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Strong vertices of doubly heavy spin-3/2–spin-1/2 baryons with light mesons in light-cone QCD sum rules 光锥QCD和规则中双重自旋-3/2 -自旋-1/2重子与轻介子的强顶点
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-13 DOI: 10.1103/PHYSREVD.103.054044
T. Aliev, K. Şimşek
{"title":"Strong vertices of doubly heavy spin-\u00003/2\u0000–spin-\u00001/2\u0000 baryons with light mesons in light-cone QCD sum rules","authors":"T. Aliev, K. Şimşek","doi":"10.1103/PHYSREVD.103.054044","DOIUrl":"https://doi.org/10.1103/PHYSREVD.103.054044","url":null,"abstract":"In this paper, we analyze the doubly heavy spin-3/2--spin-1/2 baryons and light meson vertices within the method of light-cone QCD sum rules. These vertices are parametrized in terms of one (three) coupling constant(s) for the pseudoscalar (vector) mesons. The said coupling constants are calculated for all possible transitions. The results presented here can serve to be useful information in experimental as well as theoretical studies of the properties of doubly heavy baryons.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"409 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77253731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Suppression of electroweak instanton processes in high-energy collisions 高能碰撞中电弱瞬子过程的抑制
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-13 DOI: 10.1142/S0217751X21500329
V. Khoze, D. Milne
{"title":"Suppression of electroweak instanton processes in high-energy collisions","authors":"V. Khoze, D. Milne","doi":"10.1142/S0217751X21500329","DOIUrl":"https://doi.org/10.1142/S0217751X21500329","url":null,"abstract":"Electroweak instantons are a prediction of the Standard Model and have been studied in great detail in the past although they have not been observed. Earlier calculations of the instanton production cross section at colliders revealed that it was exponentially suppressed at low energies, but may grow large at energies (much) above the sphaleron mass. Such calculations faced difficulty in the breakdown of the instanton perturbation theory in the high-energy regime. In this paper we review the calculation for the electroweak instanton cross section using the optical theorem, including quantum effects arising from interactions in the initial state and show that this leads to an exponential suppression of the cross section at all energies, rendering the process unobservable.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89419670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Low energy constraints from absolute neutrino mass observables and lepton flavor violation in left-right symmetric model 绝对中微子质量观测的低能约束和左右对称模型中的轻子风味违逆
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-12 DOI: 10.1103/PHYSREVD.103.055016
S. Goswami, K. N. Vishnudath
{"title":"Low energy constraints from absolute neutrino mass observables and lepton flavor violation in left-right symmetric model","authors":"S. Goswami, K. N. Vishnudath","doi":"10.1103/PHYSREVD.103.055016","DOIUrl":"https://doi.org/10.1103/PHYSREVD.103.055016","url":null,"abstract":"We have studied the correlations among the three absolute neutrino mass observables - the effective Majorana mass ($m_{ee}$) which can be obtained from neutrinoless double beta decay, the electron neutrino mass ($m_{beta}$) which is measured in single beta decay experiments and the sum of the light neutrino masses ($Sigma$) which is constrained from cosmological observations, in the context of minimal left-right symmetric model. Two phenomenologically interesting cases of type-I seesaw dominance as well as type-II seesaw dominance have been considered. We have taken into account the independent constraints coming from lepton flavor violation, single $beta$ decay, cosmology and neutrinoless double beta decay and have determined the combined allowed parameter space that can be probed in the future experiments. We have also analyzed the correlations and tensions between the different mass variables. In addition, the constraints on the masses of the heavy particles coming from lepton flavor violation and the bounds on three absolute neutrino mass observables are also determined. We show that these constraints can rule out some of the parameter space which are not probed by the collider experiments.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"177 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79868519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Higher order conserved charge fluctuations inside the mixed phase 混合相内的高阶守恒电荷波动
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-12 DOI: 10.1103/PHYSREVC.103.024912
R. Poberezhnyuk, O. Savchuk, M. Gorenstein, V. Vovchenko, H. Stoecker
