نتایج جستجو برای: photon collision

تعداد نتایج: 116904  

2002
A. A. Natale

We discuss the production of hadronic resonances in very peripheral heavy ion collisions, where the ions collide with impact parameter larger than twice the nuclear radius and remain intact after the collision. We compare the resonance production through two-photon and double Pomeron exchange, showing that when we impose the condition for a peripheral interaction the process dominates over the ...

Journal: :Physical review letters 2016
M Aaboud G Aad B Abbott J Abdallah O Abdinov B Abeloos R Aben O S AbouZeid N L Abraham H Abramowicz H Abreu R Abreu Y Abulaiti B S Acharya L Adamczyk D L Adams J Adelman S Adomeit T Adye A A Affolder T Agatonovic-Jovin J Agricola J A Aguilar-Saavedra S P Ahlen F Ahmadov G Aielli H Akerstedt T P A Åkesson A V Akimov G L Alberghi J Albert S Albrand M J Alconada Verzini M Aleksa I N Aleksandrov C Alexa G Alexander T Alexopoulos M Alhroob B Ali M Aliev G Alimonti J Alison S P Alkire B M M Allbrooke B W Allen P P Allport A Aloisio A Alonso F Alonso C Alpigiani M Alstaty B Alvarez Gonzalez D Álvarez Piqueras M G Alviggi B T Amadio K Amako Y Amaral Coutinho C Amelung D Amidei S P Amor Dos Santos A Amorim S Amoroso G Amundsen C Anastopoulos L S Ancu N Andari T Andeen C F Anders G Anders J K Anders K J Anderson A Andreazza V Andrei S Angelidakis I Angelozzi P Anger A Angerami F Anghinolfi A V Anisenkov N Anjos A Annovi C Antel M Antonelli A Antonov F Anulli M Aoki L Aperio Bella G Arabidze Y Arai J P Araque A T H Arce F A Arduh J-F Arguin S Argyropoulos M Arik A J Armbruster L J Armitage O Arnaez H Arnold M Arratia O Arslan A Artamonov G Artoni S Artz S Asai N Asbah A Ashkenazi B Åsman L Asquith K Assamagan R Astalos M Atkinson N B Atlay K Augsten G Avolio B Axen M K Ayoub G Azuelos M A Baak A E Baas M J Baca H Bachacou K Bachas M Backes M Backhaus P Bagiacchi P Bagnaia Y Bai J T Baines O K Baker E M Baldin P Balek T Balestri F Balli W K Balunas E Banas Sw Banerjee A A E Bannoura L Barak E L Barberio D Barberis M Barbero T Barillari M-S Barisits T Barklow N Barlow S L Barnes B M Barnett R M Barnett Z Barnovska A Baroncelli G Barone A J Barr L Barranco Navarro F Barreiro J Barreiro Guimarães da Costa R Bartoldus A E Barton P Bartos A Basalaev A Bassalat R L Bates S J Batista J R Batley M Battaglia M Bauce F Bauer H S Bawa J B Beacham M D Beattie T Beau P H Beauchemin P Bechtle H P Beck K Becker M Becker M Beckingham C Becot A J Beddall A Beddall V A Bednyakov M Bedognetti C P Bee L J Beemster T A Beermann M Begel J K Behr C Belanger-Champagne A S Bell G Bella L Bellagamba A Bellerive M Bellomo K Belotskiy O Beltramello N L Belyaev O Benary D Benchekroun M Bender K Bendtz N Benekos Y Benhammou E Benhar Noccioli J Benitez D P Benjamin J R Bensinger S Bentvelsen L Beresford M Beretta D Berge E Bergeaas Kuutmann N Berger J Beringer S Berlendis N R Bernard C Bernius F U Bernlochner T Berry P Berta C Bertella G Bertoli F Bertolucci I A Bertram C Bertsche D Bertsche G J Besjes O Bessidskaia Bylund M Bessner N Besson C Betancourt A Bethani S Bethke A J Bevan R M Bianchi L Bianchini M Bianco O Biebel D Biedermann R Bielski N V Biesuz M Biglietti J Bilbao De Mendizabal T R V Billoud H Bilokon M Bindi S Binet A Bingul C Bini S Biondi T Bisanz D M Bjergaard C W Black J E Black K M Black D Blackburn R E Blair J-B Blanchard T Blazek I Bloch C Blocker W Blum U Blumenschein S Blunier G J Bobbink V S Bobrovnikov S S Bocchetta A Bocci C Bock M Boehler D Boerner J A Bogaerts D Bogavac A G Bogdanchikov C Bohm V Boisvert P Bokan T Bold A S Boldyrev M Bomben M Bona M Boonekamp A Borisov G Borissov J Bortfeldt D Bortoletto V Bortolotto K Bos D Boscherini M Bosman J D Bossio Sola J Boudreau J Bouffard E V Bouhova-Thacker D Boumediene C Bourdarios S K Boutle A Boveia J Boyd I R Boyko J Bracinik A Brandt G Brandt O Brandt U Bratzler B Brau J E Brau H M Braun W D Breaden Madden K Brendlinger A J Brennan L Brenner R Brenner S Bressler T M Bristow D Britton D Britzger F M Brochu I Brock R Brock G Brooijmans T Brooks W K Brooks J Brosamer E Brost J H Broughton P A Bruckman de Renstrom D Bruncko R Bruneliere A Bruni G Bruni L S Bruni B H Brunt M Bruschi N Bruscino P Bryant L Bryngemark T Buanes Q Buat P Buchholz A G Buckley I A Budagov F Buehrer M K Bugge O Bulekov D Bullock H Burckhart S Burdin C D Burgard B Burghgrave K Burka S Burke I Burmeister J T P Burr E Busato D Büscher V Büscher P Bussey J M Butler C M Buttar J M Butterworth P Butti W Buttinger A Buzatu A R Buzykaev S Cabrera Urbán D Caforio V M Cairo O Cakir N Calace P Calafiura A Calandri G Calderini P Calfayan G Callea L P Caloba S Calvente Lopez D Calvet S Calvet T P Calvet R Camacho Toro S Camarda P Camarri D Cameron R Caminal Armadans C Camincher S Campana M Campanelli A Camplani A Campoverde V Canale A Canepa M Cano Bret J Cantero R Cantrill T Cao M D M Capeans Garrido I Caprini M Caprini M Capua R Caputo R M Carbone R Cardarelli F Cardillo I Carli T Carli G Carlino L Carminati S Caron E Carquin G D Carrillo-Montoya J R Carter J Carvalho D Casadei M P Casado M Casolino D W Casper E Castaneda-Miranda R Castelijn A Castelli V Castillo Gimenez N F Castro A Catinaccio J R Catmore A Cattai J Caudron V Cavaliere E Cavallaro D Cavalli M Cavalli-Sforza V Cavasinni F Ceradini L Cerda Alberich B C Cerio A S Cerqueira A Cerri L Cerrito F Cerutti M Cerv A Cervelli S A Cetin A Chafaq D Chakraborty S K Chan Y L Chan P Chang J D Chapman D G Charlton A Chatterjee C C Chau C A Chavez Barajas S Che S Cheatham A Chegwidden S Chekanov S V Chekulaev G A Chelkov M A Chelstowska C Chen H Chen K Chen S Chen S Chen X Chen Y Chen H C Cheng H J Cheng Y Cheng A Cheplakov E Cheremushkina R Cherkaoui El Moursli V Chernyatin E Cheu L Chevalier V Chiarella G Chiarelli G Chiodini A S Chisholm A Chitan M V Chizhov K Choi A R Chomont S Chouridou B K B Chow V Christodoulou D Chromek-Burckhart J Chudoba A J Chuinard J J Chwastowski L Chytka G Ciapetti A K Ciftci D Cinca V Cindro I A Cioara C Ciocca A Ciocio F Cirotto Z H Citron M Citterio

