margotti, J Margutti, A Marín, C Markert, M Marquard, N A Martin, P Martinengo, J A L Martinez, M I Martínez, G Martínez García, M Martinez Pedreira, A Mas, S Masciocchi, M Masera, A Masoni, A Mastroserio, A M Mathis, A Matyja, C Mayer, J Mazer, M Mazzilli, M A Mazzoni, F Meddi, Y Melikyan, A Menchaca-Rocha, E Meninno, J Mercado Pérez, M Meres, S Mhlanga, Y Miake, M M Mieskolainen, D Mihaylov, K Mikhaylov, L Milano, J Milosevic, A Mischke, A N Mishra, D Miśkowiec, J Mitra, C M Mitu, N Mohammadi, B Mohanty, E Montes, D A Moreira De Godoy, L A P Moreno, S Moretto, A Morreale, A Morsch, V Muccifora, E Mudnic, D Mühlheim, S Muhuri, M Mukherjee, J D Mulligan, M G Munhoz, K Münning, R H Munzer, H Murakami, S Murray, L Musa, J Musinsky, C J Myers, B Naik, R Nair, B K Nandi, R Nania, E Nappi, M U Naru, H Natal da Luz, C Nattrass, S R Navarro, K Nayak, R Nayak, T K Nayak, S Nazarenko, A Nedosekin, R A Negrao De Oliveira, L Nellen, S V Nesbo, F Ng, M Nicassio, M Niculescu, J Niedziela, B S Nielsen, S Nikolaev, S Nikulin, V Nikulin, F Noferini, P Nomokonov, G Nooren, J C C Noris, J Norman, A Nyanin, J Nystrand, H Oeschler, S Oh, A Ohlson, T Okubo, L Olah, J Oleniacz, A C Oliveira Da Silva, M H Oliver, J Onderwaater, C Oppedisano, R Orava, M Oravec, A Ortiz Velasquez, A Oskarsson, J Otwinowski, K Oyama, M Ozdemir, Y Pachmayer, V Pacik, D Pagano, P Pagano, G Paić, S K Pal, P Palni, J Pan, A K Pandey, S Panebianco, V Papikyan, G S Pappalardo, P Pareek, J Park, W J Park, S Parmar, A Passfeld, S P Pathak, V Paticchio, R N Patra, B Paul, H Pei, T Peitzmann, X Peng, L G Pereira, H Pereira Da Costa, D Peresunko, E Perez Lezama, V Peskov, Y Pestov, V Petráček, V Petrov, M Petrovici, C Petta, R P Pezzi, S Piano, M Pikna, P Pillot, L O D L Pimentel, O Pinazza, L Pinsky, D B Piyarathna, M Płoskoń, M Planinic, J Pluta, S Pochybova, P L M Podesta-Lerma, M G Poghosyan, B Polichtchouk, N Poljak, W Poonsawat, A Pop, H Poppenborg, S Porteboeuf-Houssais, J Porter, J Pospisil, V Pozdniakov, S K Prasad, R Preghenella, F Prino, C A Pruneau, I Pshenichnov, M Puccio, G Puddu, P Pujahari, V Punin, J Putschke, H Qvigstad, A Rachevski, S Raha, S Rajput, J Rak, A Rakotozafindrabe, L Ramello, F Rami, D B Rana, R Raniwala, S Raniwala, S S Räsänen, B T Rascanu, D Rathee, V Ratza, I Ravasenga, K F Read, K Redlich, A Rehman, P Reichelt, F Reidt, X Ren, R Renfordt, A R Reolon, A Reshetin, K Reygers, V Riabov, R A Ricci, T Richert, M Richter, P Riedler, W Riegler, F Riggi, C Ristea, M Rodríguez Cahuantzi, K Røed, E Rogochaya, D Rohr, D Röhrich, P S Rokita, F Ronchetti, L Ronflette, P Rosnet, A Rossi, A Rotondi, F Roukoutakis, A Roy, C Roy, P Roy, A J Rubio Montero, R Rui, R Russo, A Rustamov, E Ryabinkin, Y Ryabov, A Rybicki, S Saarinen, S Sadhu, S Sadovsky, K Šafařík, S K Saha, B Sahlmuller, B Sahoo, P Sahoo, R Sahoo, S Sahoo, P K Sahu, J Saini, S Sakai, M A Saleh, J Salzwedel, S Sambyal, V Samsonov, A Sandoval, D Sarkar, N Sarkar, P Sarma, M H P Sas, E Scapparone, F Scarlassara, R P Scharenberg, H S Scheid, C Schiaua, R Schicker, C Schmidt, H R Schmidt, M O Schmidt, M Schmidt, J Schukraft, Y Schutz, K Schwarz, K Schweda, G Scioli, E Scomparin, R Scott, M Šefčík, J E Seger, Y Sekiguchi, D Sekihata, I Selyuzhenkov, K Senosi, S Senyukov, E Serradilla, P Sett, A Sevcenco, A Shabanov, A Shabetai, O Shadura, R Shahoyan, A Shangaraev, A Sharma, A Sharma, M Sharma, M Sharma, N Sharma, A I Sheikh, K Shigaki, Q Shou, K Shtejer, Y Sibiriak, S Siddhanta, K M Sielewicz, T Siemiarczuk, D Silvermyr, C Silvestre, G Simatovic, G Simonetti, R Singaraju, R Singh, V Singhal, T Sinha, B Sitar, M Sitta, T B Skaali, M Slupecki, N Smirnov, R J M Snellings, T W Snellman, J Song, M Song, F Soramel, S Sorensen, F Sozzi, E Spiriti, I Sputowska, B K Srivastava, J Stachel, I Stan, P Stankus, E Stenlund, J H Stiller, D Stocco, P Strmen, A A P Suaide, T Sugitate, C Suire, M Suleymanov, M Suljic, R Sultanov, M Šumbera, S Sumowidagdo, K Suzuki, S Swain, A Szabo, I Szarka, A Szczepankiewicz, M