{"title":"Higher order conserved charge fluctuations inside the mixed phase","authors":"R. Poberezhnyuk, O. Savchuk, M. Gorenstein, V. Vovchenko, H. Stoecker","doi":"10.1103/PHYSREVC.103.024912","DOIUrl":"https://doi.org/10.1103/PHYSREVC.103.024912","url":null,"abstract":"General formulas are presented for higher order cumulants of the conserved charge statistical fluctuations inside the mixed phase. As a particular example the van der Waals model in the grand canonical ensemble is used. The higher order measures of the conserved charge fluctuations up to the hyperkurtosis are calculated in a vicinity of the critical point (CP). The analysis includes both the mixed phase region and the pure phases on the phase diagram. It is shown that even-order fluctuation measures, e.g. scaled variance, kurtosis, and hyperkurtosis, have only positive values in the mixed phase, and go to infinity at the CP. For odd-order measures, such as skewness and hyperskewness, the regions of positive and negative values are found near the left and right binodals, respectively. The obtained results are discussed in a context of the event-by-event fluctuation measurements in heavy-ion collisions.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77554385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Mixing and CP Violation in the Charm System 魅力体系中的混合与CP违反
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-09 DOI: 10.1146/annurev-nucl-102419-124613
A. Lenz, G. Wilkinson
{"title":"Mixing and CP Violation in the Charm System","authors":"A. Lenz, G. Wilkinson","doi":"10.1146/annurev-nucl-102419-124613","DOIUrl":"https://doi.org/10.1146/annurev-nucl-102419-124613","url":null,"abstract":"In recent years charm physics has undergone a renaissance, one which has been catalysed by an unexpected and impressive set of experimental results from the $B$-factories, the Tevatron and LHCb. The existence of $D^0bar{D}{}^0$ oscillations is now well established, and the recent discovery of $CP$ violation in $D^0$ decays has further renewed interest in the charm sector. In this article we review the current status of charm-mixing and $CP$-violation measurements, and assess their agreement with theoretical predictions within the Standard Model and beyond. We look forward to the great improvements in experimental precision that can be expected over the coming two decades, and the prospects for corresponding advances in theoretical understanding.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88768303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 21
Magnetic field dependence of the neutral pion mass in the linear sigma model with quarks: The strong field case 夸克线性西格玛模型中中性介子质量对磁场的依赖:强场情况
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-07 DOI: 10.1103/PHYSREVD.103.054038
A. Ayala, J. Hern'andez, L. Hern'andez, R. Farias, R. Zamora
{"title":"Magnetic field dependence of the neutral pion mass in the linear sigma model with quarks: The strong field case","authors":"A. Ayala, J. Hern'andez, L. Hern'andez, R. Farias, R. Zamora","doi":"10.1103/PHYSREVD.103.054038","DOIUrl":"https://doi.org/10.1103/PHYSREVD.103.054038","url":null,"abstract":"We use the linear sigma model with quarks to find the magnetic field-induced modifications to the neutral pion mass at one-loop level. The magnetic field effects are introduced by using charged particle propagators in the presence of a magnetic background in the strong field regime. We show that when accounting for the effects of the magnetic field on the model couplings, the vacuum sigma field and the neutral pion self-energy, the neutral pion mass decreases monotonically as a function of the field strength. We find an excellent qualitative and quantitative agreement with recent lattice QCD calculations, reproducing the monotonically decreasing trend with the field strength as well as the decrease when lattice data approaches the physical vacuum pion mass from larger values.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89458605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Improved sensitivity of interferometric gravitational-wave detectors to ultralight vector dark matter from the finite light-traveling time 提高干涉引力波探测器在有限光行时间内对超光矢量暗物质的灵敏度
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-06 DOI: 10.1103/PHYSREVD.103.L051702
S. Morisaki, Tomohiro Fujita, Y. Michimura, Hiromasa Nakatsuka, Ippei Obata
{"title":"Improved sensitivity of interferometric gravitational-wave detectors to ultralight vector dark matter from the finite light-traveling time","authors":"S. Morisaki, Tomohiro Fujita, Y. Michimura, Hiromasa Nakatsuka, Ippei Obata","doi":"10.1103/PHYSREVD.103.L051702","DOIUrl":"https://doi.org/10.1103/PHYSREVD.103.L051702","url":null,"abstract":"Recently several studies have pointed out that gravitational-wave detectors are sensitive to ultralight vector dark matter and can improve the current best constraints given by the Equivalence Principle tests. While a gravitational-wave detector is a highly precise measuring tool of the length difference of its arms, its sensitivity is limited because the displacements of its test mass mirrors caused by vector dark matter are almost common. In this Letter we point out that the sensitivity is significantly improved if the effect of finite light-traveling time in the detector's arms is taken into account. This effect enables advanced LIGO to improve the constraints on the $U(1)_{B-L}$ gauge coupling by an order of magnitude compared with the current best constraints. It also makes the sensitivities of the future gravitational-wave detectors overwhelmingly better than the current ones. The factor by which the constraints are improved due to the new effect depends on the mass of the vector dark matter, and the maximum improvement factors are $470$, $880$, $1600$, $180$ and $1400$ for advanced LIGO, Einstein Telescope, Cosmic Explorer, DECIGO and LISA respectively. Including the new effect, we update the constraints given by the first observing run of advanced LIGO and improve the constraints on the $U(1)_B$ gauge coupling by an order of magnitude compared with the current best constraints.