A search for the decays of the Higgs and Z bosons to a ϕ meson and a photon is performed with a pp collision data sample corresponding to an integrated luminosity of 2.7  fb^{-1} collected at sqrt[s]=13  TeV with the ATLAS detector at the LHC. No significant excess of events is observed above the background, and 95% confidence level upper limits on the branching fractions of the Higgs and Z bos...

2007
J. M. Butterworth J. R. Forshaw

At HERA energies photoproduction of jets is sensitive to very high parton densities and so the probability of more than one hard partonic scattering occurring in a single photon-proton collision may be signiicant. This eeect has been simulated using an eikonal prescription for the generation of the hard processes and the HERWIG parton showering and hadronization models. The rst results on simul...

Journal: :Journal of physics 2022

Strong field QED is an active research frontier. The investigation of fundamental phenomena such as pair creation, photon-photon and photon-electron interactions in the nonlinear regime are a formidable challenge -- both experimentally theoretically. Several experiments around world being planned or preparation to probe this strong regime. LUXE (Laser Und XFEL Experiment) experimental platform ...

Journal: :Nuclear Physics 2021

We use a hybrid model which relies on QCD effective kinetic theory – KøMPøST to dynamically bridge the gap between IP-Glasma initial states and viscous hydrodynamics, for theoretical interpretation of heavy-ion collision results. The hydrodynamic phase is then followed by dynamical freeze-out handled UrQMD. It observed that new pre-equilibrium/pre-hydro does influence extraction transport coeff...

Journal: :Crystals 2021

The recent development of energy-resolved scintillation crystals opens the way to build novel imaging concepts based on variable energy. Among them, Compton scattering tomography (CST) is one most ambitious concepts. Akin Computerized Tomography (CT), it consists in probing attenuation map an object interest using external ionizing sources but strives exploit scattered radiation as agent. For m...

Journal: :European Physical Journal C 2022

For the first time, production of a massive dark photon (DP) in $\gamma e^-$ scattering at future lepton colliders ILC, CLIC, and CEPC is examined. The invisible decay mode DP addressed. We have studied both unpolarized collision Compton backscattered photons with polarized electron. missing energy distributions are shown. considered wide range 10 GeV -- 1000 mass $m_{A'}$. excluded regions 95\...

2008
F. O. Durães F. S. Navarra G. Wilk

Recent DESY-HERA data on J/Ψ elasticity distribution show that it emerges mostly as a fast particle. Interpreting photoproduction as a collision between a pre-formed charmed hadron and the proton, the out-coming J/Ψ is a leading particle of the collision. We analyse these data using a model formulated to describe energy flow in hadron-hadron reactions. The measured J/Ψ spectrum can be successfu...

2000
Thomas C. Killian

We calculate the two-photon 1S-2S spectrum of an atomic hydrogen Bose-Einstein condensate in the regime where the cold collision frequency shift dominates the line shape. Wentzel-Kramers-Brillouin and static phase approximations are made to find the intensities for transitions from the condensate to motional eigenstates for 2S atoms. The excited-state wave functions are found using a mean field...

1994
Dominic Mayers Louis Salvail

In this paper we show that the BBCS-protocol implementing one of the most important cryptographic primitives oblivious transfer, is secure against any individual measurement allowed by quantum mechanics. We analyze the common situation where successive measurements on the same photon could be used to cheat in the protocol. We model this situation by using a single inner-product-preserving opera...

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