Szymanski, U Tabassam, J Takahashi, G J Tambave, N Tanaka, M Tarhini, M Tariq, M G Tarzila, A Tauro, G Tejeda Muñoz, A Telesca, K Terasaki, C Terrevoli, B Teyssier, D Thakur, S Thakur, D Thomas, R Tieulent, A Tikhonov, A R Timmins, A Toia, S Tripathy, S Trogolo, G Trombetta, V Trubnikov, W H Trzaska, B A Trzeciak, T Tsuji, A Tumkin, R Turrisi, T S Tveter, K Ullaland, E N Umaka, A Uras, G L Usai, A Utrobicic, M Vala, J Van Der Maarel, J W Van Hoorne, M van Leeuwen, T Vanat, P Vande Vyvre, D Varga, A Vargas, M Vargyas, R Varma, M Vasileiou, A Vasiliev, A Vauthier, O Vázquez Doce, V Vechernin, A M Veen, A Velure, E Vercellin, S Vergara Limón, R Vernet, R Vértesi, L Vickovic, S Vigolo, J Viinikainen, Z Vilakazi, O Villalobos Baillie, A Villatoro Tello, A Vinogradov, L Vinogradov, T Virgili, V Vislavicius, A Vodopyanov, M A Völkl, K Voloshin, S A Voloshin, G Volpe, B von Haller, I Vorobyev, D Voscek, D Vranic, J Vrláková, B Wagner, J Wagner, H Wang, M Wang, D Watanabe, Y Watanabe, M Weber, S G Weber, D F Weiser, J P Wessels, U Westerhoff, A M Whitehead, J Wiechula, J Wikne, G Wilk, J Wilkinson, G A Willems, M C S Williams, B Windelband, W E Witt, S Yalcin, P Yang, S Yano, Z Yin, H Yokoyama, I-K Yoo, J H Yoon, V Yurchenko, V Zaccolo, A Zaman, C Zampolli, H J C Zanoli, S Zaporozhets, N Zardoshti, A Zarochentsev, P Závada, N Zaviyalov, H Zbroszczyk, M Zhalov, H Zhang, X Zhang, Y Zhang, C Zhang, Z Zhang, C Zhao, N Zhigareva, D Zhou, Y Zhou, Z Zhou, H Zhu, J Zhu, X Zhu, A Zichichi, A Zimmermann, M B Zimmermann, S Zimmermann, G Zinovjev, J Zmeskal
The transverse momentum distributions of the strange and double-strange hyperon resonances ([Formula: see text], [Formula: see text]) produced in p-Pb collisions at [Formula: see text] TeV were measured in the rapidity range [Formula: see text] for event classes corresponding to different charged-particle multiplicity densities, [Formula: see text]d[Formula: see text]/d[Formula: see text]. The mean transverse momentum values are presented as a function of [Formula: see text]d[Formula: see text]/d[Formula: see text], as well as a function of the particle masses and compared with previous results on hyperon production...
2017: European Physical Journal. C, Particles and Fields
Wolfgang Lucha, Dmitri Melikhov, Hagop Sazdjian
Considering four-point correlation functions of color-singlet quark bilinears, we investigate, in the large-[Formula: see text] limit of QCD, the subleading diagrams that involve, in the s -channel of meson-meson scattering amplitudes, two-quark-two-antiquark intermediate states. The latter contribute, together with gluon exchanges, to the formation, at the hadronic level, of two-meson and tetraquark intermediate states. It is shown that the two-meson contributions, which are predictable, in general, from leading-order [Formula: see text]-behaviors, consistently satisfy the constraints resulting from the [Formula: see text] expansion procedure and thus provide a firm basis for the extraction of tetraquark properties from [Formula: see text]-subleading diagrams...
2017: European Physical Journal. C, Particles and Fields
Zhi-Tian Zou, Ying Li, Xin Liu
In this work, we attempt to study the Cabibbo-Kobayashi-Maskawa-favored [Formula: see text] (" S " denoting the scalar meson) decays within the perturbative QCD approach at the leading order and the leading power. Although the light scalar mesons are widely perceived as primarily the four-quark bound states, in practice it is hard for us to make quantitative predictions based on the four-quark picture for light scalars. Hence, we calculate the decays with light scalars in the two-quark model. For the decays with scalar mesons above 1 GeV, we have explored two possible scenarios, depending on whether the light scalars are treated as the lowest lying [Formula: see text] states or four-quark particles...
2017: European Physical Journal. C, Particles and Fields
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