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78315538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
New searches at reactor experiments based on the dark axion portal 基于暗轴子入口的反应堆实验的新搜索
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-06 DOI: 10.1103/PHYSREVD.103.075006
P. deNiverville, Hye-Sung Lee, Young-Min Lee
{"title":"New searches at reactor experiments based on the dark axion portal","authors":"P. deNiverville, Hye-Sung Lee, Young-Min Lee","doi":"10.1103/PHYSREVD.103.075006","DOIUrl":"https://doi.org/10.1103/PHYSREVD.103.075006","url":null,"abstract":"A nuclear reactor is a powerful tool to study neutrinos and light dark sector particles. Some of the reactor experiments have proven to be extremely useful already. Considering the great interest in the power of intensity frontier to search for new light particles, it would be desirable to explore more possibilities to exploit the existing reactor power sources for particle physics research. We suggest a new reactor experiment searching for the dark sector. The dark photon can be produced in a reactor core and decay into a photon and an axion in the presence of the dark axion portal through an axion-photon-dark photon vertex. We investigate the potential to search for this new vertex with a monophoton signature and present the expected sensitivities at some of the existing reactor neutrino experiment detectors.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79205233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Quantum kinetic theory for spin-1/2 fermions in Wigner function formalism 维格纳函数形式中自旋1/2费米子的量子动力学理论
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-05 DOI: 10.1142/S0217751X21300015
Jian-hua Gao, Z. Liang, Qun Wang
{"title":"Quantum kinetic theory for spin-1/2 fermions in Wigner function formalism","authors":"Jian-hua Gao, Z. Liang, Qun Wang","doi":"10.1142/S0217751X21300015","DOIUrl":"https://doi.org/10.1142/S0217751X21300015","url":null,"abstract":"We give a brief overview of the kinetic theory for spin-1/2 fermions in Wigner function formulism. The chiral and spin kinetic equations can be derived from equations for Wigner functions. A general Wigner function has 16 components which satisfy 32 coupled equations. For massless fermions, the number of independent equations can be significantly reduced due to the decoupling of left-handed and right-handed particles. It can be proved that out of many components of Wigner functions and their coupled equations, only one kinetic equation for the distribution function is independent. This is called the disentanglement theorem for Wigner functions of chiral fermions. For massive fermions, it turns out that one particle distribution function and three spin distribution functions are independent and satisfy four kinetic equations. Various chiral and spin effects such as chiral magnetic and votical effects, the chiral seperation effect, spin polarization effects can be consistently described in the formalism.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87869780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Neutrino experiments probe hadrophilic light dark matter 中微子实验探测亲水的轻暗物质
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-03 DOI: 10.21468/SCIPOSTPHYS.10.3.072
Yohei Ema, F. Sala, R. Sato
{"title":"Neutrino experiments probe hadrophilic light dark matter","authors":"Yohei Ema, F. Sala, R. Sato","doi":"10.21468/SCIPOSTPHYS.10.3.072","DOIUrl":"https://doi.org/10.21468/SCIPOSTPHYS.10.3.072","url":null,"abstract":"We use Super-K data to place new strong limits on interactions of sub-GeV Dark Matter (DM) with nuclei, that rely on the DM flux inevitably induced by cosmic-ray upscatterings. We derive analogous sensitivities at Hyper-K and DUNE and compare them with others, e.g. at JUNO. Using simplified models, we find that our proposal tests genuinely new parameter space, allowed both by theoretical consistency and by other direct detection experiments, cosmology, meson decays and our recast of monojet. Our results thus motivate and shape a new physics case for any large volume detector sensitive to nuclear recoils.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"116 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75881671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 20
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